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    • 专利摘要:
    antenna with adjustable beam characteristics. the present invention relates to an antenna, comprising the multiple elements of an array, with a first and a second feed point, each of which is associated with orthogonal polarizations; each antenna array element has a first and a second phase center, each of which is associated with orthogonal polarizations; the first and second phase centers of each antenna array element are arranged in at least two columns; and, an antenna port, connected with the first and second feed points, of the at least two antenna network elements, with the first phase center and the second, arranged in at least two columns, by means of a respective supply network. the supply network comprises a beamforming network, having a primary connection, connected with the antenna port, and at least four secondary connections. the beamforming network divides the energy between the first feed point and the second feed point, and controls the phase differences between the respective feed points, with a phase center arranged in the different columns.
    公开号:BR112012019194B1
    申请号:R112012019194-2
    申请日:2010-02-08
    公开日:2021-06-22
    发明作者:Telefonaktiebolaget Lm Ericsson (Publ)
    申请人:Telefonaktiebolaget Lm Ericsson (Publ)；
    IPC主号:
    专利说明:

    TECHNICAL FIELD
    [001] The present invention concerns an antenna with adjustable beam characteristics, such as beam width and beam direction. The invention also concerns a communication device and a communication system provided with this antenna. Fundamentals
    [002] Almost all base stations of antennas used for mobile communications use, to date, in their design, more or less fixed characteristics. One exception is the electrical antenna tilt, which is a frequently used feature. In addition, there are some products for which the width and/or direction can be changed.
    [003] The collapsible antennas, in which the characteristics (parameters) can be modified, or adjusted, after deployment are of interest, as they enable: - tune the network to modify parameters based on the long term, - tune the network, based on the short term, for example, to handle variations in traffic load over twenty-four hours.
    [004] Thus, there is a need to be able to adjust the beam width and adjust the direction of the beam direction, to achieve these characteristics.
    [005] Current implementations of these features are based on mechanical rotation, or moving parts of the antenna, which results in relatively complicated mechanical designs. Invention Summary
    [006] An objective of the present invention is to provide an antenna with adjustable beam characteristics, which is more flexible and has a simpler design, compared to prior art solutions.
    [007] This objective is achieved by the antenna with adjustable beam characteristics, which comprises: multiple elements in the arrays, each element in the array comprising a first feed point, associated with a first polarization, and a second feed point, associated with a second polarization, orthogonal to the first polarization; each element in the array having a first phase center associated with the first bias and a second phase center associated with the second bias; the first and second phase centers of the elements in the array being arranged in at least two columns, and one or more antenna ports; each antenna port is connected with the first and second feed points of at least two elements in array; with the first phase center and the second phase center arranged in at least two columns, by means of a respective supply network. The respective supply network comprises a beam, forming a network, having a primary connection, connected with the respective antenna port, and at least two secondary connections; the beam forming the network is configured to split the energy between the first feed point and the second feed point of the connected antenna network elements, and, to control phase shift differences, between the first feed points of the elements of antenna network elements, connected with the phase center, arranged in different columns, and the second feeding points of the antenna network elements, connected with the second phase center, arranged in different columns.
    [008] An advantage of the present invention is that an antenna with an adjustable beamwidth and/or beam steering can be achieved. The beam width, and/or beam direction, can be controlled by simple variable phase switches. The variable phase switch can, for example, be based on technology similar to that which has often been used in base station antennas for the purpose of remote electrical tilt control.
    [009] Additional goals and advantages can be found by an individual skilled in the art from the detailed description. Brief description of drawings
    [0010] The invention will be described with reference to the following drawings, which are provided by way of non-limiting examples, in which: Fig. 1 shows a first antenna configuration, which can be used in an implementation of the present invention.
    [0011] Fig. 2 shows examples of distribution networks, the antenna configuration of Figure 1, which can be used to form an elevation beam.
    [0012] Fig. 3 shows the formation of a beam network, intended to be connected with distribution networks, as illustrated in Figures 1 and 2, to obtain a first single beam antenna, according to the present invention.
    [0013] Fig. 4 shows the implementation of a beamforming network of Figure 3.
    [0014] Fig. 5 shows a predicted azimuth beam pattern for the first single-beam antenna, according to the invention, having a column separation DH=0.5À, with a first set of phase differences.
    [0015] Fig. 6 shows a predicted rise beam pattern for the first single-beam antenna, according to the invention, having a column separation DH=0.5À, with the first set of phase differences.
    [0016] Fig. 7 shows the predicted azimuth beam pattern for the first single-beam antenna, according to the invention, having a column separation DH=0.7À, with the second set of phase differences.
    [0017] Fig. 8 shows the elevation beam pattern provided for the first single beam antenna, according to the invention, having a column separation DH=0.7À, with the second set of phase differences.
    [0018] Fig. 9 shows an azimuth antenna pattern, provided for a second single-beam antenna, according to the invention, having a column separation DH=0.7À, with a third set of phase differences.
    [0019] Fig. 10 shows an azimuth antenna pattern, provided for a second single-beam antenna, according to the invention, having a column separation DH=0.7À, with the fourth set of phase differences.
    [0020] Fig. 11 shows a second antenna configuration that can be used for implementing the present invention.
    [0021] Fig. 12 shows examples of the distribution networks of the antenna configuration of Figure 11, which can be used for the formation of the elevation beam.
    [0022] Fig. 13 shows a first embodiment of a dual-beam forming network, according to the invention, intended to be connected with distribution networks, as illustrated in Figures 11 and 12, to obtain a first antenna beam, in accordance with the present invention.
    [0023] Fig. 14 shows a predicted azimuth beam pattern for the first dual-beam antenna, according to the invention, having a column separation DH=0.5À, with a first set of phase differences.
    [0024] Fig. 15 shows an elevation beam pattern, provided for the first dual-beam antenna, according to the invention, having a column separation DH=0.5À, with the first set of phase differences.
    [0025] Fig. 16 shows an azimuth antenna pattern, provided for the first dual-beam antenna, according to the invention, having a column separation DH=0.5À, with a second set of phase differences.
    [0026] Fig. 17 shows an elevation beam pattern, provided for the first dual-beam antenna, according to the invention, having a column separation DH=0.5À, with a second set of phase differences.
    [0027] Fig. 18 shows a second embodiment of a dual-beam forming network, according to the invention, intended to be connected with distribution networks, as illustrated in Figures 11 and 12, to obtain a second antenna of double beam, according to the present invention.
    [0028] Fig. 19 shows a third antenna configuration that can be used in implementing the present invention.
    [0029] Fig. 20 shows a third embodiment of a dual-beam forming network, according to the invention, which is intended to be connected with distribution networks, as illustrated in Figure 19, to obtain a second antenna of double beam, according to the present invention.
    [0030] Fig. 21 shows the azimuth beam pattern predicted for the second dual-beam antenna, according to the invention, having a column separation DH=0.5À, with a fifth set of phase differences.
    [0031] Fig. 22 shows an elevation beam pattern, provided for the second dual-beam antenna, according to the invention, having a column separation DH=0.5À, with a fifth set of phase differences.
    [0032] Fig. 23 shows different implementations of antenna network elements, in a single beam antenna, according to the invention.
    [0033] Fig. 24 shows an exemplary implementation of the antenna network elements in a dual-beam antenna, according to the invention.
    [0034] Fig. 25 shows the configuration of a generic antenna, which can be used in the implementation of the present invention.
    [0035] Figs. 26a - 26d show four alternative implementations of the antenna network elements.
    [0036] Fig. 27 shows a third single-beam antenna according to the invention.
    [0037] Fig.28 shows a third dual-beam antenna, according to the invention. Detailed Description
    [0038] The basic concept of the invention is an antenna with adjustable beamwidth and/or beam steering. The antenna comprises multiple dual polarized network elements; each having a first feed point associated with a first polarization and a second feed point associated with a second polarization that is orthogonal to the first polarization. Each element in the array has two phase centers, the first associated with the first bias, and the second associated with the second bias. The first phase center and the second phase center may coincide or differ depending on the actual configuration of the network elements.
    [0039] A phase center is defined as: "The location of a point associated with an antenna, so that, if it is taken as the center of a sphere whose radius extends into the distant region, the phase of a given component on the surface of the sphere of radiation is essentially constant, at least over the portion of the surface on which the radiation is significant", see IEEE Standard Definitions of Terms For Antennas, IEEE Std 145-1993 (ISBN 1-55937-317- two).
    [0040] In the following illustrative examples, the first and second phase centers of the multiple antenna network elements are arranged in at least two columns, so that the distance between the first phase centers arranged in different columns, preferably, is greater than 0.3 wavelengths of the transmitted/received signal using the present invention; and, more preferably, greater than 0.5 wavelengths. The same applies to second phase centers arranged in different columns.
    [0041] For each column, at least one of the feed points associated with the same polarization is connected through the distribution network, resulting in at least one linear arrangement per column, when the dual polarized antenna network elements are used.
    [0042] Linear arrangements of the same polarization but different columns are combined by means of a phase switch and an energy splitting device. The phase switch and the power splitting device share power with a variable relative phase difference. This results in one or more beam gates for each polarization, in which the horizontal beam, directed towards a beam, can be controlled by the variable phase difference of the phase switch and power splitting device associated with the beam gate. . At least one of the beams has a polarization, and at least one of the beams has a second polarization, orthogonal to the first polarization.
    [0043] The beam ports of the orthogonal polarizations are combined in pairs, producing an antenna with one or more antenna ports. With this technique, the beamwidth and beam direction associated with one or more antenna ports can be controlled by varying the relative phase difference in the phase switch and power-splitting devices.
    [0044] Below, antenna network elements are illustrated, such as dual polarized radiation elements, or, two single polarized elements with orthogonal polarizations, arranged in one or two columns, with a column separation and a row separation. These embodiments fulfill the requirement of arranging the first phase centers and the second phase centers in at least two columns; although this is not explicitly stated in the description of each embodiment.
    [0045] Figure 1 shows an antenna configuration (left) with N groups of antenna network elements, each with two elements of double polarized radiation. On the right is shown the indexing of the radiation elements, within the "n" group. The elements are arranged to form four linear arrays, each connected with an A-D gate. In this embodiment, each of the dual polarized antenna array elements 11 has a first phase center, associated with a first polarization, for example, the vertical polarization, and a second phase center, associated with a second polarization, that is, the horizontal polarization; if the first polarization is vertical. All antenna array elements are, in this embodiment, identical, and the first phase centers of the antenna array elements 11 are arranged in two columns, and the second phase center of the antenna array elements 11 they are also arranged in two columns, each column containing N antenna network elements.
    [0046] Figure 2 shows examples of distribution networks for Port A and Port B, and Figure 3 shows a beamforming network for adjusting the beam width and beam direction, consisting of switches of phase and power combiners / dividers.
    [0047] Figures 1-3, together, illustrate a first embodiment of an antenna according to the invention, which, in this example, is a single-beam antenna. The single-beam antenna comprises an antenna configuration 10, which has two columns of N groups of dual polarized network elements 11, with a DH column separation and a Dv row separation. In this embodiment, each "n" group comprises two vertically polarized radiation elements A,, and Cn, and, two horizontally polarized radiation elements BA and Dn (n=1 for N), where N is at least one ( N1), preferably more than two (N>2). Each antenna array element 11 has two feed points (not shown); a first feed point, associated with vertical polarization, i.e. connected with the An radiating element in the first column 12 and a Cr radiating element in the second column 14, respectively, and a second feed point associated with the horizontal polarization, i.e. connected with the radiating element 13, in a first column 12, and, with the radiating element 13, in the second column 14, respectively, see Figure 1.
    [0048] The first feed points, connected with the Ar radiating elements, in the left column 12, are connected by means of a 13A distribution network, preferably implemented as a formation network and lifting beam, with the port A, e, the second feed points, connected with radiation elements Bn in the left column 12, are connected by means of a second distribution network 13B, preferably implemented as an elevation beamforming network, with the gate B, see Figure 2. Similarly, the feed points, connected with the Cn and DA radiation elements in the right column of column 14, are connected by means of separate distribution networks (not shown), preferably implemented as lifting beam-forming networks, with gate C and gate D, respectively. In this way, for each column, an exclusive distribution network connects a port to the power points of the network elements 11, which have the same polarization; that is, the A gate for the AI-AN radiation elements, and the B gate for the Bl-BN radiation elements, etc.
    [0049] The four ports, port A - port D, are combined with an antenna port, port 1, by the beamforming network 20, as illustrated in Figure 3. The beamforming network 20 is provided with a primary connection 19, in order to be connected with antenna port 1, and, four secondary connections 15A-15D. Each gate A, B, C and D is connected with a secondary connection 15A, 156, 15c and 15D, respectively, of the beamforming network 20. The vertical polarized linear arrangement, corresponding to Gate A of the first column 12, and, the vertical polarized linear array, corresponding to Gate C of the second column 14, are connected by means of the first phase shift network, which controls the phase shift difference and the energy division between the columns. The first phase shift network comprises a first secondary power divider combiner 161, which divides the power between the columns, and, variable phase switches 17A and 17c, which apply phase shifts aA and ac, respectively. The horizontal polarized linear arrangement corresponding to Port B of the first column 12, and the horizontal polarized linear arrangement corresponding to Port D of the second column 14 are connected by means of a second phase change network, comprising a second combiner 1 separator. secondary power 162, which splits the power between the columns, and, variable-phase switches 178 and 17D, which apply phase shifts aB and an. The combined AC and BD ports are then connected via a primary energy splitter 1 combiner 18, which divides the energy between the radiating elements having different polarization, to Antenna Port 1.
    [0050] The beamforming network 20 and the distribution networks 13A-13D, as shown in Figure 2, together form the feed network that connects the antenna port 1 with the respective feed points, of the elements of the arrangement 11, arranged in the two columns.
    [0051] Figure 4 shows another example of the realization of a beamforming network 20 in Figure 3. A phase change network comprising two integrated power divider combiners 1 and two phase change devices 211 and 212 are used for feeding the A, C and B, D gates. The angle axy is the difference in the electrical phase angles between gate X and gate Y. In this case there is a phase difference aA(. =aA-centre gate A e a Gate C, and, a phase difference aBJ) = aB - a1) between Gate B and Gate D.
    [0052] Port A and Port C supply, with the same amplitude and with a phase difference to Ac, produce a vertical polarized beam in which the direction of the azimuth beam depends on the phase difference aAc. For the double column arrangement, in this example, the relationship between the spatial azimuth beam steering angle qi and the electrical phase difference a is given by:
    and vice versa
    where DH is the column separation and il is the wavelength of the transmitted/received signal.
    [0053] Similarly, supplying Port B and Port D, with the same amplitude and with a phase difference aBD, produces a polarized beam in which the direction of the azimuth beam depends on the phase difference aBb.
    [0054] The primary power combiner/splitter 18 in Figure 3 or Figure 4 combines the combined AC ports with the combined BD ports for Antenna Port 1. Since the combined AC ports correspond to the vertical polarized radiation pattern, and, that the combined ports BD correspond to the horizontal polarized radiation pattern, the resulting radiation pattern from antenna gate 1 is equal to the sum of the energy of the radiation pattern of the combined ports AC and the radiation pattern of the combined ports BD. In this way, the beamwidth and beam direction of the Antenna Port 1 radiation pattern can be controlled via the variable phases aA, aB, ac and an in Figure 3, or the variable phase differences ailc and am , in Figure 4.
    [0055] Note that Beam Gate 1 will have a polarization that varies with the azimuth angle, if the vertical and horizontal beams do not have the same direction and shape.
    [0056] For simplicity, it is assumed that all antennas, in the illustrative examples, are oriented vertically with columns of antenna network elements, along the vertical dimension. In this way, horizontal angles are associated with angles around an axis parallel to the columns, and elevation angles are associated with angles relative to the vertical axis, respectively. Generally speaking, however, antennas can have any orientation. Example 1
    [0057] By way of example, a first single-beam antenna, as described in connection with Figures 1-4, is simulated, in which the number of antenna network elements in each column is 12 (i.e., N =12) and the separation of the column DA, between the antenna network elements, and thus the distance between the first and second phase centers arranged in different columns, is selected to be half wavelength (DH= 0.5À), and assuming a radiation element pattern with a half-energy beamwidth of 900.
    [0058] Figure 5 shows azimuth beam patterns predicted for the first single beam antenna and variable phases:
    for the different angles a, expressed in terms of the direction angle of the spatial beam 0(a). The curve (0,0) is denoted by 0(a Ar) = 0(a B') = 0 ; the curve (17;-17) is denoted by 0(a A(,) = -0(a mi) = 17; the curve (23;-23) is denoted by qi(a Ac) = --0(a 81)) = 23; the curve (27;-27) is denoted by 0(a A) = -0(a BI)) = 27 ; and, the curve (30;-30) is denoted by 0(a4(.) = -0(a B„) = 30. For the azimuth beam patterns, the half-energy beamwidth is 50, 56, 65, 77 and 90 degrees, respectively.
    [0059] Figure 6 shows the corresponding elevation patterns for the first single beam antenna. The five patterns are on top of each other.
    [0060] Figure 7 shows azimuth beam patterns, predicted for the same configuration as the single beam antenna, but with the phase differences at Ac and BD established according to:
    where 3 = [0°, 10° and 20°]. The curve (17; -17) is denoted by 8 = 0° , that is, (b(a ,i(,)= 17° and q3(a ,3,)=. -17° , similarly to the curve (27; - 7) is denoted by 8 =10° the curve (37;3) is denoted by 8 = 20°. Thus, the spatial beam steering angles are +1-17°, plus the beam deviations 0°, 10°, and 20°, respectively. For azimuth beam patterns, the half energy bandwidth is 56 degrees, for all deviations.
    [0061] Figure 8 shows the corresponding elevation patterns for the first single beam antenna with 6 = [0°, 10° and 20°]. The three patterns are on top of each other. Example 2
    [0062] By way of further example, a second single-beam antenna, as described in connection with Figures 1-4, in which the number of antenna network elements in each column is 12 (i.e., N=12 ) and separation of the DH column between the antenna network elements, and thus the distance between the first and second phase centers, arranged in different columns, is selected to be seven tenths of a wavelength (DH=0 ,7À), and assuming a radiation element pattern with a beamwidth of half the energy of 65°.
    [0063] Figure 9 shows the azimuth beam patterns, predicted for the second single beam antenna and variable phases:
    for different angles a expressed in terms of the special beam steering angle 0(a). The curve (0,0) is denoted by 0(a Ar) Ar) = 0(a131)) = 0 ; the curve (13;-13) is denoted by 0(a Ac.) = -0(a„„) = 13; the curve (19;-19) is denoted by (b(a,c) = -0(a B„) = 19 ; the curve (22;-22) is denoted by q3(a,c) = -0(a B1)) = 22; and the curve (23;-23) is denoted by 0(a4(.) = -0(a Bi)) = 23 . For azimuth beam patterns the half energy bandwidth is 35, 41, 55, 71, and 83 degrees, respectively.
    [0064] Figure 10 shows azimuth beam patterns, for the second single beam antenna, but with the phase differences at Ac and established according to:
    where õ = [0° and 10°]. The curve (13;-13) is denoted by 8 = 0°, that is, 0(a Ac) = 13° and cb(a11,) = -13'; similarly, the curve (23;-3) is denoted by 8 =10° . Thus, the directing angles of the spatial beam O are +/- 13°, plus the beam deviations of 0° and 10°, respectively. For azimuth beam patterns the half energy bandwidth is 41 degrees for both beams.
    [0065] The above examples describe a single beam antenna. However, in mobile communication systems it is common to use dual polarized antennas, in order to achieve a dual beam antenna; that is, having two beams covering the same area, but with orthogonal polarization.
    [0066] Figure 11 shows an antenna configuration (left), according to the invention, with M groups; each with four double polarized antenna array elements; each having a first supply point and a second supply point, associated with orthogonal polarizations and having a first and second phase center arranged in two columns, as described in connection with Figure 1. On the right, the indexing the elements within an "m" group. The elements are arranged to form eight linear arrays, each of which is connected with an AH gate.
    [0067] Figure 12 shows examples of distribution networks for Port A and Port B, and Figure 13 shows a beamforming network for adjusting the beam width of beam steering, consisting of phase switches and power combiners / splitters.
    [0068] Figures 11-13, together, illustrate a second embodiment of an antenna according to the invention, which, in this example, is a double-beam antenna with orthogonal polarization, in which each beam has a beam width and a variable beam steering. The dual beam antenna comprises an antenna configuration 30, which has two columns of dual network elements 31, with a DH column separation, and a Dv row separation. In this embodiment each "m" group comprises four vertically polarized radiation elements Em, Cm, Em and Gm, and four horizontally polarized radiation elements Bm, Dm, Fm and Hm (m=1 for M), where M is at least one (M1), preferably more than two (M>2). Each antenna array element 31 has two feed points (not shown), a first feed point for vertical polarization, and a second feed point for horizontal polarization. The first feed point is connected with the Am radiating elements and with the Cm radiating elements in a first column 32, and Em radiating elements and Gm radiating elements in a second column 34. The second feed point is connected with the Bm radiation elements and the Dr radiation elements in a first column 32, and with the Fm radiation elements and the Hm radiation elements in a second column 34, see Figure 11.
    [0069] Each feed point of each second radiation element in each column is connected through a distribution network, preferably implemented as an elevation beamforming network, resulting in four ports per column AD and É- A, respectively, see Figure 11. Figure 12 provides an example of distribution networks 33A, 33B, preferably implemented as an elevation beamforming network. The power points, connected with the Al-Am radiation elements, are connected through a 33A distribution network with the A gate, forming a vertical linear array of M elements with vertical polarization. The supply points, connected with the radiation elements 131-Bm, are connected by means of a second distribution network 33B, with a gate B, forming a vertical linear array of M elements with horizontal polarization. Similarly, the supply points connected with the Cl-CM radiation elements via HI-HM are connected, via individual distribution networks 33c-33H, to the C-H ports. In this way, each column consists of two linear arrays of M elements, interspersed with dual polarized antenna array elements, producing a total of eight A-H gates, see Figures 11 and 12.
    [0070] The eight ports, Port A - Port H, are then combined with two antenna ports, Port 1 and Port 2, in a first embodiment of a dual beamforming network 40 (comprising two networks of separate beamforming network 401 and 402), as illustrated in Figure 13. Each separate beamforming network 401, 402 is provided with a primary connection 391, 392, intended to be connected with the antenna port 1 and the port of antenna 2, respectively. Each AH port is connected with a respective secondary connection 35A-35H of the dual beamforming network 40. The vertical polarized linear arrangement corresponding to Port A of the first column 32, and the vertical polarized linear arrangement corresponding to Port G of the second column 34, are connected via a first phase shift network, comprising a first secondary combiner/power divider 361 and variable phase switches 37A and 37G, applying phase shifts a/1 and aG, respectively. The horizontal polarized linear arrangement, corresponding to Gate D of the first column 32, and the linear polarized horizontal arrangement, corresponding to Gate F of the second column 34, are connected by means of a second phase shift network, comprising a second combiner / divider secondary power 362 and variable phase switches 37D and 37F, applying phase shifts ai, and al;, respectively. The combined AG and DF ports are then combined by a primary power combiner/splitter 38, via the primary connection 391, with Antenna Port 1. Similarly, Antenna Port 2 is created by combining the ports C, E, B and H, using the 402 beamforming network, as illustrated in Figure 13. With this arrangement, the beam width and/or beam direction of the antenna energy patterns of the Antenna Port 1 and Antenna Port 2 can be modified by selecting the appropriate phase angles aA, aB, air, aD, aG and aH.
    [0071] Note that the beams of antenna port 1 and antenna port 2 will have an orthogonal polarization, for all azimuth angles, if the phase difference between the horizontal and vertical polarized radiation elements of the antenna port 1 is suitably chosen, with respect to the phase difference, between the horizontal and vertical polarized radiation elements of antenna gate 2, as illustrated below. Example 3
    [0072] By way of example, a dual-beam antenna is described, in connection with Figures 11-13, in which the number of antenna network elements in each column 12 (i.e., M=6) and the separation of DH column, between the antenna network elements, and thus the distance between the first and second phase centers, arranged in the different columns, is selected to be half a wavelength (DH=0, 5À), and assuming a radiation element pattern with a beamwidth of half the energy of 90°.
    [0073] Figure 14 shows the azimuth beam patterns, predicted for the first dual-beam antenna and variable phases:
    for the different angles a, expressed in terms of the spatial beam steering angle 0(a). Curve 1(0;0) and curve 2(0,0), which are denoted by 95 = 0 , for antenna port, overlap; and, similarly, curve 1(17;-17) and curve 2(-17;17); curve 1(23,-23) and curve 2(-23;23), curve 1(27;-27) and curve 2(-27;27); and, curve 1(30;30) and curve 2(-30;30) are, as to the pair, identical, that is, the radiation patterns associated with antenna ports 1 and 2 overlap. For azimuth beam patterns, the half energy bandwidth is 50, 56, 65, 77, and 90 degrees, respectively.
    [0074] The relationship between the spatial angle O and the phase difference a is given by:
    and vice versa

    [0075] Figure 15 shows the corresponding elevation patterns for the first dual-beam antenna.
    [0076] Figure 16 shows azimuth beam patterns, predicted for the same configuration as the first dual-beam antenna, but with phase differences at A - aG, -aa -a and -a established according to:
    where 8 = [00, 10° and 20°]. The curve 1(17;-17) is equal to 2(-17;17) which is denoted by 8 = 0°, that is, 0(aA-a(,)=0(a3-aH)=17° ; and, similarly, curve 1(27;-7) is equal to 2(-7;27), which is denoted by 5 .10° , and, curve 1(37;3) is equal to 2(3;37) which is denoted by 8 = 20°. The spatial beam steering angles (relative to the AG, BH, CE and BH gates) are +1-17°, plus the antenna beam deviations of 0°, 10° and 20° respectively For azimuth beam patterns, the half energy bandwidth is 56 degrees for all settings.
    [0077] Figure 17 shows the corresponding elevation patterns.
    [0078] Figure 18 shows a second embodiment of a dual-beam forming network, according to the invention, intended to be connected with distribution networks, as shown in Figures 11 and 12, to obtain a second antenna dual beam, in accordance with the present invention, in which the AG gate is combined with the BH gate to form an antenna gate 1; and similarly the CE port is combined with the DF port to form antenna port 2.
    [0079] Similar azimuth beam patterns, as disclosed in Figures 14-17, will be achieved when using the configuration of Figure 18, instead of the configuration described in Figure 13.
    [0080] Figure 19 shows an antenna configuration (left), according to the invention, with R groups, each of which has six dual polarized antenna network elements. On the right is shown the indexing of elements within an "r" group. The elements are arranged to form twelve linear arrays, each of which is connected with an A-L gate.
    [0081] Figure 20 illustrates a beamforming network, for adjusting the beamwidth and beam steering, according to the invention, consisting of phase switches and power-splitting combiners.
    [0082] Figure 19 and Figure 20, together, illustrate a third embodiment of an antenna, according to the invention, which, in this example, is a double beam antenna with orthogonal polarization, in which each beam has width beam and variable beam steering. The dual-beam antenna comprises an antenna configuration 50, which has three columns 52-54 of R groups of dual polarized antenna array elements 51, with a DH column separation and a Dv array separation. In this embodiment, each "r" group comprises six vertically polarized radiation elements Ar, Cr, Er, Gr, Ir and Kr, and six horizontally polarized radiation elements Br, Dr, Fr, Hr, Jr and Lr (r =1 to R), where R is at least one (R1), but preferably more than 2 (R>2). Each antenna network element has two feed points; a first feed point for vertical polarization, and a second feed point for horizontal polarization, see Figure 19. The difference from the second embodiment of the antenna, described in connection with Figures 11-13 is that the antenna, in this example, comprises dual polarized antenna network elements in three columns, rather than two; but, the principles for achieving beamwidth and variable beam steering are the same.
    [0083] Each feed point, of each second radiation element in each column, is connected by means of a distribution network, preferably implemented as an elevation beamforming network; resulting in four ports per column AD, EH and IL, respectively, see Figure 19. In this way, the ports of the Ai-AR antenna element are connected, via a first distribution network (not shown), with a port A, forming a vertical linear array of R elements with vertical polarization. The ports of antenna element 131-BR are connected, via a second distribution network (not shown), with port B; forming a vertical linear arrangement of R elements with horizontal polarization. Similarly, antenna elements Cl-CR through LI-LR are connected via individual elevation beamforming networks; forming the C-L gates. In this way each column consists of two linear arrays of R elements, interspersed with double polarized elements; producing a total of twelve A-L ports, see Figure 19.
    [0084] The twelve ports, Port A - Port L, are combined into two antenna ports, Port 1 and Port 2, in a third embodiment of a beamforming network 60 (comprising two separate beamforming networks 601 and 602), as illustrated in Figure 20. Each separate beamforming network 601, 602 is provided with a primary connection 591, 592, intended to be connected with antenna port 1 and antenna port 2, respectively. Each AL port is connected to a respective secondary connection 55A-55H of the dual beamforming network 60. The vertical polarized linear arrangement, corresponding to Port A of the first column 52, the vertical polarized linear arrangement, corresponding to Port G of the second column 53, and the vertical polarized linear array corresponding to Port 1 of the third column 54, are connected by means of a first phase shift network, comprising a first combiner/secondary power divider 561 and by variable phase switches 57A, 57c and 571, applying the phase shifts aA, aG and al, respectively. The horizontal polarized linear arrangement, corresponding to Port B of the first column 52, the horizontal polarized linear arrangement, corresponding to Port H of the second column 53, and the horizontal polarized linear arrangement, corresponding to Port J of the third column 54, are connected by means of a second phase shift network, comprising a second combiner/secondary power divider 562 and variable phase switches 57B, 57H and 57, applying phase shifts a8, an and aj, respectively.
    [0085] The combined ports, AGI and BHJ, are then combined by a primary power combiner/splitter 58, via the primary connection 591 at Antenna Port 1. Similarly, Antenna Port 2 is created by combination of gates C, EK, D, F and L, using the beamforming network 602, as illustrated in Figure 20. Similar to the examples above, this arrangement allows changing the beam width and/or the direction of the beam steering, Antenna Port 1 and Antenna Port 2 antenna energy patterns by properly selecting the phase angles from aA to aL as illustrated below. Example 4
    [0086] By way of example, a second dual-beam antenna, as described in connection with Figures 19-20, in which the number of antenna array elements in each column is 12 (i.e., R=6) and separating the DH column between the antenna network elements; and in this way the distance between the first and second phase centers, arranged in the different columns, is selected to be half a wavelength (DH=0.5À), and, assuming an element pattern of radiation with a beamwidth of half the energy of 90°.
    [0087] Figure 21 shows predicted azimuth beam patterns for the second dual beam antenna and variable phases.
    [0088] A linear slope is applied, that is, the same phase differences, between two adjacent elements of the array, since they have the same spatial separation. The curve 1(0;0) and the curve 2(0,0), which is denoted by = 0 , for each antenna port, overlap; and, similarly, curve 1(10;1 O) and curve 2(-10;10); curve 1(16,-16) and curve 2(-16;16); and, curve 1(19;-19) and curve 2(-19;19) are, as to the pair, identical; that is, the radiation patterns associated with antenna ports 1 and 2 overlap. For azimuth beam patterns, the half energy bandwidth is 35, 41, 55, and 67 degrees, respectively.
    [0089] Figure 22 shows the corresponding elevation patterns for the second dual-beam antenna.
    [0090] It should be noted that, although the antenna network elements, described in connection with Figures 1, 11 and 19 have been illustrated as arrangement elements with a polarized radiation element, the invention should not be limited to these . As is obvious to anyone skilled in the art, from the present description, it is possible to create similar behavior using antenna array elements, with unique polarized radiation elements, as long as the antenna array elements are superimposed.
    [0091] Figures 23 and 24 illustrate how an antenna can be divided into two antenna network elements (for a single-beam antenna), or, into four antenna network elements (for a double-beam antenna). An antenna array element has a first feed point, associated with a first polarization, and a second feed point, associated with a second polarization, orthogonal to the first polarization. Shaded areas indicate the antenna surface required to implement each element of the array.
    [0092] In Figure 23, an antenna, which is provided with a single antenna port 1, comprises two elements of the array, arranged on the surface of the antenna. Feed points are indicated with reference to the group index in Figure 1.
    [0093] The configuration of the antenna can be performed by two antenna network elements arranged next to each other. Having a first antenna array element, a first feed point "A" associated with a first polarization, and a second "B" point with the second polarization, and, having a second antenna array element, a first supply point "C" associated with the first bias, and a second supply point "D" associated with the second bias. For each antenna network element, the phase centers for the different polarizations can be considered as arranged in the same column.
    [0094] The same antenna configuration can be performed by two elements of the configuration superimposed on each other. A first antenna array element, having a first feed point "A" associated with the first polarization, and a second feed point "D" with the second polarization; and, having a second antenna array element, a first feed point, having a second antenna array element, a first feed point "C" associated with the first bias, and a second feed point "B ", associated with the second bias. For each antenna network element, the phase centers, for the different polarizations, can be considered to be arranged in different columns.
    [0095] An antenna network element may also comprise a plurality of radiation elements, interconnected by means of a supply network, to a common supply point for each polarization. An example of this is described in Figure 24.
    [0096] The antenna comprises twelve elements of dual polarized radiation, arranged in two columns. The radiating elements are connected with two antenna ports 1 and 2 by means of a beamforming network such as disclosed in connection with Figure 13 or 18. The feed points are indicated with reference to the index of groups in Figure 11.
    [0097] This antenna configuration was previously described in connection with Figure 1113, but it can be performed in many different ways. In Figure 24 an alternative is presented, which comprises four antenna network elements, which are superimposed to perform the antenna configuration. A first antenna array element, having an associated first feed point "A" connecting to every second radiating element in the first column, a feed point, and a second feed point "F" connected to every second element of radiation in the second column, with the second polarization. Similarly, the second antenna network element has feed points D and G, the third antenna network element has feed points B and E, and the fourth antenna network element has feed points C and H.
    [0098] In the embodiments described above, different polarizations were exemplified, such as vertical and horizontal polarization, created by a single polarized array element or a dual polarized antenna network element. Radiation elements were used to illustrate a simpler implementation, and also to clearly describe the inventive concept. However, it should be noted that antenna network elements that have another polarization, such as, for example, +45 degrees/-45 degrees, or +60 degrees/-30 degrees, can be used, as long as the difference between the two polarizations are more or less than 90 degrees (ie essentially orthogonal). Furthermore, it is even conceivable to have antenna network elements with polarizations of 0/+90 degrees, in a first column, and antenna network elements with -20/+70, in a second column. In this case, it is necessary to adapt the supply of the antenna network elements so that the polarizations of all the antenna network elements, arranged in the different columns, are the same. This can be achieved by applying a polarization transformer directly to the antenna network element ports to make all antenna network elements have the same polarizations. The polarization transformer is preferably visualized as constituting a part of the antenna array element, and then the polarizations will be identical for all antenna array elements.
    [0099] Figure 25, in connection with Figures 26a - 26d, will also illustrate the possibilities of using other configurations of the elements of the arrangement, and still obtain an antenna with the same properties as described above.
    [00100] Figure 25 shows the configuration of a generic antenna 70, with the antenna network elements arranged in two columns. Each column comprises ten elements in the arrangement. The X1-X10 antenna network elements are arranged in a first column, and the Y Y - 1- -10 antenna network elements are arranged in a second column. Each antenna array element is, in this generic example, dual polarized, and has a first feed point 71 (shown by a solid line), and a second feed point 72 (shown in dotted line). The radiating elements within an antenna array element, with a first polarization, are connected with the first supply point 71, and, the radiating elements, with a second polarization, orthogonal to the first polarization, are connected with the second power point 72.
    [00101] The feed points of the X1-X10 antenna network elements are connected with a certain number of ports, through distribution networks (not shown). The power points of the Y1-Y10 antenna network elements are connected to the same number of ports via a distribution network (not shown). The number of ports depends on how many antenna network elements are included in a group, as discussed above; if only two antenna network elements, with dual polarizations, are included in a group, the antenna network element feed points in each column will be connected to two ports (see Figure 1). However, if four antenna network elements, with dual polarizations, are included in a group, the power points of the antenna network elements in each column will be connected to four ports (see Figure 11).
    [00102] The horizontal distance DH between columns, and the vertical distance Dv between each row are usually structural parameters, determined when the multi-beam antenna is designed. These are preferably set to be between 0.3 and 1 . However, it is possible to design a multi-beam antenna in which the horizontal distance and/or the vertical distance can be changed, to modify the characteristics of the multi-beam antenna.
    [00103] The antenna network elements, illustrated in Figure 25, can be performed in a sub-array, having an n x m matrix of radiation elements; where n and m are numbers equal to or greater than 1 (n,m1). Each radiating element, in a sub-array, is connected with its respective supply point.
    [00104] Figures 26a-26d show four examples of elements of the array, which can be used in the antenna illustrated in Figure 25. All exemplified antenna network elements comprise double polarized radiation elements, and thus the points of power supply 71 and 72. It should be noted that each of the exemplified antenna network elements may have unique polarized radiation elements, as illustrated in connection with Figures 23 and 24.
    [00105] Figure 26a illustrates a single element of the double polarized arrangement 73, having a first supply point 71, connected with a first radiation element 74 (array 1 x 1), with a first polarization, and a second point of supply 72, connected with a second radiating element 75, with a second polarization, orthogonal to the first polarization.
    [00106] Figure 26b illustrates a double polarized element of array 76, having a first feed point 71 connected to a 2 x 1 matrix of first radiation elements 74, with a first polarization, and a second feed point 72 connected with a 2 x 1 matrix of second radiation elements 75, with a second polarization orthogonal to the first polarization.
    [00107] Figure 26c illustrates a double polarized element 77 of the arrangement, having a first feed point 71, connected with a 1 x 2 matrix of first radiation elements 74 with a first polarization, and a second feed point 72, connected with a 1 x 2 matrix of the second radiation elements 75, with a second polarization orthogonal to the first polarization.
    [00108] Figure 26d illustrates a double polarized element of array 78, having a first feed point 71 connected with a 2 x 2 matrix of first radiation elements 74 with a first polarization, and a second feed point 72 connected with a 2 x 2 matrix of second radiation elements 75, with a second polarization orthogonal to the first polarization.
    [00109] All antenna network elements, in the generic antenna configuration, described in Figure 25 may, for example, have the same type of double polarized element 77 of the arrangement; but, of course, it is possible that each antenna network element, in the antenna configuration, is different. The important feature is that the antenna network element is provided with two power points, associated with orthogonal polarizations, and that the phase centers, associated with each polarization, are arranged in at least two columns, as described above. Example 5
    [00110] Figure 27 shows a third single-beam antenna 80, according to the invention, comprising an antenna configuration 81; four distribution networks 82a - 82D; and a beamforming array 83. The antenna comprises a column with eight antenna array elements, interspersed with two different types 78 and 79. Each antenna array element has a first feed point (and a first phase center ), associated with a first bias, and, a second power point (and a second phase center), associated with a second bias, orthogonal to the first bias. The first phase centers of the first type of antenna array element 78 are arranged in a first column, and the first phase centers of the second antenna array elements 79 are arranged in a second column. The opposite applies to the second phase centers of the first type 78 and the second type 79 of antenna array elements. Each distribution network is configured to connect each respective feed point of the same type of antenna network element, with a port (A-D); and, by means of the beamforming network 83, to connect the ports (A-D) to a single antenna port 1.
    [00111] In this example, the antenna network elements are divided into four groups 14, and each antenna network element comprises two unique polarized radiation elements, each connected with a respective power point. Each "s" group comprises the first type of antenna array element 78, having a vertically polarized radiating element As and a horizontally polarized radiating element 135, and the second type of array element 79 having a horizontally polarized radiating element polarized Cs, and a vertically polarized radiation element D. The phase centers of the radiation elements As and Cs are arranged in a first column 84, and the phase centers of the radiation elements Bs and Ds are arranged in a second column 85. The vertical radiating elements in the first column 84, i.e. Al-A4, are connected to a gate A, by means of a first distribution network 82A, and the horizontal radiating elements in the first column 84, i.e. , C1C4, are connected to port C via a second distribution network 82c. The same applies to the radiating elements in second column 85; that is, the radiation elements B1-B4 are connected, through a third distribution network, with the gate B, and the radiation elements D1-D4 are connected, through a fourth distribution network, with the gate D. Distribution networks are preferably implemented as separate lifting beamforming networks.
    [00112] The four ports, Port A - Port D, are combined with an antenna port, Port 1, by the beamforming network 83. The beamforming network 83 is provided with a primary connection 89d, intended to be connected with antenna port 1, and, with the four secondary connections 86A-86D. Each port A, B, C and D is connected with a respective secondary connection of the beamforming network 83. The vertical polarized linear arrangement, corresponding to Port A of each first column 84, and the vertical polarized linear arrangement, corresponding to D-port of second column 85 are connected via a first integrated power combiner/splitter and a phase shift device 871 (similar to that described in connection with Figure 4). The horizontal polarized linear arrangement, corresponding to Port C of the first column 84, and the horizontal polarized linear arrangement, corresponding to Port B of the second column 85 are connected by means of a second integrated combiner/power divider, and, a device phase shift switch 872. The combined AD and BD ports are then connected via a primary power combiner/splitter 88, combining/splitting the energy between the radiating elements having different polarization, with Antenna Port 1 . Example 6
    [00113] Fig. 28 shows a third dual-beam antenna 90, according to the invention, comprising an antenna configuration similar to that described in Figure 27, except that all antenna network elements are vertically oriented, and the first types of antenna array elements 78 are arranged in a first column 94, and the second types of antenna array elements 79 are arranged in a second column 95. The antenna array elements are divided into only two groups, each "t" group having four antenna network elements. The single polarized radiation elements At, Bt, Et and Ft belong to a first set, and the single polarized radiation elements Ct, Dt, Gt and Ht belong to a second set. Note that the first phase center and the second phase center of the first type of antenna array elements 78 are arranged in the first column 94, and that the first phase center and the second phase center of the second type of antenna array elements 79 are arranged in the second column 95.
    [00114] Eight ports, Port A - Port H, are combined with two antenna ports, Port 1 and Port 2, by two beamforming networks 931 and 932. Each beamforming network is provided with a primary connection, designed to be connected with the respective antenna port, and with four secondary connections. Each A-H port is connected with the respective secondary beam-forming network connection. The respective feed point of each second antenna network element in each column is connected by means of a separate distribution network 92A-92H, which is preferably implemented as an elevation beamforming network, with the AH ports, see Figure 28.
    [00115] Four gates A, 8, E and F are connected with a first beamforming network 931. The vertical polarized arrangement, corresponding to gate A of a first column 94, and the vertical polarized linear arrangement, corresponding to the gate F of the second column 95 are connected, by means of a first phase shift network, comprising a first integrated power combiner/splitter and a phase shift device 971 (similar to that described in connection with Figure 4). The horizontal linear polarized arrangement, corresponding to Port B of the first column 94, and the horizontal linear polarized arrangement, corresponding to Port E of the second column 95, are connected by means of a second phase shift network, comprising a second combiner / integrated power splitter and a phase shift device 972. The combined AF and BE ports are then connected, via a primary power splitter / combiner 981, combining/splitting the energy between the radiating elements belonging to the first set and having different polarization, with Antenna Port 1.
    [00116] Similarly, ports C, D, G and H are connected, via a second beamforming network 932, with Antenna Port 2.
    [00117] In all the embodiments described above, it is possible to implement an electrical inclination; however, there is no additional effect for the invention. Furthermore, the combiners/dividers described in connection with Figures 3, 4, 13, 18, 20, 27 and 28 may have variations (or at least unequal fixed energy division). A non-equal mix/split can be implemented, for both the primary and secondary combiners/splitters, but it is more advantageous for the primary combiner/splitter.
    [00118] Each supply network, described in connection with the above embodiments, comprises a beamforming network and multiple and distribution networks. Each distribution network exclusively connects a respective secondary connection of the beamforming network, with the first feed points of the antenna network elements connected with the first phase center, arranged in a respective column; or, exclusively connect a respective secondary connection of the beamforming network, with the second feed points, of the antenna network elements connected with the second phase center, arranged in a respective column.
    权利要求:
    Claims (15)
    [0001]
    1. Antenna with adjustable beam characteristics, comprising: - an antenna configuration (30) comprising multiple array elements (31), one or more antenna ports (Port 1, Port 2), and a distribution network; wherein the multiple array elements (31) comprise: respective first feed points associated with a first bias; and, respective second feed points associated with a second bias, orthogonal to the first bias; the multiple array elements (31) further having respective first phase centers associated with the first bias and respective second phase centers associated with the second bias, wherein the first phase centers are arranged in at least two columns and the second centers of phase are arranged in at least two columns; and, wherein the multiple array elements (31) are arranged in at least two array element groups (31), each of the at least two array elements comprising at least two array elements (31); wherein each of the one or more antenna ports (Port 1, Port 2) is connected with the first feed points and the second feed points of at least two of the array elements (31), wherein the first centers of phase and the second phase centers are arranged in the at least two columns by means of a supply network; characterized in that the respective supply network comprises forming a beamforming network (401, 402) and a plurality of distribution networks; the beamforming network (401, 402) having: a primary connection (391) connected to a respective one of the one or more antenna ports (Port 1, Port 2); and, at least four secondary connections (35A, 35G, 35D, 35F; 35C, 35E, 35B, 35H); wherein the beamforming network (401, 402) further comprises: a power combiner/splitter (361, 362) configured to divide energy between the first power points associated with the first bias and the second associated power points with the second polarization; and, a phase change device to: control the phase change differences between i) the first phase centers of the first power points of the array elements (31) in one of the at least two columns with ii) the first centers phase of the first supply points of the arrangement elements (31) in a different one of the at least two columns; and, controlling the phase shift differences between i) the second phase centers of the second power points of the array elements (31) in one of the at least two columns with ii) the second phase centers of the second power points of the arrangement elements (31) in a different one of the at least two columns; and, wherein each of the distribution networks is arranged to perform at least one of the following: connecting a respective one of the at least four secondary connections (35A, 35G, 35D, 35F; 35C, 35E, 35B, 35H) of the training network beam (401, 402) with the first feed points of the at least two groups of array elements (31); connect a respective one of the at least four secondary connections (35A, 35G, 35D, 35F; 35C, 35E, 35B, 35H) of the beamforming network (401, 402) to the second feed points of the at least two groups of elements of arrangement (31).
    [0002]
    2. Antenna, according to claim 1, characterized in that the first phase centers and the second phase centers of at least one arrangement element (31) are arranged in two columns.
    [0003]
    3. Antenna, according to claim 1, characterized in that the first phase centers and the second phase centers of at least one arrangement element (31) are arranged in the same column.
    [0004]
    4. Antenna, according to claim 1, characterized in that a first distance between the first phase centers arranged in different columns is greater than 0.3 wavelengths; and a second distance between the second phase centers arranged in different columns is greater than 0.3 wavelengths.
    [0005]
    5. Antenna, according to claim 1, characterized in that the multiple arrangement elements (31) comprise at least a first set and a second set; each set comprising a subset of multiple array elements (31), the first phase centers and second phase centers being the array elements (31) of the first set of array elements and the first phase centers and second centers. phase values of the second set of array elements (31) are arranged in each of the at least two columns, respectively; the antenna further comprising at least two antenna ports, each of which is connected with array elements (31) in the first set and the second set, respectively, by means of feed networks.
    [0006]
    6. Antenna, according to claim 5, characterized in that the arrangement elements (31) are arranged in columns, and that each column comprises arrangement elements (31) of the first set interspersed with arrangement elements (31) of the second set.
    [0007]
    7. Antenna, according to claim 5, characterized in that the elements of arrangement (31) are arranged in multiple lines; each row comprising array elements (31) from the first set interspersed with array elements (31) from the second set.
    [0008]
    8. Antenna, according to claim 5, characterized in that the elements of arrangement (31) are arranged in multiple lines; each row comprising array elements (31) from the first set superimposed with array elements (31) from the second set.
    [0009]
    9. Antenna, according to claim 1, characterized in that the elements of arrangement (31) are arranged in at least three columns; each beamforming network (401, 402) further comprising at least six secondary connections.
    [0010]
    10. Antenna according to claim 1, characterized in that the power combiner/splitter (361, 362) in the beamforming network (401, 402) is a primary power combiner/splitter (38) connected with the respective antenna port (Port 1, Port 2) and configured to divide the energy between the first feed point and the second feed point of the connected array elements (31).
    [0011]
    11. Antenna according to claim 1, characterized in that the beamforming network phase change device (401, 402) comprises two phase change networks, including: i) a first change network of phase configured to control the difference of the phase change and also to divide the energy between the first supply point of the connected arrangement elements (31) with the first phase center arranged in different columns and ii) a second network of phase change configured to control the difference of the phase change and further to divide the energy between the second power point of the arrangement elements (31) connected with the second phase center arranged in different columns.
    [0012]
    12. Antenna according to claim 11, characterized in that each phase change network comprises an integrated phase change and power division device.
    [0013]
    13. Antenna according to claim 11, characterized in that each phase change network comprises a secondary power combiner / divider (362) configured to power the first power point or the second power point of the power elements. connected arrangement (31) having the first phase center or the second phase center, respectively, arranged in the same column, by means of a phase switch.
    [0014]
    14. Antenna according to claim 1, characterized in that each of the plurality of distribution networks is configured to exclusively connect a respective secondary connection of the beamforming network (401, 402) with the first points of supply of the connected arrangement elements (31) with the first phase centers arranged in a respective column, or, to exclusively connect a respective secondary connection of the beamforming network (401, 402) with the second supply points of the arrangement elements (31) connected with the second phase centers arranged in a respective column.
    [0015]
    15. Antenna according to claim 14, characterized in that the beam forming network (401, 402) is further configured to perform azimuth beam formation and each distribution network is further configured to perform the formation of the lifting beam.
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    同族专利:
    公开号 | 公开日
    US20120319900A1|2012-12-20|
    CN102742073B|2015-04-15|
    US9768494B2|2017-09-19|
    EP2534728A1|2012-12-19|
    JP2013519276A|2013-05-23|
    CN102742073A|2012-10-17|
    JP5584783B2|2014-09-03|
    KR101665158B1|2016-10-11|
    BR112012019194A2|2018-03-27|
    WO2011095184A1|2011-08-11|
    US10700418B2|2020-06-30|
    KR20120128621A|2012-11-27|
    US20180069302A1|2018-03-08|
    MX2012008424A|2012-08-15|
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    法律状态:
    2019-01-15| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-02-04| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-04-13| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-06-22| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 08/02/2010, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, , QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/EP2010/000756|WO2011095184A1|2010-02-08|2010-02-08|An antenna with adjustable beam characteristics|
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