EP0065467B1 - Radiateur d'onde électromagnétique polarisée circulairement - Google Patents

Radiateur d'onde électromagnétique polarisée circulairement Download PDF

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Publication number
EP0065467B1
EP0065467B1 EP82400899A EP82400899A EP0065467B1 EP 0065467 B1 EP0065467 B1 EP 0065467B1 EP 82400899 A EP82400899 A EP 82400899A EP 82400899 A EP82400899 A EP 82400899A EP 0065467 B1 EP0065467 B1 EP 0065467B1
Authority
EP
European Patent Office
Prior art keywords
guide
dipole
waveguide
radiating
feed lines
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
EP82400899A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0065467A1 (fr
Inventor
Albert Dupressoir
François Salvat
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 EP0065467A1 publication Critical patent/EP0065467A1/fr
Application granted granted Critical
Publication of EP0065467B1 publication Critical patent/EP0065467B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • H01Q9/06—Details
    • H01Q9/065—Microstrip dipole antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction

Definitions

  • the present invention relates to a circularly polarized electromagnetic wave radiator. It preferably operates in the microwave domain and can be used as a primary source illuminating a focusing optical system or as a radiating element of an array antenna.
  • such a wave radiator is constituted by two complementary sources nested one inside the other.
  • the two sources are a dipole 1 photo-etched on a dielectric plate 2 placed in the median longitudinal plane ⁇ of a waveguide 3 (with rectangular carrying section) and two waveguides 4 and 5, produced at starting from the waveguide 3 divided into two guides of reduced height, by the plate 2.
  • These two guides 4 and 5 are excited by plungers 6, connected to a supply line 7 while the dipole 1 is connected to its supply line 8 by a balun 9.
  • the object of the present invention is to produce a circularly polarized electromagnetic wave radiator, avoiding the cited drawbacks of the prior art.
  • Document FR-A-2 452 804 also describes a radiating dipole excited by an extra-flat waveguide, having the advantage of a very small footprint, appreciable in particular in the production of an antenna with electronic scanning.
  • the aim of this document is not to produce a source radiating a circular wave from two sources each radiating a rectilinear wave but to produce a radiating dipole alone.
  • the shape of the radiation diagram, in the E plane, of this radiating element is in particular close to that given by a conventional dipole of the half-wave type supplied by a two-wire line.
  • the waveguide is extra-flat to considerably reduce the size of the module thus formed but must not radiate a wave by itself.
  • the present invention relates to a circularly polarized electromagnetic wave radiator, as defined in the claims.
  • FIGS. 2 and 3 represent two nonlimiting examples of a circularly polarized wave radiator.
  • This phase quadrature is performed when the two phase centers of the two complementary antennas are combined.
  • Fig. 2 shows an embodiment of a circular polarized wave radiator made up of two complementary sources, a waveguide 8 and a dipole 9, each emitting a wave with rectilinear polarization.
  • the supply lines 11 of the strands of the dipole 9, each constituted by a metal tab, are located in the extension of the two long sides of the guide, symmetrically with respect to the longitudinal axis A of symmetry of the guide.
  • the strands 13 of the dipole are constituted by metal strips perpendicular to the supply lines 11 in contact with them, located in the plane of the long sides of the waveguide. The dimensions of the lines 11 help the impedance matching between the dipole and the waveguide.
  • the dipole 9 is excited directly by the waveguide 8 and the coincidence of the two phase centers of these sources is made possible by the presence of a metal edge 14, placed around the periphery of the radiating opening 10 of the guide and perpendicular to the four sides of this guide.
  • a metal edge 14 placed around the periphery of the radiating opening 10 of the guide and perpendicular to the four sides of this guide.
  • the phase center of the waveguide 8 is in the plane of its radiating opening 10 and the phase center of the dipole 9 provided with the reflective element constituted by the metal edge 14 is in the plane of the latter. Ci, so well in the plane of the opening of the guide.
  • the waveguide 15 is constituted by a parallelepipedic block 16 of dielectric material, metallized on its four faces parallel to the longitudinal axis of symmetry A ′, over a length L ′ less than the length L of the dielectric block itself even.
  • the supply lines 17 of the strands 18 of the dipole 19 are metal tabs, deposited by photoengraving on the dielectric block 16, in the extension of the two larger faces of the waveguide.
  • the strands 18 of the dipole they are constituted by the extension of the tongues constituting the supply lines, but arranged perpendicularly to these.
  • the dimensions of the waveguide 15 are such that the level of the polarization of the wave emitted by the latter is equal to that of the polarization of the wave emitted by the dipole 19. Unlike in FIG. 2, where the transition between the supply lines and the strands of the dipole is abrupt, in FIG. 3 the transition is very gradual.
  • the reflective element 20, associated with the dipole is constituted by a metallic periphery, placed at 90 ° to the sides of the waveguide and bonded to the metallization of the latter.
  • the strands of the dipole may have a length equal to a quarter or a half or to the wavelength at the central frequency of the operating band of this dipole.
  • the rectangular section waveguide has the internal dimensions 72, 15 mm x 28.4 mm; the radiating element is constituted by metal edges 22 mm wide placed perpendicular to the two largest faces of the guide and 10 mm wide for those placed perpendicular to the other two faces.
  • the supply lines and the strands of the dipole are made of brass, 2 mm thick, their respective lengths being close to a quarter and a half wavelength at the central frequency of the operating band of the dipole.
  • the cross section of the waveguide constituting the wave radiator can be both rectangular and square, provided that the propagation mode in the guide is the fundamental mode.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP82400899A 1981-05-15 1982-05-14 Radiateur d'onde électromagnétique polarisée circulairement Expired EP0065467B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8109760A FR2506082A1 (fr) 1981-05-15 1981-05-15 Radiateur d'onde electromagnetique polarisee circulairement
FR8109760 1981-05-15

Publications (2)

Publication Number Publication Date
EP0065467A1 EP0065467A1 (fr) 1982-11-24
EP0065467B1 true EP0065467B1 (fr) 1986-07-16

Family

ID=9258531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400899A Expired EP0065467B1 (fr) 1981-05-15 1982-05-14 Radiateur d'onde électromagnétique polarisée circulairement

Country Status (4)

Country Link
US (1) US4502053A (enrdf_load_stackoverflow)
EP (1) EP0065467B1 (enrdf_load_stackoverflow)
DE (1) DE3272004D1 (enrdf_load_stackoverflow)
FR (1) FR2506082A1 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4782346A (en) * 1986-03-11 1988-11-01 General Electric Company Finline antennas
US4879563A (en) * 1987-10-30 1989-11-07 Kyocera Corporation Circularly polarized complementary antenna with patch and dipole elements
US4905013A (en) * 1988-01-25 1990-02-27 United States Of America As Represented By The Secretary Of The Navy Fin-line horn antenna
US4870426A (en) * 1988-08-22 1989-09-26 The Boeing Company Dual band antenna element
JP3739637B2 (ja) * 2000-07-27 2006-01-25 アルプス電気株式会社 一次放射器
DE102007037614B4 (de) * 2007-08-09 2014-03-13 Continental Automotive Gmbh Mehrteilige Antenne mit zirkularer Polarisation
TWI590519B (zh) * 2012-08-27 2017-07-01 鴻海精密工業股份有限公司 整合於金屬殼體的天線結構
US20140062812A1 (en) * 2012-08-30 2014-03-06 Cambridge Silicon Radio Limited Multi-antenna isolation

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB787756A (en) * 1955-06-02 1957-12-18 Marconi Wireless Telegraph Co Improvements in or relating to wave guide mouth structures for projecting beams of electro-magnetic waves
US2946055A (en) * 1958-12-29 1960-07-19 Sylvania Electric Prod Parasitic dipole slot antenna
US3382501A (en) * 1965-09-22 1968-05-07 Hughes Aircraft Co Elliptically or circularly polarized antenna
US3623112A (en) * 1969-12-19 1971-11-23 Bendix Corp Combined dipole and waveguide radiator for phased antenna array
US4063248A (en) * 1976-04-12 1977-12-13 Sedco Systems, Incorporated Multiple polarization antenna element
FR2452804A1 (fr) * 1979-03-28 1980-10-24 Thomson Csf Source rayonnante constituee par un dipole excite par un guide d'onde, et antenne a balayage electronique comportant de telles sources
GB2058468B (en) * 1979-08-23 1983-10-12 Marconi Co Ltd Dual frequency aerial feed arrangement

Also Published As

Publication number Publication date
US4502053A (en) 1985-02-26
FR2506082A1 (fr) 1982-11-19
DE3272004D1 (en) 1986-08-21
EP0065467A1 (fr) 1982-11-24
FR2506082B1 (enrdf_load_stackoverflow) 1985-05-03

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