GB1190566A - Aerials - Google Patents

Aerials

Info

Publication number
GB1190566A
GB1190566A GB29956/66A GB2995666A GB1190566A GB 1190566 A GB1190566 A GB 1190566A GB 29956/66 A GB29956/66 A GB 29956/66A GB 2995666 A GB2995666 A GB 2995666A GB 1190566 A GB1190566 A GB 1190566A
Authority
GB
United Kingdom
Prior art keywords
reflector
axis
feed device
sub
focus
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
GB29956/66A
Inventor
Ivor Albert Ravenscroft
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to GB29956/66A priority Critical patent/GB1190566A/en
Priority to US650111A priority patent/US3530476A/en
Priority to DE19671591373 priority patent/DE1591373A1/en
Priority to FR113000A priority patent/FR1530201A/en
Publication of GB1190566A publication Critical patent/GB1190566A/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

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

Abstract

1,190,566. Aerials. POST OFFICE. 3 July, 1967 [4 July, 1966], No. 29956/66. Heading H4A. An aerial system comprises a concave main reflector 1 which is symmetrical about the axis of its generating curve, a primary feed device 3 which is offset from the said axis, and a subreflector 2 intersecting and the said axis which directs received radiation from the main reflector to the feed device. The generating curve of the main reflector 1 may be a parabola, and the sub. reflector 2 may be part of an hyperboloid of revolution having one focus f 1 coincident with the focus F of the said parabola, and the other focus # 2 coincident with the phase centre of the feed device 3, which may be an electromagnetic horn. The sub-reflector 2 is supported from the main reflector 1 by members 4, and the system is rotatable about an elevation axis carried by a platform 5, said platform being rotatable about an azimuth axis. The feed device 3 is coupled by a waveguide 6 to a receiver 7 inside a cabin 11 on the platform 5, said cabin also containing an elevation motor 9 and other equipment. The elevation axis of the system may pass through the receiver 7 and the axis of the hyperboloidal sub-reflector 2. The periphery of the mouth of the primary feed device may be arranged to lie in the surface of the main reflector. More than one primary feed device may be provided, said feed device phase centres being disposed on the circle of rotation about the axis of the main reflector by the said other focus of the sub-reflector. The description includes formulµ for determining the shape and the size of the sub-reflector.
GB29956/66A 1966-07-04 1966-07-04 Aerials Expired GB1190566A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB29956/66A GB1190566A (en) 1966-07-04 1966-07-04 Aerials
US650111A US3530476A (en) 1966-07-04 1967-06-29 Multiple reflector antenna with offset feed
DE19671591373 DE1591373A1 (en) 1966-07-04 1967-07-03 Antenna system
FR113000A FR1530201A (en) 1966-07-04 1967-07-04 Antennas improvements, in particular for satellite transmission systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29956/66A GB1190566A (en) 1966-07-04 1966-07-04 Aerials

Publications (1)

Publication Number Publication Date
GB1190566A true GB1190566A (en) 1970-05-06

Family

ID=10299938

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29956/66A Expired GB1190566A (en) 1966-07-04 1966-07-04 Aerials

Country Status (3)

Country Link
US (1) US3530476A (en)
DE (1) DE1591373A1 (en)
GB (1) GB1190566A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2101144B1 (en) * 1970-08-28 1973-11-23 Comp Generale Electricite
US3696432A (en) * 1971-01-15 1972-10-03 Motorola Inc Combined scan and track antennas
US4355316A (en) * 1980-09-22 1982-10-19 Ford Aerospace & Communications Corp. Offset J-hook reflector antenna
US4804971A (en) * 1986-04-16 1989-02-14 Chapparral Communications Guy system for parabolic reflecting antenna
US20080094298A1 (en) * 2006-10-23 2008-04-24 Harris Corporation Antenna with Shaped Asymmetric Main Reflector and Subreflector with Asymmetric Waveguide Feed

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1368820A (en) * 1963-06-14 1964-08-07 Csf High performance aerial
US3414904A (en) * 1966-05-16 1968-12-03 Hughes Aircraft Co Multiple reflector antenna

Also Published As

Publication number Publication date
DE1591373A1 (en) 1971-04-01
US3530476A (en) 1970-09-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees