GB814355A - Improvements in or relating to very short wave aerial systems - Google Patents

Improvements in or relating to very short wave aerial systems

Info

Publication number
GB814355A
GB814355A GB30219/57A GB3021957A GB814355A GB 814355 A GB814355 A GB 814355A GB 30219/57 A GB30219/57 A GB 30219/57A GB 3021957 A GB3021957 A GB 3021957A GB 814355 A GB814355 A GB 814355A
Authority
GB
United Kingdom
Prior art keywords
horns
reflector
patterns
pattern
illuminate
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
GB30219/57A
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
CSF Compagnie Generale de Telegraphie sans Fil 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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB814355A publication Critical patent/GB814355A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
    • H01Q19/17—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source comprising two or more radiating elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
    • H01Q19/08—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens for modifying the radiation pattern of a radiating horn in which it is located

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

814,355. Aerials. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Sept. 26, 1957 [Oct. 1, 1956]. No. 30219/57. Class 40 (7). An aerial system for horizontally polarized energy designed to have a radiation polar diagram which, in the vertical plane, approximates to a cosecant squared curve, consists of a parabolic reflector 5 fed by a plurality of radio horns 1 to 4, means being provided in the mouths of the horns to narrow their individual polar diagrams to give the required resultant radiation pattern. As shown, the horns are placed closely adjacent to each other in the focal plane of the reflector; all being directed to illuminate the same zone. They are fed to illuminate the reflector in phase. If, as is known, the horns are used without modification to feed the reflector, the width of their primary patterns is such that their individual secondary patterns are too sharp and do not overlap adequately, thus giving marked low intensity regions in the resulting composite pattern. In the preferred embodiment of the invention, each horn has a metallic rod conductor 7 placed centrally across its mouth parallel to the electric vector and is provided with a dielectric member shaped as a segment of a cylinder with its flat face in, and covering, the horn mouth. These elements narrow the primary patterns of the horns and the individual secondary patterns are correspondingly broadened to give a smoother composite cosecsquared pattern.
GB30219/57A 1956-10-01 1957-09-26 Improvements in or relating to very short wave aerial systems Expired GB814355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1158932T 1956-10-01

Publications (1)

Publication Number Publication Date
GB814355A true GB814355A (en) 1959-06-03

Family

ID=9651308

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30219/57A Expired GB814355A (en) 1956-10-01 1957-09-26 Improvements in or relating to very short wave aerial systems

Country Status (2)

Country Link
FR (1) FR1158932A (en)
GB (1) GB814355A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156243A (en) * 1977-10-14 1979-05-22 Rca Corporation Paraboloid reflector antenna
US4187508A (en) * 1976-09-10 1980-02-05 Westinghouse Electric Corp. Reflector antenna with plural feeds at focal zone
GB2262387A (en) * 1991-12-09 1993-06-16 Alcatel Espace Multibeam antenna
EP1296411A2 (en) * 2001-09-21 2003-03-26 Alps Electric Co., Ltd. Converter for receiving satellite broadcast signals from a plurality of satellites

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4187508A (en) * 1976-09-10 1980-02-05 Westinghouse Electric Corp. Reflector antenna with plural feeds at focal zone
US4156243A (en) * 1977-10-14 1979-05-22 Rca Corporation Paraboloid reflector antenna
GB2262387A (en) * 1991-12-09 1993-06-16 Alcatel Espace Multibeam antenna
GB2262387B (en) * 1991-12-09 1996-01-10 Alcatel Espace A multibeam antenna
EP1296411A2 (en) * 2001-09-21 2003-03-26 Alps Electric Co., Ltd. Converter for receiving satellite broadcast signals from a plurality of satellites
EP1296411A3 (en) * 2001-09-21 2003-05-14 Alps Electric Co., Ltd. Converter for receiving satellite broadcast signals from a plurality of satellites
EP1339135A2 (en) * 2001-09-21 2003-08-27 Alps Electric Co., Ltd. Converter for receiving satellite broadcast signals from a plurality of satellites
EP1339135A3 (en) * 2001-09-21 2003-09-10 Alps Electric Co., Ltd. Converter for receiving satellite broadcast signals from a plurality of satellites
US6963726B2 (en) 2001-09-21 2005-11-08 Alps Electric Co., Ltd. Satellite broadcasting receiving converter for receiving radio waves from plurality of satellites

Also Published As

Publication number Publication date
FR1158932A (en) 1958-06-20

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