EP0552095A1 - Directional antenna with high gain and with heatproof radiating element - Google Patents
Directional antenna with high gain and with heatproof radiating element Download PDFInfo
- Publication number
- EP0552095A1 EP0552095A1 EP93400066A EP93400066A EP0552095A1 EP 0552095 A1 EP0552095 A1 EP 0552095A1 EP 93400066 A EP93400066 A EP 93400066A EP 93400066 A EP93400066 A EP 93400066A EP 0552095 A1 EP0552095 A1 EP 0552095A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- radiating
- radiating wing
- antenna according
- foot
- 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.)
- Ceased
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/286—Adaptation for use in or on aircraft, missiles, satellites, or balloons substantially flush mounted with the skin of the craft
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/40—Element having extended radiating surface
Definitions
- the present invention relates to an antenna with a radiating part which supports heat.
- Such an antenna is used on board high speed aircraft and animated vehicles, subjected to significant temperature rises, for communications of all kinds between these aircraft and in particular the ground or satellites as well as for their navigation. , their piloting, their pursuit, for example.
- the antenna of the invention can transmit and receive on a central frequency located in a wide range from a few hundred MHz to a few GHz, but with a relatively wide bandwidth, of the order of 10 to 15% of this frequency central.
- the antenna of the invention must above all be able to withstand temperatures exceeding 1000 degrees C.
- the antenna of this previous document whose radiating wing extends the foot and whose excitation part is connected to the center of the radiating wing, has a quasi-hemispherical radiation pattern and its gain is not very high, of the order of 3 dB; it is therefore not very well suited to certain applications which require high gain directional antennas, such as radio altimetry, for example.
- the present invention therefore aims to propose a modified monopolar antenna adapted to the envisaged applications.
- the invention relates to an antenna of the type defined above, characterized in that the radiating wing is connected to the foot by its substantially central part and, to the excitation part, near its edge.
- the antenna of the invention the radiation of which is carried out perpendicular to the plane of the radiating wing, around its axis of symmetry, can have a gain of 10 dB in its axis, with an angular opening to- 3 dB of the order of 50 degrees in the excitation plane E containing the electric field and 60 degrees in an H plane perpendicular to the plane E.
- the radiating wing is connected to the excitation part at two or four points, two by two angularly spaced 90 degrees and excited with the same amplitude and in quadrature phase, the field radiated by the antenna, with these spatial and temporal quadratures, then having a circular polarization.
- the monopolar element is made in one piece.
- the monopolar element is disposed inside a housing closed by a radome flush with the external surface of thermal protection plates of an aircraft fuselage.
- the bottom of the housing can constitute the ground plane of the antenna
- the monopolar element and the housing can be made in one piece and, even, the housing, the monopolar element and a protective plate can be made in one piece.
- the antenna which will be described is mounted on the fuselage of an aircraft, covered with thermal protection plates 2 fixed to the fuselage by spacers, not shown.
- the antenna comprises a radiating part 4, an excitation part and a set of, here two, coaxial supply cables 6.
- the radiating part 4 is housed in a conductive box 7, fixed to the fuselage by spacers, not shown, and slid between protective plates 2.
- the antenna receiving unit has a flat bottom 9 and a cylindrical wall 10. Near the free edge of the wall 10, extends, outside it, an annular shoulder 12 for receiving the plates 2.
- the wall of the plates thermal protection 2, adjacent to the housing 7, is shaped, near the housing 7, to present an annular recess portion 14 for receiving a protective radome 15, flush with the external surface of the plates 2 and closing the housing 7.
- the radiating part 4 of the antenna consists of a massive monopolar element comprising a foot 17, of low height, here perpendicular to the bottom 9 of the housing, and a planar radiating wing 18 extending parallel to the bottom 9 of the housing, withdrawal with respect to the protective radome 15.
- the radiating wing 18 has here a disc shape and it is connected to the foot 17, here cylindrical, by a central part 16 therefore also disc-shaped, but smaller.
- the monopolar element 4 is solid and is formed in one piece.
- the excitation part of the monopolar element 4 is distant from the radiating part 4 of the antenna. In the example considered, it is fixed under the fuselage by fasteners.
- This excitation part is in fact made up of an amplitude and phase distribution member, on two excitation points 24, 24 ′ of the power arriving by a connector.
- the phases are supplied between the distributor and the two points of the radiating wing 18 by the conductive cores 25 of the two coaxial cables 6, including the outer conductive sheaths 26, which are flush with the bottom 9 of the housing to which, on one side, they are fixed, are brought to ground.
- the bottom 9 of the housing 7 therefore forms the ground plane of the monopolar element 4 and the base 17 serves to ground the radiating wing 18.
- the ducts 26 cables 6 pass through the fuselage and are connected to the distributor.
- the two excitation points 24, 24 ' are located near the edge 8 of the radiating disc 18 and are angularly spaced 90 degrees. They are in spatial quadrature.
- the supply of the two points 24, 24 ', by the distributor, is here such that they are in phase quadrature (phase shift of 90 degrees).
- the field radiated by the antenna which has just been described, with two excitation points in spatial and temporal quadratures, has a circular polarization.
- the coaxial cables 6 are filled with an insulating material, of the ceramic type resistant to high temperatures.
- the thermal protection plates 2 and the housing 7 are made of conductive refractory material, for example composite, based on carbon protected against oxidation.
- the radiating monopolar element is, for example, of metallic or composite material, conductive and protected against oxidation.
- the antenna which has just been described has a directional radiation diagram in its axis 5; its radiating part 4 can be subjected to severe temperature conditions, for example caused by high speeds or re-entry into the layers of the atmosphere; its bandwidth is satisfactory.
- the radiating disc 18 could have only one excitation point.
- the polarization would be linear. It could also, for a circular polarization still, include four, in two pairs, two to two angularly spaced 90 degrees and excited with the same amplitude and in phase quadrature, these excitation points being in spatial and temporal quadratures.
- the geometry of the radiating wing is substantially different, with a surface, in the excitation plane, elliptical, square, rectangular or polygonal. Similarly, the radiating wing could be slightly off-center with respect to the grounding foot.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
La présente invention concerne une antenne à partie rayonnante supportant la chaleur.The present invention relates to an antenna with a radiating part which supports heat.
On utilise une telle antenne à bord d'aéronefs et d'engins animés d'une grande vitesse, soumis à des élévations de température importantes, pour les communications de toutes sortes entre ces aéronefs et notamment le sol ou des satellites ainsi que pour leur navigation, leur pilotage, leur poursuite, par exemple.Such an antenna is used on board high speed aircraft and animated vehicles, subjected to significant temperature rises, for communications of all kinds between these aircraft and in particular the ground or satellites as well as for their navigation. , their piloting, their pursuit, for example.
L'antenne de l'invention peut émettre et recevoir sur une fréquence centrale située dans une large plage allant de quelques centaines de MHz à quelques GHz, mais avec une bande passante relativement large, de l'ordre de 10 à 15 % de cette fréquence centrale.The antenna of the invention can transmit and receive on a central frequency located in a wide range from a few hundred MHz to a few GHz, but with a relatively wide bandwidth, of the order of 10 to 15% of this frequency central.
L'antenne de l'invention doit surtout pouvoir supporter des températures dépassant 1 000 degrés C.The antenna of the invention must above all be able to withstand temperatures exceeding 1000 degrees C.
On connaît déjà, par le document FR-A-8909298, au nom de la demanderesse, une antenne à partie rayonnante, comportant un élément monopolaire massif, comprenant un pied de faible hauteur directement fixé à un plan de masse et une aile rayonnante large qui s'étend parallèlement au plan de masse à proximité de celui-ci et est reliée à lui par le pied, pouvant être soumis à des conditions de température sévères, et à partie d'excitation, reliée électriquement à l'aile rayonnante, éloignée de celle-ci. Grâce à sa configuration écrasée, cette antenne monopolaire peut facilement être noyée dans un fuselage ou un revêtement protecteur de celui-ci, pour que son aile rayonnante soit en retrait par rapport à sa surface externe ou l'affleure et ne pas être ainsi trop soumise aux élévations de température. Grâce à l'étendue de son aile rayonnante et à son caractère massif, cette antenne présente une bonne bande passante. Cependant l'antenne de ce document antérieur, dont l'aile rayonnante prolonge le pied et dont la partie d'excitation est reliée au centre de l'aile rayonnante, a un diagramme de rayonnement quasi-hémisphérique et son gain n'est pas très élevé, de l'ordre de 3 dB ; elle n'est donc pas très bien adaptée à certaines applications qui exigent des antennes directives à gain élevé, comme la radioaltimétrie, par exemple.Document FR-A-8909298 is already known, in the name of the applicant, an antenna with a radiating part, comprising a massive monopolar element, comprising a foot of low height directly fixed to a ground plane and a wide radiating wing which extends parallel to the ground plane close to it and is connected to it by the foot, which can be subjected to severe temperature conditions, and to excitation part, electrically connected to the radiating wing, distant from this one. Thanks to its crushed configuration, this monopolar antenna can easily be embedded in a fuselage or a protective coating thereof, so that its radiating wing is set back from its external surface or is flush with it and thus not be too subject to temperature rises. Thanks to the extent of its radiating wing and its massive character, this antenna has good bandwidth. However, the antenna of this previous document, whose radiating wing extends the foot and whose excitation part is connected to the center of the radiating wing, has a quasi-hemispherical radiation pattern and its gain is not very high, of the order of 3 dB; it is therefore not very well suited to certain applications which require high gain directional antennas, such as radio altimetry, for example.
La présente invention vise donc à proposer une antenne monopolaire modifiée et adaptée aux applications envisagées.The present invention therefore aims to propose a modified monopolar antenna adapted to the envisaged applications.
A cet effet, l'invention concerne une antenne du type défini ci-dessus, caractérisée par le fait que l'aile rayonnante est reliée au pied par sa partie sensiblement centrale et, à la partie d'excitation, près de son bord.To this end, the invention relates to an antenna of the type defined above, characterized in that the radiating wing is connected to the foot by its substantially central part and, to the excitation part, near its edge.
Ainsi agencée, l'antenne de l'invention, dont le rayonnement s'effectue perpendiculairement au plan de l'aile rayonnante, autour de son axe de symétrie, peut avoir un gain de 10 dB dans son axe, avec une ouverture angulaire à-3 dB de l'ordre de 50 degrés dans le plan E d'excitation contenant le champ électrique et de 60 degrés dans un plan H perpendiculaire au plan E.Thus arranged, the antenna of the invention, the radiation of which is carried out perpendicular to the plane of the radiating wing, around its axis of symmetry, can have a gain of 10 dB in its axis, with an angular opening to- 3 dB of the order of 50 degrees in the excitation plane E containing the electric field and 60 degrees in an H plane perpendicular to the plane E.
On notera qu'il était connu une antenne dite "microstrip", à disque de cuivre rayonnant imprimé sur un côté d'un substrat, à plan de masse déposé de l'autre côté du substrat et à mise à la masse du disque rayonnant en son centre. Mais, pour l'appréciation de l'activité inventive impliquée dans l'invention de la présente demande, cette technique "microstrip" ne doit pas être prise en compte. L'état de la technique ne peut concerner que les antennes supportant de sévères conditions de température. Ce n'est pas le cas des antennes "microstrip", dont les couches de cuivre imprimées se décolleraient à la chaleur. En outre, pour proposer son antenne du document FR-A-8909298, de laquelle elle est partie pour proposer celle de la présente demande, la demanderesse avait déjà écarté la technique des antennes "microstrip". Elle n'avait donc aucune raison, pour résoudre son nouveau problème, d'entreprendre une démarche inverse de celle qui l'avait conduite à sa première invention. Et si, par impossible, il n'était pas admis que les antennes "microstrip" doivent être écartées de l'état de la technique, alors, cette démarche inverse serait précisément un gage d'activité inventive.It will be noted that a so-called "microstrip" antenna was known, with a radiating copper disc printed on one side of a substrate, with a ground plane deposited on the other side of the substrate and with grounding of the disc. radiating at its center. However, for the assessment of the inventive step involved in the invention of the present application, this "microstrip" technique should not be taken into account. The state of the art can only relate to antennas supporting severe temperature conditions. This is not the case with "microstrip" antennas, the printed copper layers of which would peel off with heat. In addition, to propose its antenna from document FR-A-8909298, from which it left to propose that of the present application, the applicant had already rejected the technique of "microstrip" antennas. She therefore had no reason, to solve her new problem, to take a step opposite to that which led her to her first invention. And if, by impossible, it was not admitted that the "microstrip" antennas must be discarded from the state of the art, then, this reverse approach would be precisely a guarantee of inventive activity.
Dans une forme de réalisation intéressante de l'antenne de l'invention, l'aile rayonnante est reliée à la partie d'excitation en deux ou quatre points, deux à deux angulairement espacés de 90 degrés et excités avec la même amplitude et en quadrature de phase, le champ rayonné par l'antenne, avec ces quadratures spatiales et temporelles, ayant alors une polarisation circulaire.In an interesting embodiment of the antenna of the invention, the radiating wing is connected to the excitation part at two or four points, two by two angularly spaced 90 degrees and excited with the same amplitude and in quadrature phase, the field radiated by the antenna, with these spatial and temporal quadratures, then having a circular polarization.
Avantageusement, l'élément monopolaire est réalisé d'une seule pièce.Advantageously, the monopolar element is made in one piece.
Avantageusement encore, l'élément monopolaire est disposé à l'intérieur d'un boîtier fermé par un radôme affleurant la surface externe de plaques de protection thermique d'un fuselage d'aéronef.Advantageously also, the monopolar element is disposed inside a housing closed by a radome flush with the external surface of thermal protection plates of an aircraft fuselage.
Dans ce cas, le fond du boîtier peut constituer le plan de masse de l'antenne, l'élément monopolaire et le boîtier peuvent être réalisés d'une seule pièce et, même, le boîtier, l'élément monopolaire et une plaque de protection thermique peuvent être réalisés d'une seule pièce.In this case, the bottom of the housing can constitute the ground plane of the antenna, the monopolar element and the housing can be made in one piece and, even, the housing, the monopolar element and a protective plate can be made in one piece.
L'invention sera mieux comprise à l'aide de la description suivante d'une forme de réalisation de l'antenne de l'invention, en référence au dessin annexé, sur lequel
- la figure 1 représente une vue en coupe de l'antenne et
- la figure 2 une vue de dessus de l'aile rayonnante.
- FIG. 1 represents a sectional view of the antenna and
- Figure 2 a top view of the radiating wing.
L'antenne qui va être décrite est montée sur le fuselage d'un aéronef, recouvert de plaques de protection thermique 2 fixées au fuselage par des entretoises, non représentées.The antenna which will be described is mounted on the fuselage of an aircraft, covered with
L'antenne comporte une partie rayonnante 4, une partie d'excitation et un jeu de, ici deux, câbles coaxiaux d'alimentation 6.The antenna comprises a radiating part 4, an excitation part and a set of, here two, coaxial supply cables 6.
La partie rayonnante 4 est logée dans un boîtier conducteur 7, fixé au fuselage par des entretoises, non représentées, et glissé entre des plaques de protection 2.The radiating part 4 is housed in a
Le boîtier récepteur de l'antenne comporte un fond plat 9 et une paroi cylindrique 10. A proximité du bord libre de la paroi 10, s'étend, extérieurement à elle, un épaulement annulaire 12 de réception des plaques 2. La paroi des plaques de protection thermique 2, adjacentes au boîtier 7, est conformée, à proximité du boîtier 7, pour présenter une portion d'évidement annulaire 14 de réception d'un radôme de protection 15, affleurant la surface externe des plaques 2 et fermant le boîtier 7.The antenna receiving unit has a flat bottom 9 and a
La partie rayonnante 4 de l'antenne est constituée d'un élément monopolaire massif comprenant un pied 17, de faible hauteur, ici perpendiculaire au fond 9 du boîtier, et une aile rayonnante plane 18 s'étendant parallèlement au fond 9 du boîtier, en retrait par rapport au radôme de protection 15. L'aile rayonnante 18 a ici une forme de disque et elle est reliée au pied 17, ici cylindrique, par une partie centrale 16 donc aussi en forme de disque, mais plus petit.The radiating part 4 of the antenna consists of a massive monopolar element comprising a
L'élément monopolaire 4 est massif et est formé d'une seule pièce.The monopolar element 4 is solid and is formed in one piece.
La partie d'excitation de l'élément monopolaire 4 est éloignée de la partie rayonnante 4 de l'antenne. Dans l'exemple considéré, elle est fixée sous le fuselage par des attaches.The excitation part of the monopolar element 4 is distant from the radiating part 4 of the antenna. In the example considered, it is fixed under the fuselage by fasteners.
Cette partie d'excitation est en fait constituée d'un organe de répartition en amplitude et en phase, sur deux points d'excitation 24, 24' de la puissance arrivant par un connecteur. L'alimentation des phases, entre le répartiteur et les deux points de l'aile rayonnante 18, s'effectue par les âmes conductrices 25 des deux câbles coaxiaux 6, dont les gaines conductrices extérieures 26, qui affleurent le fond 9 du boîtier auquel, d'un côté, elles sont fixées, sont portées à la masse. Le fond 9 du boîtier 7 forme donc le plan de masse de l'élément monopolaire 4 et le pied 17 sert à mettre l'aile rayonnante 18 à la masse. De l'autre côté, les gaines 26 des câbles 6 traversent le fuselage et sont reliées au répartiteur.This excitation part is in fact made up of an amplitude and phase distribution member, on two
Les deux points d'excitation 24, 24' sont situés près du bord 8 du disque rayonnant 18 et sont angulairement espacés de 90 degrés. Ils sont en quadrature spatiale. L'alimentation des deux points 24, 24', par le répartiteur, est ici telle qu'ils sont en quadrature de phase (déphasage de 90 degrés). Ainsi, le champ rayonné par l'antenne qui vient d'être décrite, avec deux points d'excitation en quadratures spatiale et temporelle, a une polarisation circulaire.The two
Les câbles coaxiaux 6 sont remplis d'un matériau isolant, du type céramique résistant aux hautes températures.The coaxial cables 6 are filled with an insulating material, of the ceramic type resistant to high temperatures.
Les plaques de protection thermique 2 et le boîtier 7 sont en matériau réfractaire conducteur, par exemple composite, à base de carbone protégé contre l'oxydation.The
L'élément monopolaire rayonnant est, par exemple, en matériau métallique ou composite, conducteur et protégé contre l'oxydation.The radiating monopolar element is, for example, of metallic or composite material, conductive and protected against oxidation.
L'antenne qui vient d'être décrite a un diagramme de rayonnement directif dans son axe 5 ; sa partie rayonnante 4 peut être soumise à des conditions de température sévères, par exemple provoquées par de grandes vitesses ou une rentrée dans les couches de l'atmosphère ; sa bande passante est satisfaisante.The antenna which has just been described has a directional radiation diagram in its
Dans une variante de réalisation, le disque rayonnant 18 pourrait ne comporter qu'un seul point d'excitation. Dans ce cas, la polarisation serait linéaire. Il pourrait aussi, pour une polarisation circulaire encore, en comporter quatre, en deux paires, deux à deux angulairement espacés de 90 degrés et excités avec la même amplitude et en quadrature de phase, ces points d'excitation étant en quadratures spatiale et temporelle. Dans d'autres variantes de réalisation encore, à performances comparables, la géométrie de l'aile rayonnante est sensiblement différente, avec une surface, dans le plan d'excitation, elliptique, carrée, rectangulaire ou polygonale. De même, l'aile rayonnante pourrait être légèrement décentrée par rapport au pied de mise à la masse.In an alternative embodiment, the
Claims (6)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9200300A FR2686193B1 (en) | 1992-01-14 | 1992-01-14 | HIGH GAIN DIRECTIVE ANTENNA WITH RADIANT PART SUPPORTING HEAT. |
| FR9200300 | 1992-01-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0552095A1 true EP0552095A1 (en) | 1993-07-21 |
Family
ID=9425600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93400066A Ceased EP0552095A1 (en) | 1992-01-14 | 1993-01-13 | Directional antenna with high gain and with heatproof radiating element |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0552095A1 (en) |
| FR (1) | FR2686193B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2479080C1 (en) * | 2011-08-25 | 2013-04-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный университет" (ФГБОУ ВПО ВГУ) | Broadband microstrip antenna with trapezoidal cross section |
| CN105914463A (en) * | 2016-06-28 | 2016-08-31 | 湖北航天技术研究院总体设计所 | Flexible connection device for high-temperature resistant radome |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160976A (en) * | 1977-12-12 | 1979-07-10 | Motorola, Inc. | Broadband microstrip disc antenna |
| EP0278070A1 (en) * | 1986-12-23 | 1988-08-17 | Ball Corporation | Circular microstrip vehicular rf antenna |
| EP0408430A1 (en) * | 1989-07-11 | 1991-01-16 | SAT (SOCIETE ANONYME DE TELECOMMUNICATIONS) Société Anonyme française | Antenna with a hemispheric radiation pattern and heatproof radiating elements |
-
1992
- 1992-01-14 FR FR9200300A patent/FR2686193B1/en not_active Expired - Fee Related
-
1993
- 1993-01-13 EP EP93400066A patent/EP0552095A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160976A (en) * | 1977-12-12 | 1979-07-10 | Motorola, Inc. | Broadband microstrip disc antenna |
| EP0278070A1 (en) * | 1986-12-23 | 1988-08-17 | Ball Corporation | Circular microstrip vehicular rf antenna |
| EP0408430A1 (en) * | 1989-07-11 | 1991-01-16 | SAT (SOCIETE ANONYME DE TELECOMMUNICATIONS) Société Anonyme française | Antenna with a hemispheric radiation pattern and heatproof radiating elements |
Non-Patent Citations (1)
| Title |
|---|
| INGVARSON P.: "HIGH TEMPERATURE ANTENNAS FOR THE HERMES SPACEPLANE.", PROCEEDINGS OF THE ANTENNAS AND PROPAGATION SOCIETY ANNUAL MEETING. 1991. VENUE AND EXACT DATE NOT SHOWN., NEW YORK, IEEE., US, vol. 03., 8 January 1992 (1992-01-08), US, pages 1590 - 1593., XP000239294, ISBN: 978-0-7803-0144-3 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2479080C1 (en) * | 2011-08-25 | 2013-04-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный университет" (ФГБОУ ВПО ВГУ) | Broadband microstrip antenna with trapezoidal cross section |
| CN105914463A (en) * | 2016-06-28 | 2016-08-31 | 湖北航天技术研究院总体设计所 | Flexible connection device for high-temperature resistant radome |
| CN105914463B (en) * | 2016-06-28 | 2018-07-31 | 湖北航天技术研究院总体设计所 | A kind of flexible connecting device of high temperature resistant antenna house |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2686193A1 (en) | 1993-07-16 |
| FR2686193B1 (en) | 1994-04-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1038333B1 (en) | Patch antenna | |
| EP0899814B1 (en) | Radiating structure | |
| EP0497702A1 (en) | Radiating element structure for a plate antenna | |
| EP0373052A1 (en) | Support element for a transmission line, especially for a triplate line | |
| EP2660862A2 (en) | Microelectronic wireless transmission device | |
| WO2018046230A1 (en) | Single-piece cover for an electronic device | |
| EP1225655A1 (en) | Dual-band planar antenna and apparatus including such an antenna device | |
| EP1346442A1 (en) | Printed patch antenna | |
| CA2215480A1 (en) | Transition from ridged wave guide to planar circuit | |
| EP0552095A1 (en) | Directional antenna with high gain and with heatproof radiating element | |
| EP2581923B1 (en) | Mounting member for a contact of an isolation switch in a current distribution cell | |
| WO2012095365A1 (en) | Dielectric resonator antenna | |
| WO2000069019A1 (en) | Vertical polarisation antenna | |
| EP0408430B1 (en) | Antenna with a hemispheric radiation pattern and heatproof radiating elements | |
| EP3512057B1 (en) | Wireless communication electrical apparatus and electrical cabinet comprising said electrical apparatus | |
| EP0860894B1 (en) | Miniature resonant antenna in the form of annular microstrips | |
| EP1460710B1 (en) | Microwave element used for dissipation or attenuation of energy | |
| EP0174250B1 (en) | Device for receiving dual polarized microwave signals | |
| CA1026458A (en) | Antenna horn | |
| FR2587547A1 (en) | MULTI-ANTENNA ELEMENT | |
| WO2013053476A2 (en) | Mechanical retention system, assembly comprising such a system and an electronic board and method of assembling such a system and such a board on a surface | |
| EP2879234B1 (en) | Electronic apparatus with radio antenna folded in a housing | |
| FR2760133A1 (en) | RESONANT ANTENNA FOR THE TRANSMISSION OR RECEPTION OF POLARIZED WAVES | |
| FR3096027A1 (en) | Aerial vehicle without humans on board with electromagnetically protective housing | |
| EP3741003A1 (en) | Patch antenna for equipping a spacecraft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES GB IT NL SE |
|
| 17P | Request for examination filed |
Effective date: 19940113 |
|
| 17Q | First examination report despatched |
Effective date: 19951102 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
| 18R | Application refused |
Effective date: 19971222 |