EP0045254B1 - Source rayonnante bi-bande compacte fonctionnant dans le domaine des hyperfréquences - Google Patents

Source rayonnante bi-bande compacte fonctionnant dans le domaine des hyperfréquences Download PDF

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Publication number
EP0045254B1
EP0045254B1 EP81401185A EP81401185A EP0045254B1 EP 0045254 B1 EP0045254 B1 EP 0045254B1 EP 81401185 A EP81401185 A EP 81401185A EP 81401185 A EP81401185 A EP 81401185A EP 0045254 B1 EP0045254 B1 EP 0045254B1
Authority
EP
European Patent Office
Prior art keywords
source
radiating
reflector
double band
reflecting device
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
Application number
EP81401185A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0045254A1 (fr
Inventor
Albert Dupressoir
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
Publication of EP0045254A1 publication Critical patent/EP0045254A1/fr
Application granted granted Critical
Publication of EP0045254B1 publication Critical patent/EP0045254B1/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/001—Crossed polarisation dual 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 compact dual-band radiating source operating in the microwave domain. It can be used as a primary source illuminating a focusing optical system or as a radiating element directly, alone or as part of an array antenna with electronic scanning.
  • a radiating source operating in two distinct frequency bands was constituted for example by two distinct elementary sources each operating in a band but both associated with the same reflector produced in the form of a dihedral, as shown in FIG. 1. in fact there is a dipole 1 whose direction of the strands is parallel to the edge 2 of the common dihedral reflector 3, and two other dipoles 4 and 5, located on either side of the dipole 1 for reasons of symmetry and whose the direction of the strands is perpendicular to that of the strands of the dipole 1.
  • the dipole 1 on the one hand and the two dipoles 4 and 5 on the other hand have crossed polarizations with respect to each other and it is conceivable easily that when such a dual-band radiating source must illuminate a focusing optical system, a parabolic reflector for example, the phase centers of the two sets, one constituted by the dipole 1 and the reflector 3 and the other by the dipoles 4 and 5 and the reflector 3 cannot both be confused with the focal point of this optical system. In this case, the aberration phenomena do not make it possible to obtain the best possible radiation from such a dual-band source.
  • such a source may include two wave radiators, placed side by side, emitting and / or receiving waves at different wavelengths, in two orthogonal polarization directions, and two reflectors placed one behind the other.
  • One of these two reflectors is constituted by a semi-transparent grid while the other reflector is completely reflective and constituted by a metallic foil for example.
  • the two wave radiators which are, for example, waveguides, do not have their phase centers combined, which leads to degradations in the radiation of the dual-band source.
  • the object of the invention is to remedy such drawbacks and to produce a compact radiating source, operating in two distinct frequency bands.
  • this compact dual-band radiating source operating in the microwave domain comprises two radiating source-reflector assemblies, the first assembly being constituted by a system of dipoles tuned to the frequency band whose central frequency is the higher of the two and radiating a determined polarization wave, associated with a semi-transparent reflector device, the second set being constituted by a system of dipoles radiating a polarization wave crossed with respect to the previous associated with a fully reflective device , the relative position of these two sets with respect to each other being such that their phase centers are combined.
  • FIGS. 2, 3, 4 and 5 which, in addition to FIG. 1 already described, represent nonlimiting exemplary embodiments of a radiating source bi -strip according to the invention.
  • FIG. 2 represents a dual-band radiating source which comprises two distinct radiating assemblies; the first consists of a dipole 6, tuned to the band with the highest central frequency, associated with a semi-transparent reflecting device 7 and the second set consists of two dipoles 8 and 9 associated with a second reflecting device 10
  • the dipole 6 radiates a wave of determined polarization, for which the reflector device 7 is transparent but which is reflected by the reflector 10.
  • the dipoles 8 and 9 radiate a wave whose polarization is crossed with respect to the previous one, so that the reflector 7 reflects it completely.
  • the semi-transparent reflector 7 is constituted by a network of parallel metallic wires 11, the direction of which is perpendicular to that of the strands 12 of the dipole 6, therefore to the polarization of the wave which it transmits.
  • the reflector 10 is constituted by a network of parallel metallic wires 13 whose direction is parallel to that of the strands 12 of the dipole 6 in order to totally reflect the wave emitted by the latter.
  • this reflector 10 can also be produced by a network of crossed metal wires or by a surface with continuous metallization.
  • the reflector 10 is very structured and the network of wires 13 is produced on a wafer of dielectric material.
  • the latter carries metal inserts 14 used for fixing the source, serves as a plane for laying the dipoles and supports the power device integrated in its rear volume.
  • the semi-transparent reflector 7 lets pass the wave radiated by the dipole 6 with which it is associated; but in another exemplary embodiment, it will on the contrary be completely reflective for this wave and will let pass the wave emitted by the other dipoles and in which the polarization is crossed with respect to the first.
  • the semi-transparent reflector must be associated with the system of radiating dipoles tuned on the frequency band whose central frequency is the highest.
  • the semi-transparent reflector device is made in the form of a dihedral 15, constituted by two planes 16 and 17 having a common edge 18.
  • the dipole associated with this reflector in the form of a dihedral is such that the direction of its strands is parallel to the edge of the dihedral.
  • the wires 21 of the reflector 15 being orthogonal to the direction of the strands 20 of the dipole 19, the wave emitted by the latter passes through the dihedral without reflection, before being reflected on the reflector device 22, which is constituted by a network of parallel wires 23 of direction parallel to that of the strands 20.
  • the relative position of the two radiating source-reflector assemblies makes it possible to make their two phase centers coincide in order to obtain the best radiation conditions of the source.
  • the volume encompassing the two source-reflector assemblies that is to say comprised between the reflector 22, the plane passing through the outer edges 24 and 25 of the dihedral 15 and parallel to the plane 22 and the four planes perpendicular to each other and to plane 22 can be filled with low density polyurethane foam.
  • the network of parallel metallic wires 21, constituting the semi-transparent reflector 15 in the form of a dihedral, is obtained by the photoengraving process used in the technology for manufacturing printed circuits.
  • the distance between the edge 18 of the dihedral and the strands 20 of the dipole 19 is equal to 0.6 J, J being the wavelength at the central frequency 1250 MHz and the angle of the dihedral is 90 °.
  • the two other dipoles 30 and 31 are supplied in phase or in phase opposition via an energy distributor of the "hybrid ring 6 / ⁇ / 4" type.
  • the flat reflector 22 is constituted by a metallized dielectric plate and the distance which separates it from the strands of the dipoles 30 and 31 is equal to 0.25 J ′, /! being the wavelength at the central frequency 1000 MHz.
  • FIG. 4 is shown another exemplary embodiment of the invention, in which the two radiating dipole systems consist only of a single dipole 26 and 27 of each of the two polarizations. To respect the symmetry of the source, necessary to make the two phase centers coincide, these two dipoles must be centered. For this, they are mounted on a single foot 28 common to both but are supplied by two separate coaxial lines 37 and 38, each connected to one of the strands 39 and 40 of the two dipoles.
  • the shape of the reflectors is arbitrary, in other words the semi-transparent reflector 29 can be in the form of a dihedral or a plane just like the reflector 300, the remarks concerning their relative position being the same as above.
  • FIG. 6 represents another embodiment of the invention, in which the reflector 41 in the form of a dihedral is placed so that its edge 42 is situated behind the plane reflector 43.
  • a dipole 44 whose strands are parallel to the edge 42 and to the plane reflector 43 are associated two dipoles 45 and 46 of cross polarization with respect to that of the dipole 44.
  • the part of the plane reflector 43 located in front of the edge 42 must necessarily be semi-transparent to let pass the wave emitted by one of the two radiating dipole systems, that is to say by the dipole 44 in the precise case of this figure.
  • the other part of this reflector like the dihedral reflector 41 itself, can be constituted by solid metal plates or by polarizing networks depending on the desired objective.
  • the polarizing systems constituted by arrays of metal wires can be photo-etched on plates of dielectric material. These networks of wires can also be replaced by more rigid parallel metal blades.
  • the remarks concerning the relative position of the two radiant source-reflector assemblies, their practical realization and the addition of polyurethane foam like that of a radome are also valid in all these cases.
  • a compact dual-band radiating source has thus been described, which can be used as a radiating element directly alone or as part of an antenna with electronic scanning.
  • this source can also illuminate a focusing optical system, the position of which with respect to the two radiating source-reflector assemblies which constitute it is such that the focus of this optical system coincides with their two phase centers.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP81401185A 1980-07-29 1981-07-24 Source rayonnante bi-bande compacte fonctionnant dans le domaine des hyperfréquences Expired EP0045254B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8016712 1980-07-29
FR8016712A FR2488058A1 (fr) 1980-07-29 1980-07-29 Source rayonnante bi-bande compacte fonctionnant dans le domaine des hyperfrequences

Publications (2)

Publication Number Publication Date
EP0045254A1 EP0045254A1 (fr) 1982-02-03
EP0045254B1 true EP0045254B1 (fr) 1985-10-02

Family

ID=9244663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401185A Expired EP0045254B1 (fr) 1980-07-29 1981-07-24 Source rayonnante bi-bande compacte fonctionnant dans le domaine des hyperfréquences

Country Status (3)

Country Link
EP (1) EP0045254B1 (enrdf_load_stackoverflow)
DE (1) DE3172526D1 (enrdf_load_stackoverflow)
FR (1) FR2488058A1 (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063678B1 (de) * 1981-04-29 1985-08-21 F. HOFFMANN-LA ROCHE & CO. Aktiengesellschaft Verfahren zur Herstellung von Cholesterinderivaten und Zwischenprodukte dafür
US5485167A (en) * 1989-12-08 1996-01-16 Hughes Aircraft Company Multi-frequency band phased-array antenna using multiple layered dipole arrays
FR2664750B1 (fr) * 1990-07-11 1993-01-29 Aerospatiale Bireflecteur a grilles.
GB2264006B (en) * 1992-02-01 1995-09-27 British Aerospace Space And Co A reflector antenna assembly for dual linear polarisation
KR0185962B1 (ko) * 1995-03-03 1999-05-15 구관영 안테나 측면 복사에너지를 최소화한 안테나
FR2787928A1 (fr) * 1998-12-23 2000-06-30 Thomson Csf Antenne a reflecteur large bande
US6448937B1 (en) 2000-04-25 2002-09-10 Lucent Technologies Inc. Phased array antenna with active parasitic elements
RU2185696C1 (ru) * 2001-04-28 2002-07-20 Энианс Ко. Лтд. Уголковая антенна
WO2002097923A1 (en) * 2001-04-28 2002-12-05 Anyans Corner antenna
US6795021B2 (en) 2002-03-01 2004-09-21 Massachusetts Institute Of Technology Tunable multi-band antenna array
US8345639B2 (en) 2010-06-14 2013-01-01 Raytheon Company Broad propagation pattern antenna
FR3075390B1 (fr) * 2017-12-20 2020-09-18 Selerys Systeme de detection interferometrique de foudre

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2790169A (en) * 1949-04-18 1957-04-23 Itt Antenna
GB758957A (en) * 1954-03-23 1956-10-10 British Thomson Houston Co Ltd Improvements relating to ultra-high frequency aerials
US2982961A (en) * 1957-03-20 1961-05-02 Calvin C Jones Dual feed antenna
DE2454401A1 (de) * 1974-11-16 1976-05-20 Licentia Gmbh Breitbandantenne kleiner abmessungen

Also Published As

Publication number Publication date
FR2488058B1 (enrdf_load_stackoverflow) 1984-07-13
DE3172526D1 (en) 1985-11-07
EP0045254A1 (fr) 1982-02-03
FR2488058A1 (fr) 1982-02-05

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