• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An antenna system includes a substrate having an antenna radiating element (100) and a ground conductor (200) disposed on the substrate, the ground conductor being further characterized by a plurality of ground resonators (210,220,230), wherein a length associated with each of the mass resonators increases as the ground resonators move away from the antenna radiating element. A coaxial cable (500) is further routed around the antenna system to configure the coaxial cable as an additional ground resonator associated with the antenna system. The resulting antenna provides broadband performance between 700 MHz and 2700 MHz with improved performance compared to conventional antennas.
    公开号:FR3043498A1
    申请号:FR1661001
    申请日:2016-11-14
    公开日:2017-05-12
    发明作者:Jason Philip Dorsey
    申请人:Taoglas Group Holdings Ltd；
    IPC主号:
    专利说明:

    FLEXIBLE POLYMER ANTENNA HAVING MULTIPLE MASS RESONATORS
    TECHNICAL FIELD [1] The present invention relates to antennas for wireless communications; and more particularly, an antenna fabricated on a flexible polymeric substrate, the antenna comprising: a radiator and a ground conductor forming a plurality of ground resonators for providing high performance in a wide bandwidth.
    PRIOR ART [2] There is a continuing need for improved antennas, in particular flexible antennas, having a flexible configuration, to be placed on curved surfaces of various products, and which are able to agree on wide bands (for example: the 700 MHz-2700 MHz range.). ABSTRACT
    Technical problem [3] There is a need for an antenna capable of having multiple resonant frequencies in a wide band, for example between 700 MHz and 2700 MHz, in particular an antenna of this type which is capable of being deformed around a curved surface of a device. Problem Solving [4] After many tests and experiments, the antenna architecture described here was discovered, which provides efficient signaling at multiple resonant frequencies in a very wide band between 700 MHz and 2700 MHz . The performance of the described antenna exceeds that of conventional antennas and is further adapted to a flexible substrate and is configured to deform around a curved device surface for integration with a plurality of host devices.
    Beneficial Effects [5] In addition to broadband performance, the flexible polymer substrate provides the ability to deform the antenna around a curved surface of a device. When curved, the antenna continues to perform well in broadband.
    BRIEF DESCRIPTION OF THE DRAWINGS
    [6] Figure 1 shows an antenna system having multiple ground resonators, the antenna system including a radiating element positioned on a substrate, and a ground conductor positioned on the substrate adjacent to the radiating element. antenna, and the ground conductor comprising multiple resonant portions.
    [7] Figure 2 shows a cross-section of the antenna system (not shown in scale).
    [8] Figure 3 further shows the ground conductor and multiple resonant portions associated therewith.
    [9] Figure 4 shows a plot of the feedback loss generated by the antenna system of Figures 1-3.
    [10] Figure 5 shows a plot of the efficiency of the antenna system of Figures 1-3.
    [11] Figure 6 shows a plot of the peak gain associated with the antenna system of Figures 1-3.
    DESCRIPTION OF EMBODIMENTS
    [12] In various embodiments, an antenna is described which comprises: a substrate, an antenna radiating element disposed on the substrate, and a ground conductor, the ground conductor comprising: a ground plate, a first resonator a second ground resonator, and a third ground resonator; wherein the ground conductor surrounds the antenna radiating element on both sides thereof and provides multiple resonant frequencies forming a broadband response.
    [13] The antenna radiating element of the antenna system (the one which is fed by the central element of the coaxial cable) is known to function satisfactorily in other concepts, provided that the ground plane is big enough. A motivation of the present antenna concept is to improve the ground conductor of the antenna system so that it operates with a flexible substrate and to obtain a sufficient output in the smallest possible form. In addition, the ground conductor is configured to allow the shielding of the cable and its end connection to act as an extension of the ground plane.
    [14] Modern cellular applications, including 3G and 4G, often require the combination of high efficiency and small size in a large set of bands in the 700-2700 MHz range. The cable-fed flexible polymer antenna system is a commonly used embodiment of antennas for this market. It is often difficult to integrate such antennas compact devices without degradation of the return loss (and therefore the yield) due to the proximity of metal objects located at a short distance or unsuitable routing of the cable.
    [15] The present invention presents a novel antenna architecture having acceptable efficiency in a very small form by means of a known antenna radiating element and a single multi-section wrap-around conductor which is virtually extended by the power cable, The structure has been designed to concentrate the efficiency in the frequency bands at the places where it is necessary at the expense of the frequencies for which this output is not necessary.
    [16] It is difficult to design a small antenna that functions effectively in all the modern cellular bands used.
    [17] On typical quasi-cable-fed dipoles, the mass is often too small for stable operation and the cable shield is used to provide a ground conductor. This type of cable mass is not ideal because it does not allow to implement a resonant element.
    [18] For a small antenna, in order to obtain high yields at low frequencies in the wide range of 700 MHz - 960 MHz, it has been discovered that the use of multiple wrapping mass resonators, including size gradually increases outward, worked satisfactorily. In addition, thanks to multiple ground resonators, the cable shield can act as the last resonator structure for the lowest frequency required.
    [19] It is known from experience that covering the antenna radiating element with a copper ribbon leads to low band performances which are not so satisfactory but which remain marginal, and poor performance in high bands. It is also known that by covering the conductor with a copper ribbon, the performance in low bands is non-existent and the performances in high bands are not so satisfactory but marginal. Therefore, it is necessary to implement the proposed pattern formation on the ground conductor, not a simple conductive sheet having the same size.
    [20] A single dipole would require a length of about 210 mm to operate at 700 MHz.
    [21] With the antenna architecture described, we measure high efficiencies up to 650 MHz within a 58 mm x 67 mm space. Therefore, it is possible to obtain better yields with a much smaller size.
    [22] Moreover, by forming the antenna system on a flexible substrate, it is possible to adapt the shape of the antenna system to any surface, so as to mount the antenna, or it is possible to bend the antenna. antenna one or more times.
    [23] The antenna has two main subsections: the antenna radiator and the ground conductor. The ground conductor is new in the sense that it consists of multiple sub-elements, each of which progressively grows when moving away from the antenna radiating element, so that the last element is in fact the shielding of the cable and its connection, that is to say generally, the mass of a PCB (circuit board). This leads to a known and appropriate way of routing the cable.
    [24] In one aspect, the antenna combines the antenna radiating element with a new type of ground conductor composed of multiple sub-elements (here, three) that wrap around the antenna system and progressively enlarge as the sub-elements (resonators) move closer to the outer periphery of the antenna system. The shielding of the cable plays the role of final element because of the routing.
    [25] In another aspect, it is proposed to use a coaxial mini-cable as an antenna feeding technique.
    [26] According to yet another aspect, it is proposed to manufacture the antenna structure on a flexible substrate, such as a polyimide substrate (Kapton ®), which offers the advantage of allowing the attachment of the antenna to any curved surface, or bend the antenna multiple times.
    Example 1 [27] Referring now to the drawings which illustrate an example, Fig. 1 shows an antenna system having multiple ground resonators, the antenna system including a radiating element (100) positioned on a substrate ( 550), and a ground conductor (200) positioned on the substrate adjacent to the antenna radiating element, the ground conductor comprising multiple resonant portions (210; 220; 230). A coaxial cable (500), such as a coaxial micro-cable, includes the central element which is soldered to a power supply (402) of the antenna radiator (100). The central element of the coaxial cable is generally separated from a ground element by an insulator disposed therebetween. The ground element (401) of the coaxial cable is soldered to the ground conductor (200) as illustrated. The coaxial cable (500) is then routed in the conventional manner; that is to say around a periphery of the antenna system. In addition, the cable generally includes a connector (501) for connection to a radio circuit.
    [28] As shown in Figure 1, the antenna system comprises a radiating element (100) and a ground conductor (200); wherein the ground conductor is configured to surround 11 antenna radiating elements on two sides thereof. In addition, the ground conductor includes a plurality of sub-elements (also called "resonators"), the length of each resonator increasing as the distance from the resonator to the radiating element increases. The routed cable is configured to act as an additional resonator, and has a length greater than that of each of the other resonators of the ground conductor.
    [29] Figure 2 shows a cross section of the antenna system (not shown in scale). The antenna system includes a flexible polymeric substrate (604), such as a polyimide substrate, or any substrate having a flexible or bendable body. A solder mask layer (603) is applied to a lower face of the flexible polymer substrate. An adhesive layer (602) is applied to a lower face of the solder mask layer as shown. A liner (601) is applied to the adhesive layer, as illustrated, to form the bottom surface of the antenna system. On the other hand, a copper layer (605) according to the concept shown in FIG. 1 is disposed on an upper surface of the flexible polymer substrate (604) as illustrated. Conductive pads (607a; 607b) and a solder mask (606a; 606b) are each applied over the copper layer (605) to thereby form an upper surface of the antenna system. Although the illustrated example allows the skilled person to implement and exploit the invention, it will be noted that certain variants can be implemented without departing from the scope of the invention.
    [30] Fig. 3 further shows the ground conductor and multiple resonators associated therewith. In the present case, the ground conductor includes a ground plate (201) positioned adjacent to the antenna radiating element (100).
    [31] Descending along a first edge of the antenna system as illustrated, a first ground resonator (210) extends horizontally from the edge along a first body portion ( 211), and is bent at right angles to a first terminal portion (212).
    [32] A second ground resonator (220) extends from the first edge of the antenna system as illustrated, the second ground resonator having a second horizontal body portion (221), a second portion of vertical body (222), and a second terminal portion (223). The second mass resonator has a length greater than that of the first ground resonator.
    The second ground resonator is also positioned along the ground conductor at a distance that is greater than that of the first ground resonator. The second vertical body portion (222) of the second ground resonator (220) is aligned parallel to the terminal portion (212) of the first ground resonator, a first gap extending therebetween.
    [33] A third ground resonator (230) extends from the ground conductor (200) forming a third horizontal body portion (231) which is oriented parallel to the second horizontal body portion (221) of the second conductor mass, and a third vertical body portion (232) extending perpendicularly to the third horizontal body portion (231). The third mass resonator has a length that is greater than that of each of the first and second ground resonators, respectively. In addition, the third ground conductor is positioned at a distance from the radiating element (100) which is greater than that of the first and second ground resonators, respectively. A second gap is formed between the second ground resonator and the third ground resonator. The ground conductor (200) further includes a severing portion (241) extending between the first edge and the third ground resonator at an angle of less than ninety degrees.
    [34] Referring again to FIG. 1, the cable (500) has a length greater than that of each of the first to third ground resonators, and is positioned further away from the radiating element (100) by comparison to each of the first to third mass resonators.
    [35] As used herein, the terms "horizontal", "vertical", "parallel" and / or "perpendicular", or variations thereof, such as "horizontally", etc., are each used in reference to the specific orientation, as shown in the corresponding illustrations.
    [36] Fig. 4 shows a plot of the feedback loss generated by the antenna system of Figs. 1-3. The antenna has resonances between 700 MHz and 2700 MHz, as shown.
    [37] Figure 5 shows a plot of the efficiency of the antenna system of Figures 1-3.
    [38] Figure 6 shows a peak gain plot associated with the antenna system of Figures 1-3.
    Industrial Applications [39] The present antenna system described herein provides useful performance and performance in the wideband between 700 MHz and 2700 MHz, which can be used in cellular communications, among other communications networks.
    Numeric reference list (100) radiating antenna element (200) ground conductor (201) ground plate (210) first ground resonator (sub-element) (211) first body portion (212) first terminal portion (220) second mass resonator (sub-element) (221) second horizontal body portion (222) second vertical body portion (223) second terminal portion (230) third mass resonator (sub-element) (231) third horizontal body portion (232) third vertical body portion (241) severing portion (401) ground member (402) power supply (500) coaxial cable (501) connector (550) substrate (601) liner (602) adhesive (603) solder mask layer (604) flexible polymer substrate (605) copper layer (606a; 606b) solder mask (607a; 607b) conductive pads
    权利要求:
    Claims (15)
    [1" id="c-fr-0001]
    An antenna system, comprising: a radiating antenna element (100); and a ground conductor (200); the antenna radiating element being positioned adjacent to the ground conductor; characterized in that the ground conductor comprises: a plurality of sub-elements (210,220,230), each sub-element being configured to produce a distinct resonance.
    [2" id="c-fr-0002]
    The antenna system of claim 1, wherein the antenna radiating element and the plurality of sub-elements are each disposed on a flexible substrate.
    [3" id="c-fr-0003]
    The antenna system of claim 2, wherein the plurality of sub-elements comprises: a first ground resonator (210), a second ground resonator (220), and a third ground resonator (230).
    [4" id="c-fr-0004]
    The antenna system of claim 3, wherein the first ground resonator has a first length associated therewith.
    [5" id="c-fr-0005]
    The antenna system of claim 4, wherein the second mass resonator has a second length associated therewith, and wherein the second length is greater than the first length.
    [6" id="c-fr-0006]
    The antenna system of claim 5, wherein the third ground resonator has a third length associated therewith, and wherein the third length is greater than each of the first and second lengths.
    [7" id="c-fr-0007]
    Antenna system according to any one of the preceding claims, further comprising a coaxial cable (500) coupled to a power supply of the antenna radiating element and further coupled to the ground conductor; the coaxial cable being positioned around a periphery of the antenna system.
    [8" id="c-fr-0008]
    The antenna system of claim 7, wherein the coaxial cable is configured to operate as a fourth ground resonator.
    [9" id="c-fr-0009]
    Antenna system according to claim 2, wherein the antenna radiating element is positioned at an angle of the flexible substrate.
    [10" id="c-fr-0010]
    Antenna system according to any one of the preceding claims, wherein the ground conductor is configured to surround two sides of the antenna radiating element.
    [11" id="c-fr-0011]
    The antenna system of claim 2, wherein the ground conductor extends along a first edge of the flexible substrate.
    [12" id="c-fr-0012]
    The antenna system of claim 11, wherein each of the first to third ground resonators extends from the first edge of the flexible substrate.
    [13" id="c-fr-0013]
    The antenna system of claim 12, wherein the first ground resonator comprises a first body portion (211) extending perpendicular to the first edge, and a first terminal portion (212) extending perpendicular to the first body part.
    [14" id="c-fr-0014]
    The antenna system of claim 13, wherein the second ground resonator comprises a second horizontal body portion (221) extending perpendicular to the first edge, a second vertical body portion (222) extending perpendicular to the second horizontal body portion, and a second terminal portion (223) extending perpendicular to the second vertical body portion.
    [15" id="c-fr-0015]
    The antenna system of claim 14, wherein the third ground resonator comprises a severing portion (241) extending from the first edge, a third horizontal body portion (231) extending from the portion of sectioning, and a third vertical body portion (232) extending perpendicularly to the third horizontal body portion.
    类似技术:
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    引用文献:
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    FR2869467A1|2004-04-23|2005-10-28|Amphenol Socapex Soc Par Actio|RF COMPACT ANTENNA|
    US7129904B2|2005-03-23|2006-10-31|Uspec Technology Co., Ltd.|Shaped dipole antenna|
    TWM284087U|2005-08-26|2005-12-21|Aonvision Technology Corp|Broadband planar dipole antenna|
    US7312756B2|2006-01-09|2007-12-25|Wistron Neweb Corp.|Antenna|
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    WO2009027763A1|2007-07-18|2009-03-05|Nokia Corporation|An antenna arrangement|
    TWI462395B|2008-10-09|2014-11-21|Wistron Neweb Corp|Embedded uwb antenna and portable device having the same|
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    DE102016121661B4|2015-11-11|2019-01-31|Taoglas Group Holdings Limited|Flexible polymer antenna with multiple earth resonators|DE102016121661B4|2015-11-11|2019-01-31|Taoglas Group Holdings Limited|Flexible polymer antenna with multiple earth resonators|
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    TWI731788B|2020-09-11|2021-06-21|宏碁股份有限公司|Mobile device|
    法律状态:
    2018-05-16| PLFP| Fee payment|Year of fee payment: 2 |
    2018-11-21| PLFP| Fee payment|Year of fee payment: 3 |
    2019-02-01| PLSC| Publication of the preliminary search report|Effective date: 20190201 |
    2020-05-01| RX| Complete rejection|Effective date: 20200324 |
    优先权:
    申请号 | 申请日 | 专利标题
    US201562254140P| true| 2015-11-11|2015-11-11|
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