EP0295688B1 - Tête hyperfréquence d'émission-réception duplexées à polarisations orthoganales - Google Patents

Tête hyperfréquence d'émission-réception duplexées à polarisations orthoganales Download PDF

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Publication number
EP0295688B1
EP0295688B1 EP88109666A EP88109666A EP0295688B1 EP 0295688 B1 EP0295688 B1 EP 0295688B1 EP 88109666 A EP88109666 A EP 88109666A EP 88109666 A EP88109666 A EP 88109666A EP 0295688 B1 EP0295688 B1 EP 0295688B1
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EP
European Patent Office
Prior art keywords
waveguide
housing
cavity
head according
microwave head
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
EP88109666A
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German (de)
English (en)
French (fr)
Other versions
EP0295688A1 (fr
Inventor
Jean-Claude Cruchon
Franck Fontaine
Michel Brugidou
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.)
Alcatel CIT SA
Original Assignee
Alcatel Telspace SA
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Publication date
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Publication of EP0295688A1 publication Critical patent/EP0295688A1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
    • H01P1/161—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion sustaining two independent orthogonal modes, e.g. orthomode transducer

Definitions

  • the invention relates to a duplex transmission-reception microwave head with orthogonal polarizations.
  • duplexers are currently widespread in all radio link systems.
  • the vast majority of them use waveguide access on both polarities, or coaxial on rectangular or square horns. They are generally based on the principle that an oversized waveguide can propagate two waves (case of the TE 11 circular or square guide) with orthogonal polarizations.
  • the separation of the electromagnetic fields is obtained by a mode filtering effect (for example using a decoupling plate which carries one of the types of propagation under the cut) and by combining the guide lengths.
  • a good quality duplexer ensures a decoupling of 40 to 50 dB between the ports and needs to be carried out as a waveguide on all of its ports, which preserves the distribution of electromagnetic fields. This principle is always retained for its greater reproduction fidelity and its better symmetry.
  • the competition is, in this case, transferred to the mechanical environment and uses molded cases as well as hydride or composite technologies.
  • a French invention patent published under the number 2 502 405 describes a system for receiving microwave signals with linear orthogonal polarizations essentially comprising, following a parabolic reflector, a reception horn, a bandpass filter, a separator modes and a box containing electronic amplification and frequency conversion circuits.
  • the horn and the filter are made as a waveguide and are, with the mode separator and the housing, carried by the same support consisting of two half-shells symmetrical with respect to their longitudinal plane of assembly and which can be manufactured by a common industrial process such as, in particular, molding or injection of metal or plastic material subsequently metallized.
  • the connection between the waveguide part and the electronic circuits is ensured by the subdivision of the separator into two waveguides of orthogonal rectangular straight sections; these two guides being respectively coupled to two support plates of these circuits.
  • Such an embodiment does not allow extensive integration, due to the existence of problems of deformation of the fields by coupling between the microwave signals with orthogonal polarizations.
  • the object of the invention is to overcome these drawbacks.
  • the invention proposes a duplex transmission-reception microwave head with orthogonal polarizations, comprising an elongated housing provided at one end with a longitudinal bore forming a first waveguide, and a transverse bore forming a second waveguide opening, at its first end, into the first guide, a receiving antenna which plunges into the first guide at a place situated between the internal end of this first guide and the place where the second guide opens out, and a second antenna which plunges into the second guide at its second end, characterized in that this second antenna is a transmitting antenna, each of these antennas being connected respectively to a coaxial access, in that a metal plate is disposed longitudinally in the first guide between two transverse planes containing the two antennas, in that the housing, of cylindrical or semi-cylindrical shape, is formed of fins concentric, serving as a radiator, machined at a first end of the housing to form three flats, the first two being arranged parallel to the metal plate on either side of the housing and the third being perpen
  • such a head allows a guide-coaxial composite integration.
  • the microwave head according to the invention comprises a box illustrated in FIGS. 1 to 5.
  • This housing 10 of cylindrical or semi-cylindrical shape is formed of concentric fins 11, serving as a radiator, which have been machined at a first end 12 of the housing 10 to form three flats, the first two 13, 14 above and below being parallel and the third 15 being perpendicular to them.
  • the three cavities 16, 17, 18 also have holes 20 allowing the fixing in each of them of a circuit.
  • the third cavity 18 is connected to the other two by a succession of parallel orifices 21, intended to contain connection wires between the different circuits.
  • These three cavities 16, 17, 18 communicate respectively with the first end 12 of the housing 10 through three orifices 22, 23 and 24.
  • a longitudinal cylindrical bore 25 is machined in this casing to open at the second end 26 thereof so as to form a first guide in TE 11 mode.
  • the first (16) and the second (17) cavity disposed on either side of this bore 25 communicate with the latter via respectively a first transverse bore 27 of cylindrical shape and a second bore 28 transverse rectangular shape, partially closed on the side of the first longitudinal bore by an iris 29, so as to form a rectangular guide in TE 10 mode with iris compensation.
  • a polarization plate 31 cuts the first cavity in a median plane in the longitudinal direction and it is located between the first (27) and the second (28) transverse bore. This plate makes it possible to short-circuit that of the electric fields which is parallel to it.
  • the head according to the invention is shown in Figures 6 and 7, once mounted.
  • the three cavities 16, 17 and 18 are respectively closed, to form electromagnetic shielding enclosures, by three flat covers 35, 36 and 37 which rest on the three flats 13, 14 and 15.
  • Each of these three circuits is connected to a plug fixed in one of the orifices 22, 23 and 24, the first two being coaxial plugs 41 and 42, the third not appearing in the figures.
  • the reception circuit 38 for example of the LNC ("Low noise converter”) type, is an amplification circuit of the reception signal comprising a antenna 44 which passes through the first transverse bore 27 so as to be disposed, as for its reception part proper, in the longitudinal bore 25.
  • LNC Low noise converter
  • the transmission circuit 39 for example of the HPA ("high power amplifier”) type, is a circuit for amplifying the transmission signal comprising an antenna 45 positioned in the second transverse bore 28. This circuit forms a shutter of said bore transverse 28.
  • the third circuit 40 enables current components of the other two circuits 38 and 39, in particular their transistors, to be polarized by means of wires which pass through the orifices 21.
  • this housing 10 On the second end of this housing 10 can be mounted an excitation horn located in the extension of the longitudinal bore 25 so as to complete the microwave head of the invention, such a horn well known to those skilled in the art. art not shown in the figures.
  • each of the circuits 38, 39, 40 located on the side of the housing can be arranged a metal sole serving as ground plane.
  • the whole of the head constitutes a waterproof block which forms a heat radiator mounted in the open air or in the room, at the focus of a parabolic or off-set antenna by means of a corrugated or trapped bipolar circular source. .
  • the invention relates to the composite arrangement of the duplexer associated with the transmission and reception amplification circuits, while serving as a radiator for the energy consumed without loss of link on the transmission and a very low noise temperature at the reception.
  • the iris 29 which allows the adaptation between the first guide 25 and the second guide 28 can be replaced by a post.
  • the longitudinal bore can be square or rectangular: It propagates, in this case too, a TE 11 mode.
  • the second guide 28 can be square or rectangular: it then propagates a TE 10 mode, but it can also be circular: it then propagates a TE 11 mode.

Landscapes

  • Waveguide Aerials (AREA)
  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)
EP88109666A 1987-06-18 1988-06-16 Tête hyperfréquence d'émission-réception duplexées à polarisations orthoganales Expired - Lifetime EP0295688B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR8708520A FR2616974B1 (fr) 1987-06-18 1987-06-18 Tete hyperfrequence d'emission-reception duplexees a polarisations orthogonales
FR8708520 1987-06-18
IN500DE1988 IN172418B (enrdf_load_stackoverflow) 1987-06-18 1988-06-07

Publications (2)

Publication Number Publication Date
EP0295688A1 EP0295688A1 (fr) 1988-12-21
EP0295688B1 true EP0295688B1 (fr) 1992-12-23

Family

ID=26226042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109666A Expired - Lifetime EP0295688B1 (fr) 1987-06-18 1988-06-16 Tête hyperfréquence d'émission-réception duplexées à polarisations orthoganales

Country Status (8)

Country Link
US (1) US4853657A (enrdf_load_stackoverflow)
EP (1) EP0295688B1 (enrdf_load_stackoverflow)
CN (1) CN1016126B (enrdf_load_stackoverflow)
AU (1) AU604917B2 (enrdf_load_stackoverflow)
CA (1) CA1293564C (enrdf_load_stackoverflow)
DE (1) DE3876862T2 (enrdf_load_stackoverflow)
FR (1) FR2616974B1 (enrdf_load_stackoverflow)
IN (1) IN172418B (enrdf_load_stackoverflow)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
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US5255003B1 (en) * 1987-10-02 1995-05-16 Antenna Downlink Inc Multiple-frequency microwave feed assembly
US5187021A (en) * 1989-02-08 1993-02-16 Diamond Fiber Composites, Inc. Coated and whiskered fibers for use in composite materials
US5162808A (en) * 1990-12-18 1992-11-10 Prodelin Corporation Antenna feed with selectable relative polarization
US5374938A (en) * 1992-01-21 1994-12-20 Sharp Kabushiki Kaisha Waveguide to microstrip conversion means in a satellite broadcasting adaptor
JP3366031B2 (ja) * 1992-11-26 2003-01-14 松下電器産業株式会社 導波管−マイクロストリップ変換器
FR2779294A1 (fr) * 1998-05-29 1999-12-03 Thomson Multimedia Sa Dispositif d'emission/reception de signaux
US7102571B2 (en) * 2002-11-08 2006-09-05 Kvh Industries, Inc. Offset stacked patch antenna and method
US6856300B2 (en) * 2002-11-08 2005-02-15 Kvh Industries, Inc. Feed network and method for an offset stacked patch antenna array
WO2005076405A1 (en) * 2004-01-08 2005-08-18 Kvh Industries, Inc. Microstrip transition and network
US6967619B2 (en) * 2004-01-08 2005-11-22 Kvh Industries, Inc. Low noise block
US6977614B2 (en) * 2004-01-08 2005-12-20 Kvh Industries, Inc. Microstrip transition and network
CN101807930A (zh) * 2009-02-13 2010-08-18 华为技术有限公司 基站射频双工器、射频模块和射频系统
US9742486B2 (en) 2014-11-05 2017-08-22 Viasat, Inc. High temperature operation of an airborne satellite terminal
CN118921052B (zh) * 2024-08-02 2025-03-25 北京雷格讯电子股份有限公司 一种公共端口垂直布局的微波开关及其控制方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2810904A (en) * 1955-02-09 1957-10-22 Blitz Daniel Balanced detector
FR1130115A (fr) * 1955-07-04 1957-01-31 Coupleurs directionnels résonnants à guide carré
US2961618A (en) * 1957-06-12 1960-11-22 Bell Telephone Labor Inc Selective mode transducer
US3162828A (en) * 1961-03-02 1964-12-22 Avco Corp Cross-linear polarization system
US3086203A (en) * 1961-03-07 1963-04-16 Bell Telephone Labor Inc Communication system using polarized waves and employing concentric waveguides to control transmitter-receiver interaction
FR2502405A1 (fr) * 1981-03-18 1982-09-24 Portenseigne Systeme de reception de signaux hyperfrequences a polarisations orthogonales
DE3111106A1 (de) * 1981-03-20 1982-09-30 Siemens AG, 1000 Berlin und 8000 München Polarisationsweiche
JPS5999801A (ja) * 1982-11-30 1984-06-08 Toshiba Corp マイクロ波受信装置
FR2591406B1 (fr) * 1985-12-10 1989-01-13 Loire Electronique Dispositif de reception simultanee de deux signaux hyperfrequences a polarisation circulaire de sens inverses
DE3634772A1 (de) * 1986-09-08 1988-03-17 Kabelmetal Electro Gmbh Antennenerreger fuer mindestens zwei unterschiedliche frequenzbaender

Also Published As

Publication number Publication date
CA1293564C (fr) 1991-12-24
FR2616974A1 (fr) 1988-12-23
EP0295688A1 (fr) 1988-12-21
AU604917B2 (en) 1991-01-03
DE3876862T2 (de) 1993-04-29
DE3876862D1 (de) 1993-02-04
IN172418B (enrdf_load_stackoverflow) 1993-07-17
FR2616974B1 (fr) 1989-07-07
AU1772488A (en) 1988-12-22
US4853657A (en) 1989-08-01
CN1016126B (zh) 1992-04-01
CN1030162A (zh) 1989-01-04

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