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GB1410632A - Antennas with dish reflectors - Google Patents

Antennas with dish reflectors

Info

Publication number
GB1410632A
GB1410632A GB633472A GB633472A GB1410632A GB 1410632 A GB1410632 A GB 1410632A GB 633472 A GB633472 A GB 633472A GB 633472 A GB633472 A GB 633472A GB 1410632 A GB1410632 A GB 1410632A
Authority
GB
United Kingdom
Prior art keywords
reflector
main reflector
secondary reflector
main
shape
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
GB633472A
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.)
C&S Antennas Ltd
Original Assignee
C&S Antennas Ltd
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 C&S Antennas Ltd filed Critical C&S Antennas Ltd
Priority to GB633472A priority Critical patent/GB1410632A/en
Publication of GB1410632A publication Critical patent/GB1410632A/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
    • H01Q19/18—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 having two or more spaced reflecting surfaces
    • H01Q19/19—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 having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface

Landscapes

  • Optical Elements Other Than Lenses (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

1410632 Aerials C & S ANTENNAS Ltd 10 May 1973 [10 Feb 1972] 6334/72 Heading H4A [Also in Division B3] In an aerial of the kind in which a secondary reflector faces a main reflector, any manufacturing distortions from a predetermined geometrical form which are present in the surface of the main reflector are at least partially compensated for by providing complementary distortions in the surface of the secondary reflector. As described, an aerial comprises a primary horn radiator 3, a hyperboloidal secondary reflector 4, and a paraboloidal main reflector 1. A structure 2 supports the horn and the main reflector, and arms 5 extending therefrom support the secondary reflector. The difference between the actual shape of the main reflector 1 and a true paraboloid is determined by measurements made, for example, by vernier or micrometer probes, or by a laser range-finding technique. Knowing the errors in the shape of the main reflector, a complementary shape for the secondary reflector may be computed, preferably digitally, using either ray tracing geometrical optical theory, or wave theory. In many cases distortion of the main reflector is circularly symmetrical, so that the surface of the secondary reflector may be shaped in a turning operation. Alternatively, the secondary reflector may be machined utilizing a machine tool with three-axis numerical control, e.g. some form of erosion machining tool.
GB633472A 1972-02-10 1972-02-10 Antennas with dish reflectors Expired GB1410632A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB633472A GB1410632A (en) 1972-02-10 1972-02-10 Antennas with dish reflectors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB633472A GB1410632A (en) 1972-02-10 1972-02-10 Antennas with dish reflectors

Publications (1)

Publication Number Publication Date
GB1410632A true GB1410632A (en) 1975-10-22

Family

ID=9812603

Family Applications (1)

Application Number Title Priority Date Filing Date
GB633472A Expired GB1410632A (en) 1972-02-10 1972-02-10 Antennas with dish reflectors

Country Status (1)

Country Link
GB (1) GB1410632A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195302A (en) * 1976-06-25 1980-03-25 Siemens Aktiengesellschaft Double reflector antenna with feed horn protection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195302A (en) * 1976-06-25 1980-03-25 Siemens Aktiengesellschaft Double reflector antenna with feed horn protection

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee