GB976750A - Improvements in or relating to directional aerials - Google Patents

Improvements in or relating to directional aerials

Info

Publication number
GB976750A
GB976750A GB1956761A GB1956761A GB976750A GB 976750 A GB976750 A GB 976750A GB 1956761 A GB1956761 A GB 1956761A GB 1956761 A GB1956761 A GB 1956761A GB 976750 A GB976750 A GB 976750A
Authority
GB
United Kingdom
Prior art keywords
reflector
assembly
axis
lens
horn radiator
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
GB1956761A
Inventor
Sidney Cornbleet
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1956761A priority Critical patent/GB976750A/en
Publication of GB976750A publication Critical patent/GB976750A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/001—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems for modifying the directional characteristic of an aerial
    • 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

Landscapes

  • Aerials With Secondary Devices (AREA)

Abstract

976,750. Aerials. THE GENERAL ELECTRIC CO. Ltd. May 30, 1962 [May 30, 1961], No. 19567/61. Heading H4A. A wideband directional aerial assembly having a constant beam-width comprises a horn radiator 2 situated on the axis (but not at the focus 4) of a parabolic reflector 1, and a dispersive cellular lens 5 also positioned on the reflector axis. As shown, the assembly is housed within a rubber-lined tubular casing 6 closed at one end by the reflector 1 and at the other end by a fibre glass sheet 8. The beamwidth of the horn radiator 2 varies with frequency over the operating band (9000 mc/s.Π1800 mc/s.) but this variation in beam-width is compensated for by the changes in curvature of the wave fronts of the beam produced by the reflector and the lens, the arrangement being such that at the lower frequency end of the band said changes substantially cancel one another out. The assembly may also be used as a receiving aerial.
GB1956761A 1961-05-30 1961-05-30 Improvements in or relating to directional aerials Expired GB976750A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1956761A GB976750A (en) 1961-05-30 1961-05-30 Improvements in or relating to directional aerials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1956761A GB976750A (en) 1961-05-30 1961-05-30 Improvements in or relating to directional aerials

Publications (1)

Publication Number Publication Date
GB976750A true GB976750A (en) 1964-12-02

Family

ID=10131542

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1956761A Expired GB976750A (en) 1961-05-30 1961-05-30 Improvements in or relating to directional aerials

Country Status (1)

Country Link
GB (1) GB976750A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0773598A3 (en) * 1995-11-07 1997-06-11 Denso Corporation Aperture antenna

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0773598A3 (en) * 1995-11-07 1997-06-11 Denso Corporation Aperture antenna

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