WO1997033342A1 - Antenne reseau plan - Google Patents

Antenne reseau plan Download PDF

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Publication number
WO1997033342A1
WO1997033342A1 PCT/JP1996/000572 JP9600572W WO9733342A1 WO 1997033342 A1 WO1997033342 A1 WO 1997033342A1 JP 9600572 W JP9600572 W JP 9600572W WO 9733342 A1 WO9733342 A1 WO 9733342A1
Authority
WO
WIPO (PCT)
Prior art keywords
circularly polarized
waveguides
array antenna
planar array
waveguide
Prior art date
Application number
PCT/JP1996/000572
Other languages
English (en)
Japanese (ja)
Inventor
Naohisa Goto
Makoto Ando
Motonobu Moriya
Makoto Ochiai
Original Assignee
Nippon Steel Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corporation filed Critical Nippon Steel Corporation
Priority to PCT/JP1996/000572 priority Critical patent/WO1997033342A1/fr
Priority to CA002217730A priority patent/CA2217730A1/fr
Publication of WO1997033342A1 publication Critical patent/WO1997033342A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0037—Particular feeding systems linear waveguide fed arrays
    • H01Q21/0043—Slotted waveguides
    • H01Q21/005—Slotted waveguides arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
    • H01Q3/04—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying one co-ordinate of the orientation

Definitions

  • the present invention relates to a planar array antenna and a device including the antenna, and more specifically, to a planar array antenna suitable for receiving satellite broadcasting using both left-handed circularly polarized light and right-handed circularly polarized wave and an antenna thereof.
  • FIG. 14 is a top view thereof.
  • FIG. 14 is a top view thereof.
  • the power supply waveguide 1 has a power supply opening 2 and a branch opening 3.
  • a plurality of radiating waveguides 1 arranged at right angles to the feeding waveguide 1 and parallel to each other are connected to the feeding waveguide 1 via the branch openings 3.
  • the radiation waveguide 11 is provided with a plurality of circularly polarized cross slots 12.
  • the power fed from the feed aperture 2 passes through the feed waveguide 1, is distributed to the radiating waveguide 11 through the branch aperture 3 in phase, and is circularly polarized through the circular polarization cross slot 12. Radiated as Regarding the rotation direction of the circularly polarized wave, when the cross slot 12 is on the right side of the transmission direction of the radio wave of the radiation waveguide 11, the left-handed circularly polarized wave is obtained.
  • left-handed circularly polarized light is emitted.
  • the antenna shown in Fig. 14 can receive either left-handed or right-handed polarized light, but in the United States, etc., satellites use both left-handed and right-handed polarized waves. It provides broadcasting services, and it is no longer possible to use an antenna that receives only a single circularly polarized wave.
  • the document “Slot design of dual-polarized radial-radio slot antenna”, 1992 IEICE Spring Conference B-49 (hereinafter referred to as Reference 2) Discloses an antenna capable of transmitting or receiving both left-handed and right-handed polarized waves.
  • this antenna it is possible to radiate both left-handed and right-handed circularly polarized waves by transmitting inward and outward cylindrical waves in the radial waveguide, which is a radiation waveguide. I have to.
  • the efficiency of the antenna disclosed in Reference 2 is only about 70% even if the slot design is optimized, which is low for practical use. Disclosure of the invention
  • an object of the present invention is to provide an antenna capable of transmitting or receiving both left-handed circular polarization and right-handed circular polarization with higher efficiency, and an apparatus including the antenna.
  • a planar array antenna is a plurality of first waveguides arranged side by side so that their tube axes are parallel to each other, each of which is circular.
  • a plurality of first waveguides having a plurality of slots for radiating or receiving polarized waves at predetermined positions; and a plurality of first waveguides each having a right angle to a direction of a tube axis of the plurality of first waveguides.
  • Two second waveguides each having a tube axis oriented in the direction, each of which is connected to both ends of the plurality of first waveguides via a branch opening, each of the second waveguides further including a feed opening.
  • each of the plurality of first waveguide slots has a power, a left-handed circularly polarized wave, and a power supply opening of the two second waveguides. Emit or receive both right-handed circularly polarized radio waves.
  • the slot for radiating or receiving the circularly polarized wave is provided at each tube axis of the first waveguide. If they are arranged with a predetermined offset from each other, power is supplied to both sides of the first waveguide via the two second waveguides, so that the left-handed circularly polarized wave and the right-handed circular It is possible to emit both polarizations. Conversely, it is also possible to receive both left-handed and right-handed polarized waves from the same slot.
  • planar array antenna includes a plurality of planar lines arranged in parallel with each other, and the plurality of planar lines arranged at a predetermined interval from the plurality of planar lines.
  • a conductor plate having a plurality of slots at predetermined positions for radiating or receiving circularly polarized waves; and two power distribution circuits connected to both ends of the plurality of planar lines, respectively.
  • the radio wave of both left-handed circular polarization and right-handed circular polarization is radiated or received from each of the slots of the conductor plate via two power distribution circuits.
  • planar line such as a strip line or a microstrip line and a slot provided in a conductor case covering the planar line are used without using a waveguide.
  • a planar line such as a strip line or a microstrip line and a slot provided in a conductor case covering the planar line are used without using a waveguide. The same operation is made possible by using a mouse.
  • the planar array antenna according to the present invention has a high efficiency of 80% or more by optimizing the electrical coupling between the waveguide or the planar line and the slot, unlike the antenna disclosed in Reference 2. .
  • the antenna device for receiving satellite broadcasts using the planar array antenna according to the present invention is a plurality of first waveguides arranged side by side so that the tube axes are parallel to each other.
  • the plurality of first waveguides each having a plurality of slots at predetermined positions for receiving both the first circularly polarized wave and the second circularly polarized wave; and
  • a second waveguide having a plurality of guide portions for combining the first circular polarization received by the first waveguide of the second waveguide and transmitting the combined first circular polarization;
  • IF intermedate frequency
  • Lymph Isseki Lymph Isseki and means.
  • the antenna device according to the present invention as described above, it is possible to select one of the left-handed circularly polarized wave and the right-handed circularly polarized wave received by the planar array antenna and supply the selected one to the tuner.
  • FIG. 1 is a perspective view of a planar array antenna according to a first embodiment of the present invention
  • FIG. 2 is a plan view of a planar array antenna according to a first embodiment of the present invention
  • FIG. FIG. 4 is a plan view of a planar array antenna according to a second embodiment of the present invention.
  • FIG. 4 is a graph showing a relationship between transmitted energy and antenna efficiency in the planar array antenna of the present invention.
  • FIG. 5A is a plan view of a planar array antenna according to a third embodiment of the present invention.
  • FIG. 5B is a sectional view of the planar array antenna according to the third embodiment of the present invention.
  • FIG. 6 is a schematic diagram of an antenna device according to a fourth embodiment of the present invention
  • FIG. 7 is a schematic diagram of an antenna device according to a fifth embodiment of the present invention
  • FIG. FIG. 10 is a schematic diagram of an antenna device S according to a sixth embodiment
  • FIG. 9 is a schematic diagram of an antenna device according to a seventh embodiment of the present invention
  • FIG. 10 is an eighth embodiment of the present invention.
  • FIG. 11A is a schematic view of an antenna device according to the present invention.
  • FIG. 11A is a plan view showing the entire antenna device according to the present invention.
  • FIG. 11B is a side view showing the entire antenna device according to the present invention.
  • FIG. 12A is a plan view of an antenna device according to a ninth embodiment of the present invention
  • FIG. 12B is a cross-sectional view of the antenna device according to the ninth embodiment of the present invention.
  • FIGS.A and 13B are plan views of a planar array antenna according to a tenth embodiment of the
  • FIG. 14 is a plan view of a conventional planar array antenna for single circular polarization.
  • FIG. 1 is a perspective view of a planar array antenna according to a first embodiment of the present invention
  • FIG. 2 is a plan view of the planar array antenna shown in FIG.
  • the power supply waveguide 1A has a power supply opening 2A and a branch opening 3A serving as guide means
  • the power supply waveguide 1B has a power supply opening 2B and a branch opening 3B serving as guide means.
  • Connection terminals 4A and 4B for connecting to an external circuit via a cable are provided near the lined electrical openings 2A and 2B.
  • the connection terminals 4A and 4B are composed of a connector part for connecting a cable and a power supply pin part for supplying power to the antenna.
  • the cold side of the connector part of the connection terminals 4A and 4B is connected to the housing of the planar array antenna, and the hot side is connected to the feed pin part. Therefore, when the cable is connected, the cold side of the cable is connected to the housing of the flat array antenna, and the hot side is connected to the feed pin.
  • the plurality of radiation waveguides 11 arranged in parallel to each other are connected at right angles to the feed waveguides 1A and 1B via branch openings 3A and 3B, respectively. These radiation waveguides 11 are provided with a plurality of cross slots 12 for radiating circularly polarized waves.
  • the radio wave fed from the feed aperture 2A propagates through the feed waveguide 1A, is distributed in phase to the multiple radiating waveguides 11 through the branch aperture 3A, and is distributed from the cross slot I2. Radiated as right-handed circularly polarized light.
  • the radio wave fed from the feed aperture 2B propagates through the feed waveguide 1B, is distributed in the same phase to a plurality of radiation waveguides 11 via the branch aperture 3B, and has the same cross slot. It is emitted as left-handed circularly polarized light from G12.
  • slots are provided at intervals of the waveguide wavelength of the waveguide to radiate radio waves to the front surface of the antenna.
  • Using a broadsided array antenna greatly reduces efficiency. This occurs because the waveguide wavelength of the waveguide is larger than the free space wavelength, that is, if the slot spacing is larger than the free space wavelength; Wide angle constant This is because a phenomenon called a grating lobe appearing in the pattern occurs.
  • the radiation direction of the radio wave is tilted not in front of the antenna, but in a direction that is greatly inclined in the direction of the tube axis of the feeding waveguide. Therefore, it is impossible to receive both right-handed and left-handed polarized waves with the antenna fixed because the beam directions of right-handed and left-handed polarized waves are tilted in opposite directions. It is.
  • FIG. 3 is a plan view of a planar antenna according to a second embodiment of the present invention. The difference from the first embodiment is that the position of the slot is shifted between the adjacent radiation waveguides 11 and the adjacent radiation waveguides 11 are fed in opposite phases.
  • a radiation waveguide can be constructed by laminating a plate-like structure and a flat plate with an open slot, and the close contact between the two is not always required.
  • a leaky wave array antenna may be used, as opposed to the case of FIG. Since the radio waves radiated from the waveguide are out of phase and weaken each other, no radiation beam is formed and the device does not operate. Therefore, we consider a broadsided array antenna.
  • the radiation cross-slots 12 are arranged along the waveguide axis of the radiation waveguide 11 at intervals of the guide wavelength, and the radiation cross-slots are arranged between adjacent radiation waveguides 11.
  • the wavelength in the waveguide of the radiation waveguide 11 1 is expressed by the following equation (2) when transmitted in the TE 10 mode, which is the fundamental mode.
  • planar array antenna according to the present embodiment is a broad-sided array antenna, its radiation direction can be made to match for right-handed circular polarization and left-handed circular polarization. Therefore, it is not necessary to rotate the antenna when switching the received signal from one of the right-handed circular polarization and the left-handed circular polarization to the other.
  • planar array antenna according to the first or second embodiment has a sufficiently high efficiency for practical use.
  • the efficiency of a planar array antenna is maximized when all radiation slots radiate radio waves with the same amplitude. In this case, this is achieved by adjusting the length and position of the slot along the pipe axis direction. Therefore, the theoretical efficiency is 100%.
  • the radiation waveguide in the planar array antenna according to the present invention, the radiation waveguide
  • slot radiation Since 1 is fed from both sides, if slot radiation is designed to be uniform with respect to power supply from one side, slot radiation will have a large slope distribution with respect to power supply from the other side, and efficiency will increase. Is significantly reduced.
  • radio waves are radiated from each slot at a fixed rate, and the remaining energy passes through the radiation waveguide 11 It is absorbed by the lined electric waveguide on the other side that is not.
  • FIG. 4 is a graph showing the result of calculating the antenna efficiency by changing the ratio of the transmitted energy. This transmitted energy is lost, but when this loss is about 8%, the maximum efficiency of the antenna is about 81%. This efficiency is higher than the radial line slot antenna shown in Reference 2 and the parabolic antenna currently in practical use, and is a value that can withstand practical use.
  • the reason that the planar array antenna according to the present invention can achieve higher efficiency than the antenna shown in Reference 2 is as follows.
  • Radial lineslot antennas emit right-handed and left-handed circularly polarized waves using waves that behave differently: inward and outward cylindrical waves transmitted in the radial waveguide for radiation. As a result, there is no condition that simultaneously increases the efficiency for both right-handed and left-handed circularly polarized waves.
  • the antenna according to the present invention since a radiation waveguide having a uniform cross section such as a rectangular waveguide is used, the waves propagating in either direction in this waveguide are exactly the same. Indicates behavior. Therefore, by arranging the slots almost symmetrically about the midpoint of the radiation waveguide, the conditions for the maximum efficiency for each of right-handed circular polarization and left-handed circular polarization are almost the same, which is high. Efficiency is obtained.
  • FIGS. 5A and 5B show a planar array antenna using a strip line as a third embodiment.
  • FIG. 5A is a plan view
  • FIG. 5B is a cross-sectional view taken along line AA shown in FIG. 5A.
  • the strip line includes a plurality of radiating lines 31 parallel to each other, and distribution circuits 21A and 21B for supplying signals to the radiating lines 31 from both sides. Further, connection terminals 24A and 24B for connecting these distribution circuits 21A and 21B to an external circuit are provided.
  • a plurality of circularly polarized radiation slots 32 each having a non-parallel linear slot aperture are formed in a conductor plate 33 opposed to the radiation line 31.
  • the signal applied to the connection terminal 24 A passes through the distribution circuit 21 A and is supplied to the radiation lines 31 in phase with the same phase. Radiated as On the other hand, the signal applied to the connection terminal 24 B is radiated from the same circularly polarized radiation slot 32 as left circularly polarized light.
  • the cross slot and the non-parallel slot are shown as examples of the circularly polarized radiation slot.
  • the present invention can be implemented with slots of other shapes. it is obvious.
  • the shape of the feeding waveguide or the distribution circuit is not limited to the above-described embodiment as long as the feeding of the radiation waveguide or the radiation line can be performed in parallel.
  • a planar array antenna that can radiate both right-handed and left-handed circularly polarized waves even if a strip dipole that is electromagnetically complementary to the slot is used. Can be realized.
  • FIG. 11A A plan view showing the entire antenna device is shown in FIG. 11A, and a side view is shown in FIG. 11B.
  • the radome serving as the cover is removed in Fig. 11A, and the cut is centered on the rhomb in Fig. 11B.
  • Reference numeral 76 denotes a rotation-side circuit unit.
  • the elevation angle of the planar array antenna 41 is adjusted by an EL driving section 77 and an EL motor 78.
  • the rotating section 71 has a slip ring for transmitting a power supply and a control signal to the rotating circuit unit 76, the EL motor 78, and the converters 42A and 42B. These elements are mounted on a base plate 79 and covered by a radome 80.
  • FIG. 6 is a schematic diagram of an antenna device according to a fourth embodiment of the present invention.
  • This device is connected to a planar array antenna 41 similar to that shown in the first embodiment, which is rotatably mounted on the roof of a car or the like, and connected to the antenna via connection terminals 4A and 4B, respectively.
  • Converters 42 A and 42 B, and DC cut capacitors 43 A and 43 B respectively connected to the converters, and a rotary coupling that is electrically equivalent to the capacity.
  • a tuner 45 is a tuner 45.
  • a DC power supply 49 power two switch circuits 48 A and 48 B, one of which is turned on by the control circuit 46, resistances 47 A and 47 B for preventing interference, and a first 1 B Slip rings and the like provided on rotating section 71 shown in the figure are connected to converters 42A and 42B via the respective slip rings.
  • the converters 4 2 A and 4 2 B convert the RF (rad iof requency) signal of the satellite broadcast from the antenna 41 1 to the IF (intermidiate frequency) signal.
  • IF intermidiate frequency
  • the IF signal output from one of the converters 42 A and 42 B to which the DC voltage is supplied is input to the tuner 45, so that the desired circular polarization is obtained.
  • the number of capacitors can be reduced by forming the capacitors 43A and 43B with a rotary coupler instead of the rotary coupler 44.
  • a desired circularly polarized wave can be selected by providing a switch circuit in the signal line instead of the power supply line.
  • two IF signals output from converters 42A and 42B are connected to each other by a switch 52 via DC cut capacitors 51A and 51B, respectively. Selected and input to tuner 45.
  • DC voltage is supplied to both converters 42A and 42B.
  • a rotary coupler is not shown in this embodiment, the rotary coupler can be shared with the DC cut capacities 51A and 51B. Alternatively, a rotary coupler may be provided between the switch 52 and the tuner 45.
  • the signal line of the converter 42A or 42B doubles as the power supply line, but it is also possible to use a converter in which these lines are separate. It is.
  • IF signals output from the two converters 42 A and 42 B are combined and input to the tuner 45 via the rotary coupler 53. Only the IF signal output from one of the converters 42 A and 42 B to which the DC voltage is supplied is input to the tuner 45. In this way, a desired circularly polarized wave can be selected.
  • the IF signals output from the two converters 42A and 42B are taken out through the DC cut capacitors 51A and 51B, respectively. One of them is selected by the switch circuit 52 and input to the tuner 45. On the other hand, DC voltage is supplied to both converters 42A and 42B.
  • a rotary coupler is not shown in this embodiment, it can be shared with the DC cut capacitors 51A and 51B. Alternatively, a rotary coupler may be provided between the switch 52 and the tuner 45. In this way, it is possible to select a desired circularly polarized wave.
  • one of right-handed circular polarization and left-handed circular polarization was selected by electrical switching, but it could also be selected by changing the direction of the antenna. Is possible.
  • the antenna device according to the eighth embodiment of the present invention shown in FIG. 10 includes an antenna rotating means 63 for rotating a planar array antenna 41 attached to a roof of an automobile or the like.
  • the antenna rotating means 63 is a rotating part shown in FIG. 11B. 1, belt 72, reducer 73, motor 74, and motor drive circuit in fixed-side circuit unit 75.
  • two IF signals output from converters 42 A and 42 B to which a DC voltage is supplied are added by an adding means 61, and a tuner is provided via a rotary coupler 53. 4 Entered in 5.
  • the adding means 61 may be a simple connection of the outputs of the two converters 42A and 42B, if the circuit form permits.
  • the control circuit 62 in the fixed-side circuit unit 75 receives the polarization information indicating the desired circular polarization and the polarization information of the reception channel from the tuner 45, and determines whether or not they match. Is determined.
  • the control circuit 62 outputs a control signal to the antenna rotating means 63, and the antenna rotating means 63 determines the antenna 4 based on the control signal. Rotate 1 approximately 180 °. As a result, a desired circularly polarized wave can be selected from the right circularly polarized wave and the left circularly polarized wave.
  • FIG. 12A is a plan view, but the upper surface of the antenna having a plurality of slots (81 in FIG. 12B) is omitted for easy viewing.
  • FIG. 12B is a cross-sectional view taken along line BB in FIG. 12A.
  • the transmission section 83 is mounted below the antenna body 82, so that operation can be performed using only a single converter 85. That is, the power supply opening of the power supply waveguide as seen in the first embodiment is provided on the lower side, and the transmission section 83 acting as the waveguide is integrally formed or connected thereto. As a result, since the feed openings on both sides of the antenna are connected, it is possible to transfer energy between the right-handed circularly polarized wave and the left-handed circularly polarized wave to the single converter 85 via the connection terminal 84. Become.
  • FIGS. 13A and 13B are plan views, and the upper surface of the antenna having a plurality of slots is omitted for simplicity and clarity.
  • the inductive bosses 93 A and 93 B shown in FIG. 13A or the first The inductive walls 94 A and 94 B shown in FIG. 3B are provided to reduce reflection.
  • inductive bosses 93A and 93B can be installed after the antenna body 92 is made. In addition, if the inductive walls 94A and 94B are formed at the same time when the antenna main body 92 is formed, no post-processing is required.
  • connection terminals 4A and 4B are provided near the power supply openings 2A and 2B, respectively, and the exchange of radio waves between the antenna body and the converter is performed by a cable.
  • the present invention is not limited to this, and can be configured as follows.
  • the feed opening itself is set to the standard opening of the waveguide, for example, the standard WR-75.
  • the role of the power supply aperture is to act as an aperture through which radio waves pass.
  • connection terminals 4A and 4B are provided in the power supply section of the converter. Also in this case, no cable is required, and the role of the power supply opening is the same as when using the connection terminals 4A and 4B in the embodiment.
  • planar array antenna and the converter are connected to the connection terminal 4.
  • connection may be made without passing through these connection terminals.
  • planar array antenna according to the present invention is useful for transmitting or receiving both left-handed and right-handed polarized waves with high efficiency.

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Abstract

Plusieurs fentes pour la transmission ou la réception d'ondes électromagnétiques à polarisation circulaire sont ménagées en des points prescrits sur plusieurs guides d'ondes disposés pour que leurs axes soient parallèles les uns aux autres ou dans une ligne plane. Deux guides d'ondes sont prévus pour l'alimentation ou deux circuits de distribution sont connectés aux deux extrémités des guides d'ondes. Les ondes électromagnétiques sont acheminées jusqu'aux deux guides d'ondes ou jusqu'aux deux circuits de distribution et des ondes électromagnétiques polarisées en rotation dans le sens des aiguilles d'une montre ou dans le sens inverse des aiguilles d'une montre sont transmises à partir de chacune desdites fentes. Un dispositif utilisant une telle antenne est également.
PCT/JP1996/000572 1996-03-08 1996-03-08 Antenne reseau plan WO1997033342A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP1996/000572 WO1997033342A1 (fr) 1996-03-08 1996-03-08 Antenne reseau plan
CA002217730A CA2217730A1 (fr) 1996-03-08 1996-03-08 Antenne reseau plan

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/JP1996/000572 WO1997033342A1 (fr) 1996-03-08 1996-03-08 Antenne reseau plan
CA002217730A CA2217730A1 (fr) 1996-03-08 1996-03-08 Antenne reseau plan

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WO1997033342A1 true WO1997033342A1 (fr) 1997-09-12

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1122813A2 (fr) * 2000-02-04 2001-08-08 Hughes Electronics Corporation Terminal à réseau d'antennes à commande de phase pour constellations de satellites équatoriales
US7068733B2 (en) 2001-02-05 2006-06-27 The Directv Group, Inc. Sampling technique for digital beam former
WO2009084050A1 (fr) 2007-12-28 2009-07-09 Selex Communications S.P.A. Antenne à fentes et son procédé d'utilisation
CN106711576A (zh) * 2016-12-14 2017-05-24 西安电子科技大学 太阳能电池与缝隙天线集成一体化装置
CN110034386A (zh) * 2019-03-26 2019-07-19 北京遥测技术研究所 低轴比高效率可宽角扫描波导缝隙线阵天线
EP3771040A4 (fr) * 2018-05-14 2021-03-31 Mitsubishi Electric Corporation Dispositif d'antenne à réseau

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012210314A1 (de) 2012-06-19 2013-12-19 Robert Bosch Gmbh Antennenanordnung und Verfahren

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JPH02186703A (ja) * 1989-01-13 1990-07-23 Naohisa Goto 導波管のスロットアレイアンテナ
JPH03169103A (ja) * 1989-11-28 1991-07-22 Matsushita Electric Ind Co Ltd 円偏波受信装置
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JPH03174807A (ja) * 1989-12-04 1991-07-30 Dx Antenna Co Ltd 平面アンテナ
JPH04145704A (ja) * 1990-10-08 1992-05-19 Nec Corp 偏波共用アンテナ
JPH0522025A (ja) * 1991-07-12 1993-01-29 Tokyo Inst Of Technol 平行平板スロツトアンテナ
JPH0878948A (ja) * 1994-09-08 1996-03-22 Nippon Steel Corp 漏れ波導波管クロススロット・アレーアンテナ

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Publication number Priority date Publication date Assignee Title
JPS5496389A (en) * 1978-01-17 1979-07-30 Toshiba Corp Radar device
JPS6236906A (ja) * 1985-08-09 1987-02-17 Sharp Corp 二偏波共用アンテナシステム
JPH02159802A (ja) * 1988-12-13 1990-06-20 Nippon Steel Corp 受信アンテナの姿勢制御方法および装置
JPH02186703A (ja) * 1989-01-13 1990-07-23 Naohisa Goto 導波管のスロットアレイアンテナ
JPH03169103A (ja) * 1989-11-28 1991-07-22 Matsushita Electric Ind Co Ltd 円偏波受信装置
JPH03169104A (ja) * 1989-11-28 1991-07-22 Matsushita Electric Ind Co Ltd 円偏波・直線偏波アンテナ装置と送受信装置
JPH03174807A (ja) * 1989-12-04 1991-07-30 Dx Antenna Co Ltd 平面アンテナ
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1122813A2 (fr) * 2000-02-04 2001-08-08 Hughes Electronics Corporation Terminal à réseau d'antennes à commande de phase pour constellations de satellites équatoriales
EP1122813A3 (fr) * 2000-02-04 2004-03-10 Hughes Electronics Corporation Terminal à réseau d'antennes à commande de phase pour constellations de satellites équatoriales
US7339520B2 (en) 2000-02-04 2008-03-04 The Directv Group, Inc. Phased array terminal for equatorial satellite constellations
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