GB1219872A - Improvements in or relating to electro-magnetic radiators - Google Patents

Improvements in or relating to electro-magnetic radiators

Info

Publication number
GB1219872A
GB1219872A GB1525469A GB1525469A GB1219872A GB 1219872 A GB1219872 A GB 1219872A GB 1525469 A GB1525469 A GB 1525469A GB 1525469 A GB1525469 A GB 1525469A GB 1219872 A GB1219872 A GB 1219872A
Authority
GB
United Kingdom
Prior art keywords
aperture
recesses
limiter
waveguide
fed
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
GB1525469A
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.)
CO EL COMPLEMENTI ELETRONICI S
Original Assignee
CO EL COMPLEMENTI ELETRONICI S
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 CO EL COMPLEMENTI ELETRONICI S filed Critical CO EL COMPLEMENTI ELETRONICI S
Publication of GB1219872A publication Critical patent/GB1219872A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/06—Waveguide mouths
    • H01Q13/065—Waveguide mouths provided with a flange or a choke

Abstract

1,219,872. Aerials. CO. EL. COMPLEMENTI ELETTRONICI S.p.A. 24 March, 1969 [6 April, 1968], No. 15254/69. Heading H4A. A device for use with a horn radiator 10, in order to improve the distribution of energy over the surface of an associated reflector, comprises a plane-faced member having a radiating aperture 18 therein which is fed by a waveguide 11 and which is surrounded by a plurality of radiation limiters 19. The limiters consist of coaxial annular recesses 20, 20<SP>1</SP>, 20<SP>11</SP> &c. having open apertures, which are coplanar with the aperture 18, and defining baffles 21, 21<SP>1</SP>, 21<SP>11</SP> &c. The recesses are #/4 deep (# = mean operating wavelength), and are closed at their ends remote from the aperture 18. The radial thicknesses of the recesses are made such that their characteristic impedances do not decrease outwardly from the central axis of the horn, and so that the characteristic impedance of the outermost limiter is greater than that of the innermost limiter. The waveguide 11 may be fed from two cross-polarized sources, for the simultaneous transmission of two decoupled waves (Fig. 2, not shown).
GB1525469A 1968-04-06 1969-03-24 Improvements in or relating to electro-magnetic radiators Expired GB1219872A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT829780 1968-04-06

Publications (1)

Publication Number Publication Date
GB1219872A true GB1219872A (en) 1971-01-20

Family

ID=11126285

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1525469A Expired GB1219872A (en) 1968-04-06 1969-03-24 Improvements in or relating to electro-magnetic radiators

Country Status (1)

Country Link
GB (1) GB1219872A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168504A (en) * 1978-01-27 1979-09-18 E-Systems, Inc. Multimode dual frequency antenna feed horn
US4554552A (en) * 1981-12-21 1985-11-19 Gamma-F Corporation Antenna feed system with closely coupled amplifier
US4622559A (en) * 1984-04-12 1986-11-11 Canadian Patents & Development Limited Paraboloid reflector antenna feed having a flange with tapered corrugations
US4658258A (en) * 1983-11-21 1987-04-14 Rca Corporation Taperd horn antenna with annular choke channel
US4761655A (en) * 1984-11-30 1988-08-02 British Telecommunications Plc Transportable antenna for an earth station
US4797681A (en) * 1986-06-05 1989-01-10 Hughes Aircraft Company Dual-mode circular-polarization horn
US6097348A (en) * 1998-05-19 2000-08-01 Victory Industrial Corporation Compact waveguide horn antenna and method of manufacture
EP1037305A2 (en) * 1999-03-16 2000-09-20 TRW Inc. Dual depth aperture chokes for dual frequency horn equalizing E and H-plane patterns
WO2010123634A1 (en) * 2009-04-23 2010-10-28 Andrew Llc Monolithic microwave antenna feed and method of manufacture

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168504A (en) * 1978-01-27 1979-09-18 E-Systems, Inc. Multimode dual frequency antenna feed horn
US4554552A (en) * 1981-12-21 1985-11-19 Gamma-F Corporation Antenna feed system with closely coupled amplifier
US4658258A (en) * 1983-11-21 1987-04-14 Rca Corporation Taperd horn antenna with annular choke channel
US4622559A (en) * 1984-04-12 1986-11-11 Canadian Patents & Development Limited Paraboloid reflector antenna feed having a flange with tapered corrugations
US4761655A (en) * 1984-11-30 1988-08-02 British Telecommunications Plc Transportable antenna for an earth station
US4797681A (en) * 1986-06-05 1989-01-10 Hughes Aircraft Company Dual-mode circular-polarization horn
US6097348A (en) * 1998-05-19 2000-08-01 Victory Industrial Corporation Compact waveguide horn antenna and method of manufacture
EP1037305A2 (en) * 1999-03-16 2000-09-20 TRW Inc. Dual depth aperture chokes for dual frequency horn equalizing E and H-plane patterns
EP1037305A3 (en) * 1999-03-16 2002-10-02 TRW Inc. Dual depth aperture chokes for dual frequency horn equalizing E and H-plane patterns
WO2010123634A1 (en) * 2009-04-23 2010-10-28 Andrew Llc Monolithic microwave antenna feed and method of manufacture
US8681066B2 (en) 2009-04-23 2014-03-25 Andrew Llc Monolithic microwave antenna feed and method of manufacture

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