• 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:
    1490918 Direction finder; aerials THOMSON-CSF 10 March 1975 [12 March 1974] 9925/75 Headings H4D and H4A A compact VHF or UHF radio direction finder comprises 2n aerial elements or terminals regularly arranged in a circle of diameter less than half the minimum envisaged received wavelength # m with opposite pairs of elements being simultaneously connected to a receiver in sequence round the circle to produce a directional lobe sweeping 360 degrees in azimuth. The input to the receiver is the received radio signal, amplitude modulated due to the rotation of the lobe, the modulation having a phase relative to the sweeping of the lobe indicative of the signal direction. If monopole elements are used and, e.g., if n= 3, Fig. 2, the diameter of the circle is # m /4, one element, the "back", e.g. B 4 , is directly connected to the receiver input 2 whilst the "front" element, e.g. B 1 , is connected to the input via #/2 phase delay Z 1 . Directions D 1 , D 2 , D 3 are scanned using the three successive positions of switch 10 with switch 11 in its shown position and D 4 , D 5 , D 6 are scanned using said three successive positions with switch 11 in its other position. Instead of n discrete elements, the aerial may comprise a closed top frusto-conical element 15, Fig. 4a, with n terminals being connected at spaced points on its base rim. The apex angle of the element may be 90 degrees, Fig. 4a, or 120 degrees, Fig. 5 (not shown), or, in an extreme, Fig. 5b (not shown), 180 degrees whereby the element becomes a disc. A diode switching network for the terminals is described, Fig. 6 (not shown), based on the arrangement of Fig. 2.
    公开号:SU912061A3
    申请号:SU752109236
    申请日:1975-03-11
    公开日:1982-03-07
    发明作者:Руссе Пьер；Сэн Ло Арман
    申请人:Томсон-Цсф (Фирма)；
    IPC主号:
    专利说明:

     (54) DIGITAL RADIO DIALER
    one
    This invention relates to radio direction finding.
    The on-board radio direction finder is known, which contains a multichannel antenna, a two-channel electronic switch, each channel of which has n inputs and one output, the first output of the electronic switch connected to the matched load, the second output connected to the receiver input, the output of which is four. The cut detector is connected to an indicator, as well as a generator of control signals, the output of which is connected to the control input of the electronic modulator Ql.
    However, the well-known direction finder has poor direction finding characteristics and low reliability.
    The chain of the invention is; Partitioning of the pelengation characteristics and reliability in terms of the location of the direction finder on the fusell of the same aircraft ..
    To do this, in an on-board radio direction finder containing a multi-channel antenna, a two-channel electronic switch, each channel of which has p inputs and one output, shei
    This first output of the electronic switch is connected to the matched load, the second output is connected to the input of the receiver, the output of which is connected to the indicator through the detector, as well as a generator of control signals whose output is connected to the control input of the electronic switch, antenna
    10 made in. view of a hollow truncated cone with an open large and closed small bases located above the conductive surface, with a diameter of the larger base, not exceeding half the minimum wavelength of the received signal and fitted around the perimeter of the large base with 2 rk clamps, while the clamps are electrically connected to the corresponding 20 static type electronic switch, the second output of the control signal generator is connected to the second input of the detector.
    FIG. 1 depicts a structural
    权利要求:
    Claims (2)
    [1]
    25 is an electrical circuit of the proposed direction finder; in fig. 2 shows an embodiment of the electronic switch in FIG. 3 and 4 are embodiments of antennas. The radio direction finder contains a multichannel antenna 1, a two-channel electronic switch 2, a receiver 3 detector 4, a generator 5 of control signals, an indicator 6. The switch (FIG. 2) is filled with a channel link, each of the channels has rv inputs and one output, with the first output., the switch is connected to a matched load connected to ground by the earth 7, and the second VElkhod is connected to the receiver 3. The switchboard also contains a double lO-position (in this case step 3) switch of channels 8 and a double dip switch $. The antenna (Fig. 3 and 4) is made in the form of a hollow truncated cone 10 with an open large and closed small bases located above the conductive surface 11, and provided around the perimeter of the large base 2 with clamps 12, while the clamps 12 are electrically connected to corresponding inputs of the electronic switch 2. In FIG. 3 shows a truncated cone (continuation of which gives an apex angle of 90 °, and FIG. 4 shows an apex angle of 120 ° and the antenna is protected by a fairing 1) The radio direction finder works as follows. The radio direction finder provides a rotating pattern for unfolding the plane with a hollow angular overlap, i.e. 360 °. The radiation pattern obtained at reception is the direction of the maximum radiation, i.e. a certain directionality. It may be in the form of a cardioid. different, each movement of the direction of maximum radiation from the previous one is carried out at an angle of 360 ° / 2n in accordance with the direction of rotation chosen in advance. After the 2nd nth movement, the diagram returns to its original position. The antenna 1 has 2n connecting clamps 12, which are evenly distributed over the perimeter of the large base of the truncated cone. Sequential angular displacements are achieved by switching the clamps 12 using an electronic switch
    [2]
    2. The signal from receiver 3 is received by n Detector 4, which produces a useful (. Received J signal corresponding to the magnitude of the angle formed by the direction of the detected transmitting station and the known direction taken as a reference point. The count is given by the generator 5 connected by the second input of the detector 4 and the useful signal is supplied to indicator B. A conventional VHF receiver or a super short wave receiver can be used as receiver 3. Switch 2 allows you to select two antenna clamps 1 each time to receive a rotating signal. The switch 2 has no moving parts and is controlled by the control signal generator 5. The circle diameter over which the clamps 12 are evenly distributed does not exceed half the minimum wavelength of the received signal. The static switch 2 provides a stepped angular displacement of the maximum axis radiation pattern of the directional direction by the same angle and in the same direction. The proposed direction finder is a device made without any moving elements and provides High reliability in operation. Invention On-board direction finder containing a multi-channel antenna, a two-channel electronic switch, each channel of which has n inputs and one output, the first output of the electronic switch connected to the matched load, the second output connected to the receiver input, the output of which through the detector is connected to the indicator, as well as a control signal generator, the output of which is connected to the control input of the electronic switch, characterized in that, in order to improve the direction finding characteristics and adezhnosti under conditions finder for locating the aircraft fuselage., the antenna is in the form. a hollow truncated cone with an open large and closed small bases located above the conductive surface, with a diameter of a large base not exceeding half the minimum wavelength of the received signal and fitted around the perimeter of the larger base with 2 n clamps, while the clamps are electrically connected to the corresponding electronic inputs switch of static type, the second output of the generator of control signals is connected to the second input of the detector. Sources of information taken into account in the examination 1. Patent QUA f 2962715, NCI 343-120, 29.11.60 (prototype).
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    类似技术:
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    GB1524571A|1978-09-13|Radio navigation system and scanning beam antenna
    GB1145194A|1969-03-12|A directional radio link
    US3854132A|1974-12-10|Radar systems
    US2244628A|1941-06-03|Antenna with steerable polarization characteristics
    同族专利:
    公开号 | 公开日
    FR2264290A1|1975-10-10|
    IT1032250B|1979-05-30|
    DE2510598A1|1975-09-18|
    DE2510598B2|1977-06-08|
    FR2264290B1|1979-07-06|
    GB1490918A|1977-11-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4338606A|1978-12-21|1982-07-06|Sony Corporation|Antenna system with variable directivity|
    JPH0223085B2|1982-12-14|1990-05-22|Taiyo Musen Co Ltd|
    JPH0254909B2|1984-01-13|1990-11-22|Taiyo Musen Co Ltd|
    GB8426245D0|1984-10-17|1984-11-21|British Gas Corp|Microwave reflection survey equipment|
    GB8426246D0|1984-10-17|1984-11-21|British Gas Corp|Microwave reflection survey equipment|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7408255A|FR2264290B1|1974-03-12|1974-03-12|
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