EP0057121A2 - Hochfrequenz-Doppelbanderreger und eine Antenne mit einem solchen Erreger - Google Patents

Hochfrequenz-Doppelbanderreger und eine Antenne mit einem solchen Erreger Download PDF

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Publication number
EP0057121A2
EP0057121A2 EP82400050A EP82400050A EP0057121A2 EP 0057121 A2 EP0057121 A2 EP 0057121A2 EP 82400050 A EP82400050 A EP 82400050A EP 82400050 A EP82400050 A EP 82400050A EP 0057121 A2 EP0057121 A2 EP 0057121A2
Authority
EP
European Patent Office
Prior art keywords
band
source
plane
frequency
reflector
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.)
Granted
Application number
EP82400050A
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English (en)
French (fr)
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EP0057121A3 (en
EP0057121B1 (de
Inventor
François Salvat
Jean Bouko
Claude Coquio
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to AT82400050T priority Critical patent/ATE26628T1/de
Publication of EP0057121A2 publication Critical patent/EP0057121A2/de
Publication of EP0057121A3 publication Critical patent/EP0057121A3/fr
Application granted granted Critical
Publication of EP0057121B1 publication Critical patent/EP0057121B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/04—Multimode antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/45—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device

Definitions

  • the present invention relates to a monopulse, multi-mode dual-band microwave source and to aerials using such a source.
  • the low band (band I for example) allows correct tracking up to a certain elevation angle above the horizon.
  • a higher frequency band is used (W band for example) giving a much finer beam.
  • the second cited application describes a multi-mode mono-band and wideband microwave source structure constituting FIG. 1 of the present application and described by way of prior art.
  • a dual-band microwave source of preferably monopulse, multi-mode and broadband comprising an assembly constituted by a first cavity supplied by a group of excitation guides transmitting the fundamental mode in a first frequency band and a profiled obstacle penetrating into this cavity and defining the mode of propagation in plane E is characterized in that the profiled obstacle is hollow, internally delimiting a second cavity into which opens another group of excitation guides transmitting the fundamental mode in a frequency band different from the first, this second cavity opening into the first capable of simultaneously transmitting waves which propagate therefrom from the two nested sources radiating in different frequency bands, one called the lower (I), the other higher (S).
  • FIG. 1 represents, seen in section through a longitudinal plane containing the electric field vector (plane E), the broadband multi-mode source described in the second cited patent application.
  • the source essentially comprises a cavity 12, the opening of which is located in the plane S, behind which a plane moder H can be placed, which will constitute, with the plane moder E, a mixed microwave source, plane E, plane H; into this cavity open four guides 9, 10, 90 and 100, adjacent in pairs, along a wall 11 for the guides in the upper position 9 and 10, and a wall 110 for the guides in the lower position 90 to 100.
  • a profiled obstacle 17 whose shape and dimensions determine a different action depending on the frequency, on the modes created in the area where the obstacle is located. This shape is such that the obstacle projects inside the cavity 12 with a decreasing section.
  • This obstacle is a paving stone of trapezoidal cross section, the large base 18 of which is in the plane P, at the level of which the moderator feed guides open, in the part situated between the upper guides 9-10 and lower guides 90-100.
  • the small base 19 is located at a distance 1 from the plane P, inside the cavity 12 and at a distance a from the wall of the cavity, distance measured parallel to the electric field E. This distance is variable when passing from small to large base.
  • the sides of the. block 17, between the large and the small base determine an angia ⁇ with the direction D perpendicular to the plane P.
  • the other dimensions of the moderator are b and c, the latter in a direction perpendicular to the plane of FIG. 1.
  • the cavity between the planes P B and S defines a transition leading to the horn 13 whose opening 16 constitutes the opening of the source.
  • a moderator in plane H can be produced using bars 14, - 140 and 15, 150 arranged perpendicular to the plane of the figure in the horn 13.
  • the operation of the source E can be recalled by referring to FIG. 1.
  • the higher modes mainly the hybrid mode EM 12
  • the excitation plane of the hybrid mode EM 12 is found in P B , which happens to be the plane of the small base of the trapezoidal block 17.
  • the bet length in phase is then L B , length between the plane P B and the plane of the opening S of the moderator.
  • the mode report module has the following expression:
  • the excitation plane of the hybrid mode EM 12 is at P H , the intermediate position between the plane P and the plane P B.
  • the phasing length is L H , distance between the plane P H and the plane of the opening S.
  • the mode ratio module takes the following expression:
  • Figure 2 shows the same notations as Figure 1, these notations being assigned the index I when they relate to elements of the set operating at lower frequency and being assigned the index S when they relate elements of the assembly operating at higher frequency.
  • the cavities 12 housing the obstacles 17 terminate in a flared part 13 defining the opening plane of the assembly at its larger end. area.
  • the plane D corresponding to the section plane of FIG. 4, the plane P S corresponding to the opening of the assembly operating at the higher frequency and the plane SI corresponding to the opening of the assembly operating at the lower frequency.
  • the entire cavity 12 S is located inside the obstacle 17 r .
  • a lens 21 is arranged in the plane S I.
  • This lens consists of parallel metal blades 22 arranged parallel to the electric field E S of the set operating at the higher frequency.
  • This lens the focus of which is situated in the plane P S, has the effect of transforming the wave emitted by the source at a higher frequency into a plane wave.
  • the diameter of the lens 21 is chosen to be greater than the opening of the beam radiated in the plane S I.
  • the plane SI is in the Rayleigh zone of the wave radiated by the assembly at a higher frequency. In practice, it is necessary to use mean frequency values of the two bands whose ratio is close to or greater than 10 so as to allow a simple mechanical realization of this condition.
  • a particular embodiment of a source according to the invention has been made using the band called band I of the order of 9 GHz as the lower frequency band and the band known as M of the order of higher frequency band 94 GHz.
  • the set in band M (new name of the band W) is calculated so that in the plane P S the parameters of the opening are respectively 16 mm and 40 mm.
  • the distance P S S I is then chosen equal to 60mm. It can be verified that under these conditions the plane S I is in the Rayleigh zone of the assembly operating in the upper frequency band M. It will be recalled that this condition is essential for the implementation of the invention.
  • the diameter of the lens 21 is then 45mm.
  • FIG. 5 schematically represents the use of a source according to the present invention in a Cassegrain type antenna.
  • the path of the wave emitted by the element operating in the lower frequency band in polarization is shown in broken line.
  • vertical and broken lines the path of the wave emitted by the element operating in the upper band in horizontal polarization.
  • a first semi-transparent reflector 30 intended to reflect the wave in the lower band is completely transparent with respect to the wave in the upper band. Since these two waves have orthogonal polarizations, this condition can be easily fulfilled by using a reflector made of conductors suitably arranged with respect to the orientations of the two electric fields.
  • the lower band wave is returned by the main reflector 31 to the right part of the figure having undergone a rotation of its polarization on the grid 33. It then passes through the semi-transparent reflector 30.
  • the upper band wave having crossed the reflector 30 without attenuation is totally reflected by reflector 32 made of solid metal.
  • the diameter of this reflector is chosen taking into account the dimension of the beam in the upper band as defined by the lens 21 of the dual-band source. All of the energy is returned to the main reflector 31 and reflected to the right of the figure without any attenuation due to the reflector 30.
  • a reflector 32 with a diameter of 80mm and a distance FF 'equal to 330mm. 33 shows the surface of the main reflector 31 rotating the plane of polarization of the lower band wave so as to allow its transmission without attenuation through the intermediate reflector 30.
  • Such embodiments are well known to man art.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)
  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Details Of Aerials (AREA)
EP82400050A 1981-01-23 1982-01-12 Hochfrequenz-Doppelbanderreger und eine Antenne mit einem solchen Erreger Expired EP0057121B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82400050T ATE26628T1 (de) 1981-01-23 1982-01-12 Hochfrequenz-doppelbanderreger und eine antenne mit einem solchen erreger.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8101286A FR2498820A1 (fr) 1981-01-23 1981-01-23 Source hyperfrequence bi-bande et antenne comportant une telle source
FR8101286 1981-01-23

Publications (3)

Publication Number Publication Date
EP0057121A2 true EP0057121A2 (de) 1982-08-04
EP0057121A3 EP0057121A3 (en) 1982-08-11
EP0057121B1 EP0057121B1 (de) 1987-04-15

Family

ID=9254452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400050A Expired EP0057121B1 (de) 1981-01-23 1982-01-12 Hochfrequenz-Doppelbanderreger und eine Antenne mit einem solchen Erreger

Country Status (8)

Country Link
US (1) US4489331A (de)
EP (1) EP0057121B1 (de)
JP (1) JPS57142005A (de)
AT (1) ATE26628T1 (de)
CA (1) CA1176368A (de)
DE (1) DE3276092D1 (de)
DK (1) DK21482A (de)
FR (1) FR2498820A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547956A1 (fr) * 1983-06-24 1984-12-28 Thomson Csf Source radar susceptible d'emettre au moins deux frequences et antenne comportant une telle source
EP0148136A1 (de) * 1983-09-14 1985-07-10 Telefonaktiebolaget L M Ericsson Monopulserreger für zwei getrennte Frequenzbereiche
US4740795A (en) * 1986-05-28 1988-04-26 Seavey Engineering Associates, Inc. Dual frequency antenna feeding with coincident phase centers

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4769646A (en) * 1984-02-27 1988-09-06 United Technologies Corporation Antenna system and dual-fed lenses producing characteristically different beams
US5003321A (en) * 1985-09-09 1991-03-26 Sts Enterprises, Inc. Dual frequency feed
US4866454A (en) * 1987-03-04 1989-09-12 Droessler Justin G Multi-spectral imaging system
US4998113A (en) * 1989-06-23 1991-03-05 Hughes Aircraft Company Nested horn radiator assembly
FR2709380B1 (fr) * 1993-08-23 1995-09-22 Alcatel Espace Antenne bi-faisceaux à balayage électronique.
FR2713404B1 (fr) * 1993-12-02 1996-01-05 Alcatel Espace Antenne orientale avec conservation des axes de polarisation.
US5455589A (en) * 1994-01-07 1995-10-03 Millitech Corporation Compact microwave and millimeter wave radar
JPH0951293A (ja) * 1995-05-30 1997-02-18 Matsushita Electric Ind Co Ltd 室内無線通信システム
US5835057A (en) * 1996-01-26 1998-11-10 Kvh Industries, Inc. Mobile satellite communication system including a dual-frequency, low-profile, self-steering antenna assembly
NL1004025C2 (nl) * 1996-09-13 1998-03-16 Hollandse Signaalapparaten Bv Werkwijze voor het bepalen van een inslagpunt van een afgevuurd projectiel ten opzichte van een doel.
CA2254139A1 (en) * 1998-01-08 1999-07-08 Nicholas L. Muhlhauser Reflector based dielectric lens antenna system
DE19838246C2 (de) * 1998-08-22 2001-01-04 Daimler Chrysler Ag Bispektrales Fenster für einen Reflektor und Reflektorantenne mit diesem bispektralen Fenster
US6243049B1 (en) * 1999-09-27 2001-06-05 Trw Inc. Multi-pattern antenna having independently controllable antenna pattern characteristics
DE60120909T2 (de) * 2001-03-22 2007-02-08 Alcatel Doppeltreflektor-Antenne mit Ablenker
US6980170B2 (en) * 2001-09-14 2005-12-27 Andrew Corporation Co-located antenna design
US6680711B2 (en) * 2002-01-08 2004-01-20 The Boeing Company Coincident transmit-receive beams plus conical scanned monopulse receive beam
US6937201B2 (en) * 2003-11-07 2005-08-30 Harris Corporation Multi-band coaxial ring-focus antenna with co-located subreflectors
US20080094298A1 (en) * 2006-10-23 2008-04-24 Harris Corporation Antenna with Shaped Asymmetric Main Reflector and Subreflector with Asymmetric Waveguide Feed
FR2909225B1 (fr) * 2006-11-29 2010-08-20 Cit Alcatel Dispositif d'alimentation d'une antenne a reflecteur
CN113206383A (zh) * 2018-07-26 2021-08-03 华为技术有限公司 一种馈源装置、双频微波天线及双频天线设备

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495262A (en) * 1969-02-10 1970-02-10 T O Paine Horn feed having overlapping apertures
US3569973A (en) * 1969-05-02 1971-03-09 North American Rockwell Constrained lens type antenna
US3665481A (en) * 1970-05-12 1972-05-23 Nasa Multi-purpose antenna employing dish reflector with plural coaxial horn feeds
FR2118848A1 (de) * 1970-12-22 1972-08-04 Thomson Csf
DE2626926A1 (de) * 1976-06-16 1977-12-29 Licentia Gmbh Verfahren zur steuerbaren strahlschwenkung bei reflektorantennen
US4096482A (en) * 1977-04-21 1978-06-20 Control Data Corporation Wide band monopulse antennas with control circuitry
FR2418551A1 (fr) * 1978-02-24 1979-09-21 Thomson Csf Source hyperfrequence multimode et antenne comportant une telle source
US4220957A (en) * 1979-06-01 1980-09-02 General Electric Company Dual frequency horn antenna system
EP0035929A1 (de) * 1980-03-07 1981-09-16 Thomson-Csf Multimode-Mikrowellenerreger und Antenne mit einem solchen Erreger

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425488A (en) * 1943-07-03 1947-08-12 Rca Corp Horn antenna
GB1368879A (en) * 1972-06-08 1974-10-02 Standard Telephones Cables Ltd Waveguide antenna

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495262A (en) * 1969-02-10 1970-02-10 T O Paine Horn feed having overlapping apertures
US3569973A (en) * 1969-05-02 1971-03-09 North American Rockwell Constrained lens type antenna
US3665481A (en) * 1970-05-12 1972-05-23 Nasa Multi-purpose antenna employing dish reflector with plural coaxial horn feeds
FR2118848A1 (de) * 1970-12-22 1972-08-04 Thomson Csf
DE2626926A1 (de) * 1976-06-16 1977-12-29 Licentia Gmbh Verfahren zur steuerbaren strahlschwenkung bei reflektorantennen
US4096482A (en) * 1977-04-21 1978-06-20 Control Data Corporation Wide band monopulse antennas with control circuitry
FR2418551A1 (fr) * 1978-02-24 1979-09-21 Thomson Csf Source hyperfrequence multimode et antenne comportant une telle source
US4220957A (en) * 1979-06-01 1980-09-02 General Electric Company Dual frequency horn antenna system
EP0035929A1 (de) * 1980-03-07 1981-09-16 Thomson-Csf Multimode-Mikrowellenerreger und Antenne mit einem solchen Erreger

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FREQUENZ, vol. 29, no. 7, juillet 1975, Berlin (DE) G. VON TRENTINI: "Ubersicht der heute in der Technik verwendeten stark buendelnden Mikrowellenantennen (Teil II)" Pages 192-199 *
REVUE TECHNIQUE CFTH, vol.37, novembre 1962, PARIS (FR) S. DRABOWITCH: "Theorie et applications des antennes multimodes", pages 117-168 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547956A1 (fr) * 1983-06-24 1984-12-28 Thomson Csf Source radar susceptible d'emettre au moins deux frequences et antenne comportant une telle source
EP0130111A1 (de) * 1983-06-24 1985-01-02 Thomson-Csf Doppelfrequenzradarstrahler und Antenne mit einem solchen Strahler
EP0148136A1 (de) * 1983-09-14 1985-07-10 Telefonaktiebolaget L M Ericsson Monopulserreger für zwei getrennte Frequenzbereiche
US4740795A (en) * 1986-05-28 1988-04-26 Seavey Engineering Associates, Inc. Dual frequency antenna feeding with coincident phase centers

Also Published As

Publication number Publication date
ATE26628T1 (de) 1987-05-15
US4489331A (en) 1984-12-18
DE3276092D1 (en) 1987-05-21
FR2498820A1 (fr) 1982-07-30
DK21482A (da) 1982-07-24
FR2498820B1 (de) 1985-01-04
JPS57142005A (en) 1982-09-02
CA1176368A (en) 1984-10-16
EP0057121A3 (en) 1982-08-11
EP0057121B1 (de) 1987-04-15

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