EP0489934B1 - Antenne plate - Google Patents

Antenne plate Download PDF

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Publication number
EP0489934B1
EP0489934B1 EP91921023A EP91921023A EP0489934B1 EP 0489934 B1 EP0489934 B1 EP 0489934B1 EP 91921023 A EP91921023 A EP 91921023A EP 91921023 A EP91921023 A EP 91921023A EP 0489934 B1 EP0489934 B1 EP 0489934B1
Authority
EP
European Patent Office
Prior art keywords
layer
antenna
grid
strips
cell
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP91921023A
Other languages
German (de)
English (en)
Other versions
EP0489934A4 (en
EP0489934A1 (fr
Inventor
Nikolai Ivanovich Voitovich
Boris Mikhailovich Andronov
Jury Fedorovich Borodin
Vitaly Nikolaevich Voronoi
Boris Zakharovich Katsenelenbaum
Evgenia Nikolaevna Korshunova
Viktor Nikolaevich Kocheshev
Ljudas Iozovich Pangonis
Mikhail Leonidovich Pereyaslavets
Arkady Motelevich Rasin
Nikolai Nikolaevich Repin
Alexei Nikolaevich Sivov
Andrei Dmitrievich Chuprin
Alexandr Dmitrievich Shatrov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NAUCHNO-ISSLEDOVATELSKY INSTITUT PO IZMERITELNOI TEKHNIKE
Original Assignee
NAUCHNO-ISSLEDOVATELSKY INSTITUT PO IZMERITELNOI TEKHNIKE
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 NAUCHNO-ISSLEDOVATELSKY INSTITUT PO IZMERITELNOI TEKHNIKE filed Critical NAUCHNO-ISSLEDOVATELSKY INSTITUT PO IZMERITELNOI TEKHNIKE
Publication of EP0489934A1 publication Critical patent/EP0489934A1/fr
Publication of EP0489934A4 publication Critical patent/EP0489934A4/de
Application granted granted Critical
Publication of EP0489934B1 publication Critical patent/EP0489934B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/064—Two dimensional planar arrays using horn or slot aerials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H01Q13/18—Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas

Definitions

  • the present invention relates to antenna technology and relates in particular to a surface antenna.
  • An antenna with a high amplification factor is required to receive signals from the satellites in the 12 GHz range.
  • Conventional mirror antennas meet this requirement.
  • the mirror antennas are quite extensive, their operating data deteriorate under the influence of rain, snow and wind.
  • the mast or any other attachment for antenna construction must be quite stiff and therefore quite extensive and heavy.
  • the exterior view of the mirror antenna does not match that of residential and public buildings.
  • the area antennas have a lower mass, the sail area depends to a lesser extent on the weather conditions.
  • the aesthetic correspondence of the area antennas with the exterior view of the residential and public buildings allows the former to be arranged on the walls of the buildings. Since the area antennas make it possible to implement the signal reception from a satellite through window glass, they can be installed directly in apartments.
  • a flat planar antenna which consists of a shielding layer in the form of a plate made of conductive material and of a radiation layer arranged above the former, which contains printed cavity emitters and a feed circuit made of conductive material, and an insulating insert between these layers (Marata Takao Ohmaru Kenji "A flat panel antenna with two-layer structure for satellite broadcasting reception ", NHK Lab. Note - 1989 - N 374, p. 1-12).
  • the printed cavity radiator in square form has a galvanic contact with strips of the supply circuit.
  • the emitters are at a distance of 0.7 to 0.9 ⁇ , where ⁇ is the wavelength.
  • An antenna based on a cavity resonator which contains a housing with an insulating filler, to which a waveguide is connected.
  • Uniformly distributed rectangular coupling openings are provided on one of the housing walls and are arranged in relation to a wave field excited within the housing in such a way that half-waves of the same polarity (DE, A, 3530647) arise in these coupling openings.
  • the known antenna does not allow a predetermined operating frequency range to be realized, to ensure a sufficiently small side lobe level, and has large dimensions in the direction orthogonal to the radiating antenna opening.
  • a surface antenna for receiving waves in the UHF range is known from a geostationary broadcasting satellite (US, A, 4851855) which contains a system of coplanar printed surface radiators which are located between two layers of synthetic resin. One of the surfaces of the radiator system is an antenna opening.
  • the antenna also contains a flat supply circuit, which is formed by strips of conductive material and is arranged between the two layers of synthetic resin, and a plan screen underneath. The system of radiators and the feed circuit, the feed circuit and the screen are separated from one another by intermediate layers.
  • the intermediate layers are executed in the antenna mentioned in the form of a frame made of metal, synthetic resin or wood.
  • the antenna feed network represents a suspended symmetrical stripline.
  • stripline By using the stripline, veluste can be avoided in the known antenna, which are caused by direct radiation from the conductors of the supply circuit, the radiation due to wave diffraction at T-branches, impedance transformers and from microstrip bends. Heat losses in the stripline dielectric are also reduced.
  • the known antenna also has high heat losses in the inner conductor and the shielding of the stripline due to a large extent of the strip, a large number of binary power dividers, impedance transformers, and line bends.
  • a surface antenna in the form of a multilayer structure is known, which is characterized by a shielding layer conductive material, a layer with a strip feed circuit and a radiation layer in the form of a plate with slot radiators is formed, which are electromagnetically coupled to the respective strips of the feed circuit.
  • the layers mentioned are separated from one another by intermediate layers of insulating material.
  • a transition is connected to the shielding layer and the strips of the feed circuit.
  • a galvanic coupling of the conductors of the layers with the feed circuit and the slot radiators is missing (Hirofumi Ishizaki "Sguare Antennas Edge Jinto BS Antenna Market” - JEI, 1990, Vol. 37, N 8, series N 432, pp. 63 to 64).
  • the antenna works as follows in transmission mode.
  • the signal from the transmitter is given to the input of the transition and further fed to the slot radiators via the feed circuit.
  • the slots are excited by the field of an electromagnetic wave that propagates along the stripline.
  • the known antenna also has high heat losses in the stripline and the shielding thereof due to a large extension of the feed line, a large number of binary power dividers, impedance transformers, line bends, and a large drop in power along the line, which cannot be reduced.
  • wave losses along the stripline with a good dielectric as filler for the line contribute to heat losses in the conductors - in the strip and the shielding of the line.
  • the invention has for its object to provide a surface antenna with such a design that allows a high directional factor in the receive wave range with a reduction in losses in the feed circuit of the antenna by reducing the number of slot radiators by using resonators with a to ensure partially permeable surface.
  • the surface antenna in the form of a multilayer structure the shielding layer made of conductive material separated from one another by insulating material intermediate layers, layer with a strip feed circuit and radiation layer in the form of a plate with slot radiators which are electromagnetically coupled to the respective strips of the feed circuit are formed and contains a junction connected to the shielding layer and the strips of the supply circuit, according to the invention additionally contains a grating with cavity cells and a layer arranged above and partially permeable to the reception wave range, the grating surface being made of conductive material and the grating on one Radiation layer plate forming a cavity through each of its cells is arranged, in which at least one slot radiator is arranged, the width and length of each cell exceeding the mean wavelength and the height of which deviates from half the mean wavelength by a size of approximately 0.02 to 0.07 of the wavelength.
  • the introduction of the resonator grating into the surface antenna allows the number of slot radiators to be significantly reduced while maintaining the directional factor of the surface antenna by transforming the field of the radiator in the field of the natural oscillation of the resonator, thereby eliminating the possibility of secondary diffraction maxima appearing in the directional diagram.
  • the reduction in the number of radiators makes it possible to simplify the supply circuit and to keep the losses in it lower.
  • the partially permeable layer is made in the form of a plate made of conductive material with coupling openings, the grating height having to be below half a medium wavelength.
  • the plate made of conductive material with the coupling openings as a partially permeable layer allows this layer to be produced by stamping.
  • the partially permeable layer prefferably be in the form of an insulating film with electrically insulated metal plates attached to it on both sides, the grating height having to be above half a medium wavelength.
  • the use of the insulating foil with the metal plates allows the semi-permeable layer to be produced using a printing technique.
  • the surface antenna is manufactured in such a way that the width and length of each cell is ⁇ 4 ⁇ , where ⁇ is the wavelength, while the number of slot radiators in each cell is two and they are parallel to a wall of the Cell at intervals of this lie, which are 1/4 and 3/4 of the length of the wall orthogonal to the slots.
  • the surface antenna is designed in such a way that in each grid cell there are additionally two slot radiators which are parallel to one another and orthogonal to the main slot radiators at intervals which are 1/4 or 3/4 of the length of the Slits are orthogonal wall, the lengths of the strips corresponding to each pair of the orthogonally arranged radiators should differ from one another by 1/4 ⁇ .
  • the antenna contains a shielding layer 1 (Fig. 1), a layer 2 with strips 3 of a supply circuit made of conductive material, a radiation layer 4, which is a conductive plate with a system of slot radiators 5, 6, intermediate layers 7 and 8, a grid 9 with Cavity cells 10, a partially permeable layer 11 with coupling openings 12, a cladding 13, if necessary a coaxial strip or a strip-waveguide transition 14.
  • a shielding layer 1 Fig. 1
  • a layer 2 with strips 3 of a supply circuit made of conductive material a radiation layer 4, which is a conductive plate with a system of slot radiators 5, 6, intermediate layers 7 and 8, a grid 9 with Cavity cells 10, a partially permeable layer 11 with coupling openings 12, a cladding 13, if necessary a coaxial strip or a strip-waveguide transition 14.
  • the shielding layer 1 is made of aluminum, copper, silver or other material with high electrical conductivity. To protect the conductive shielding layer 1 from corrosion, its surface can be covered with a 5 to 20 ⁇ m thick dielectric layer.
  • Layer 2 is produced in the form of a three-plate construction, which ensures corrosion protection for the conductors of the supply circuit.
  • the layer 4 is also produced in the form of a three-plate construction, the upper side of the conductive plate with the system of slot radiators 5, 6 being covered with a plastic film after the plate has been soldered or glued to the grid 9.
  • the intermediate layers 7, 8 are made of foam polystyrene or another dielectric with a low dielectric loss factor.
  • the grid 9 and the partially permeable layer 11 are made of a highly conductive material such as aluminum, copper, silver or a material similar in terms of electrical conductivity.
  • the grid 9 is either made of dielectric with a metal coating applied thereon or of a highly conductive material.
  • the layer 11 is produced in the form of a metal plate which is perforated by round or square openings 12.
  • the layer 11 (FIG. 2) is produced in the form of an insulating film with electrically insulated metal plates 15 attached to its two sides.
  • the conductive plate of layer 4 After assembly of the antenna, the conductive plate of layer 4, the grating 9 and layer 11 are galvanically contacted with one another over the entire line of contact.
  • the galvanic coupling is achieved either by soldering or gluing using a conductive adhesive.
  • the conductive plate of layer 4 together with the cells 10 of the grating 9 and the layer 11 forms nxm cavity resonators with a partially permeable surface, where n and m represent the numbers of the resonators in the direction of the axes x and y of a right-angled coordinate system in the plane of the antenna opening.
  • the length and the width of the cells 10 are selected in the order of magnitude of a few wavelengths as a function of the predetermined operating frequency range, for example of 4 ⁇ x 4 ⁇ .
  • the height of the grating 9 is chosen from the requirement that the sum of the height of the grating 9 and the half thickness of the layer 11 deviate from the half wavelength by a size which is proportional to the square root of the relative frequency range, for example by a size of 0.02 to 0.07 of the wavelength.
  • the choice of the number nxm of the resonators is realized on the condition of securing a predetermined antenna amplification factor.
  • the surface antenna according to the invention works as follows.
  • the signal from the transmitter (not shown in FIG.) Is applied to the input of the coaxial strip transition 14 (FIG. 1) and is subsequently fed to the slot radiators 5, 6 via the strips 3 of the feed circuit.
  • the slots are excited by the field of the electromagnetic wave that propagates along the stripline. Furthermore, the cavity resonators are excited by the slots, whereupon the electromagnetic energy is emitted through the layer 11.
  • the field structure in the resonator with a partially permeable wall strives asymptotically towards the field structure in the closed resonator with increasing quality.
  • the amplitudes of the higher vibrations are small compared to the amplitude of the fundamental vibration due to the filter properties of the resonator.
  • the antenna forms a directional diagram with a radiation maximum in the normal direction to the opening, while the radiation field has a circular polarization.
  • the additional introduction of the grating 9 and the layer 11 into the antenna makes it possible to arrange the slot radiators 5, 6 in the grating at much greater distances.
  • the analysis of the results of the numerical investigations using a strict solution to the electrodynamic task of excitation of a resonator antenna shows that when working in the 5% frequency band, the slots of the radiators 5, 6 on the conductive plate of the layer 4 from one another in the plane H at a distance of 4 ⁇ . Based on the results of the experimental investigations, it was found that the distance between the two slots in the plane E can be approximately twice the wavelength.
  • the antenna grating according to the invention nevertheless has no secondary diffraction maxima.
  • the additional introduction of the grating 9 and the layer 11 converts the antenna in the form of a grating of discrete radiators into an aperture antenna, in the opening of which the field strength is constant in the direction of one coordinate and in the direction of the other within the limits of each resonator after the cosine law changes.
  • the field distribution mentioned in the antenna opening ensures suppression of secondary interference maxima, which would occur at larger distances in the grating.
  • the value of the longitudinal attenuation of the wave in the line decreases.
  • the reduction in the number of circuit elements, the use of the gradual transitions make it possible to achieve a better adaptation in the circuit, which reduces the line losses which are due to multiple wave reflections from the inhomogeneities of the circuit.
  • the reduction the line length in the supply circuit reduces the line losses.
  • the antenna according to the invention has a higher frequency selectivity compared to the known flat antenna grids than the radiation elements of which slots, microstrip lines with bends, dipoles, microstrip emitters, horn radiators are used. In connection with this, the interference with signal reception from the satellite for a direct television broadcast outside the working frequency band is reduced.
  • the proposed antenna offers an advantage in comparison to the mirror antennas currently used for systems for direct television broadcasting in terms of a constructive and aesthetic correspondence with the interior of the apartments, with the exterior view of the residential and public buildings, has a much smaller size in Wave beam direction.
  • the plate of the layer 4 has two rows of the two radiators 5 and 6 in each row of orthogonally arranged slots, as shown in FIG. 3 is on.
  • the internal dimensions of the cell 10 of the grid 9 are 95x95 mm the same.
  • the slots are located in points with the coordinates A (-47.5; 0); B (47.5, 0); C (0; 47.5); D (0; -47.5).
  • the wall height of the grid 9 is 11.7 mm.
  • the layer 11 is 1 mm thick by punching Copper plate with the formation of square openings 12 measuring 7.5x7.5 mm.
  • the hole spacing in the direction of the two coordinates is 11.5 mm.
  • the supply circuit is based on a symmetrical strip line.
  • the width of the strip 3 is 3.8 mm, the thickness 0.018 mm.
  • the height of the stripline is 3 mm.
  • the intermediate layers 7 and 8 are made of foam polystyrene.
  • the dielectric constant of the foam polystyrene is 1.13 and its dielectric loss factor is 5 ⁇ 10 ⁇ 5.
  • the feed circuit is constructed in such a way that the magnetic fluxes in the slot radiators 5, 6 of each row are in phase and are 90 ° out of phase with the flows of the orthogonal row.
  • the signal reaches the antenna through the stripe-coaxial transition 14.
  • Fig. 4 there are graphs showing the measured distribution law for a tangent component of the strength of the electric field E illustrate in the antenna aperture. The measurements are carried out at a distance of 4/5 ⁇ from the antenna aperture on a frequency of 11.7 GHz.
  • the dependency of the antenna gain factor K on the frequency F is given according to the experimentally determined measurement data.
  • the aluminum grating 9 has 4x4 cells 10.
  • the internal dimensions of the cells 10 are equal to 95x95 mm.
  • the wall height of the grid 9 is 11.7 mm.
  • Two systems of the orthogonally arranged slot radiators 5 and 6 are accommodated on the plate of layer 4. Are in every system the slots are arranged in four rows to eight parallel slots of the radiators 5 or 6 in the row.
  • the layer 11 is made of an aluminum sheet 1 mm thick by perforating it to form square openings 12 of dimensions 7.5x7.5 mm.
  • the grid 9, the layer 11 and the conductive plate of the layer 4 together form sixteen cavity resonators with a partially permeable surface.
  • the arrangement of the slots on the surface of each resonator is identical to the arrangement of the slots in the first antenna.
  • the strip line of the feed circuit has the same dimensions in cross section as the line of the first antenna.
  • the signal reaches the antenna through a strip-waveguide transition 14.
  • the antenna cladding 13 is made of foam polystyrene with a density of 0.6 g / cm3.
  • the external dimensions of the antenna (without taking into account the dimensions of the coaxial strip transition) are 400x400x24 mm.
  • the antenna weight is equal to 2.7 kg.
  • the dependency of the gain factor K of the second antenna on the frequency F is specified on the basis of the measurement data in FIG. 10.
  • the ellipticity factor is no worse than 1 dB in the frequency range from 11.7 to 12.2 GHz.
  • the invention can be successfully used in systems for satellite and ground connection, in satellite television systems, in particular as an antenna for direct signal reception in satellite television in the 12 GHz range.

Landscapes

  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Une antenne plate comporte une structure multicouche composée d'une couche de blindage (1) d'une matière électroconductrice, une couche (2) dotée d'une alimentation en puissance du type à bande ainsi qu'une couche radiante (4) composée d'une plaque dotée d'émetteurs du type à fente (5, 6) connectée de manière électromagnétique aux bandes correspondantes (3) du circuit d'alimentation, toutes les couches étant séparées mutuellement au moyen d'éléments d'espacement diélectriques (7, 8). L'antenne contient une grille (9) de cellules tridimensionnelles (10) et elle porte une couche (11) partiellement transparente à la bande de fréquences des ondes reçues. La surface de la grille (9) se compose d'une matière électroconductrice et ladite grille (9) est située sur la plaque dotée de la couche radiante de manière à former, au moyen de chacune de ces cellules (10), un résonateur tridimensionnel dans lequel se trouve au moins un émetteur du type à fente (5 ou 6). La longueur et la largeur de chaque cellule (10) dépassent la longueur d'onde moyenne (μ), et sa hauteur diffère de la motié de la longueur d'onde moyenne (μ) d'une valeur d'approximativement 0,02 à 0,07 de la longueur d'onde (μ). L'antenne comprend également un adaptateur (14) connecté à la couche de blindage (1) et aux bandes (3) de l'alimentation.

Claims (5)

  1. Antenne plate sous forme d'une structure composite, dans laquelle les couches sont séparées l'une de l'autre par des couches intermédiaires de matière isolante (7, 8) et l'antenne est constituée par une couche de blindage (1) en une matière conductrice, par une couche (2) comprenant des bandes (3) d'un circuit d'alimentation par bandes et par une couche rayonnante (4) sous forme d'une plaque comprenant des émetteurs munis de fentes (5, 6), qui sont couplés par voie électromagnétique aux bandes respectives (3) du circuit d'alimentation, et qui contient une jonction (14) reliée à la couche de blindage (1) et aux bandes (3) du circuit d'alimentation, caractérisée en ce qu'elle contient, en outre, un réseau (9) à alvéoles creuses (10) et une couche (11) disposée par-dessus, partiellement perméable pour la gamme de la fréquence de service, les surfaces du réseau (9) étant réalisées en une matière conductrice et le réseau (9) établissant un contact galvanique sur la plaque avec la couche rayonnante (4) en formant une cavité résonante à l'intervention de chacune de ses alvéoles (10), dans lequel est disposée au moins un émetteur à fentes (5, 6), la largeur et la longueur de chaque alvéole (10) dépassant la longueur d'onde moyenne (λ), et la hauteur s'écartant de la demi-longueur d'onde moyenne (λ) d'une valeur d'environ 0,02 à 0,07 de la longueur d'onde (λ).
  2. Antenne plate selon la revendication 1, caractérisée en ce que la couche partiellement perméable (11) est fabriquée sous forme d'une plaque en une matière conductrice dans laquelle on a pratiqué des ouvertures de couplage (12), la hauteur du réseau (9) étant inférieure à une demi-longueur d'onde moyenne (λ).
  3. Antenne plate selon la revendication 1, caractérisée en ce que la couche partiellement perméable (11) est réalisée sous forme d'une feuille isolante sur laquelle sont disposées, de part et d'autre, des plaques métalliques (15) à isolation électrique, la hauteur du réseau (9) étant supérieure à une demi-longueur d'onde moyenne (λ).
  4. Antenne plate selon la revendication 1, caractérisée en ce que la largeur et la longueur de chaque alvéole (10) est ≧ 4 λ, λ représentant la longueur d'onde, en ce que le nombre des émetteurs à fentes (5) dans chaque alvéole (10) est égal à deux, et en ce que les émetteurs à fentes (5) sont disposés parallèlement à une paroi de l'alvéole (10) et à l'écart de cette dernière, les écartements représentant respectivement 1/4 et 3/4 de la longueur de la paroi en position orthogonale par rapport aux fentes des émetteurs (5).
  5. Antenne plate selon la revendication 4, caractérisée en ce que, dans chaque alvéole (10) du réseau (9), sont réalisés, en outre, deux émetteurs à fentes (6) qui sont disposés de manière mutuellement parallèle et en position orthogonale par rapport aux émetteurs à fentes principaux (5) en formant des écartements qui s'élèvent à 1/4, respectivement à 3/4 de la longueur de la paroi en position orthogonale par rapport aux émetteurs à fentes supplémentaires (6), les longueurs des bandes (3) correspondant à chaque paire d'émetteurs à fentes (5, 6) disposés en position orthogonale différant l'une de l'autre d'une valeur correspondant à 1/4 de la longueur d'onde (λ).
EP91921023A 1990-06-13 1991-06-13 Antenne plate Expired - Lifetime EP0489934B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SU4857338 1990-06-13
SU4857338 RU2016444C1 (ru) 1990-06-19 1990-06-19 Плоская антенна
PCT/SU1991/000117 WO1991020108A1 (fr) 1990-06-19 1991-06-13 Antenne plate

Publications (3)

Publication Number Publication Date
EP0489934A1 EP0489934A1 (fr) 1992-06-17
EP0489934A4 EP0489934A4 (en) 1992-08-12
EP0489934B1 true EP0489934B1 (fr) 1995-02-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91921023A Expired - Lifetime EP0489934B1 (fr) 1990-06-13 1991-06-13 Antenne plate

Country Status (4)

Country Link
EP (1) EP0489934B1 (fr)
DE (1) DE59104606D1 (fr)
RU (1) RU2016444C1 (fr)
WO (1) WO1991020108A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6411258B1 (en) * 2000-10-16 2002-06-25 Andrew Corporation Planar antenna array for point-to-point communications
US7038624B2 (en) * 2004-06-16 2006-05-02 Delphi Technologies, Inc. Patch antenna with parasitically enhanced perimeter
RU2449435C1 (ru) * 2011-02-07 2012-04-27 Государственное образовательное учреждение высшего профессионального образования Новгородский государственный университет имени Ярослава Мудрого Плоская решетка антенн дифракционного излучения и делитель мощности, используемый в ней
RU2560809C1 (ru) * 2014-02-12 2015-08-20 Открытое акционерное общество "Научно-производственное объединение "Правдинский радиозавод" Способ защиты от ветровых нагрузок на зеркальные антенны радиолокационных станций кругового обзора
RU2709031C1 (ru) * 2019-03-29 2019-12-13 Акционерное общество "Научно-производственное объединение Измерительной техники" (АО "НПО ИТ") Унифицированный антенный модуль

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523376A1 (fr) * 1982-03-12 1983-09-16 Labo Electronique Physique Element rayonnant ou recepteur de signaux hyperfrequences a polarisations circulaires gauche et droite et antenne plane comprenant un reseau de tels elements juxtaposes
JPH0720008B2 (ja) * 1986-02-25 1995-03-06 松下電工株式会社 平面アンテナ
JPH01103006A (ja) * 1987-10-15 1989-04-20 Matsushita Electric Works Ltd 平面アンテナ
US4926189A (en) * 1988-05-10 1990-05-15 Communications Satellite Corporation High-gain single- and dual-polarized antennas employing gridded printed-circuit elements
JPH01297905A (ja) * 1988-05-26 1989-12-01 Matsushita Electric Works Ltd 平面アンテナ

Also Published As

Publication number Publication date
RU2016444C1 (ru) 1994-07-15
DE59104606D1 (de) 1995-03-23
EP0489934A4 (en) 1992-08-12
WO1991020108A1 (fr) 1991-12-26
EP0489934A1 (fr) 1992-06-17

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