GB1331221A - Aerials - Google Patents

Aerials

Info

Publication number
GB1331221A
GB1331221A GB27468A GB1331221DA GB1331221A GB 1331221 A GB1331221 A GB 1331221A GB 27468 A GB27468 A GB 27468A GB 1331221D A GB1331221D A GB 1331221DA GB 1331221 A GB1331221 A GB 1331221A
Authority
GB
United Kingdom
Prior art keywords
feed
reflector
squirt
jan
dependent
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
GB27468A
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.)
Allard Way Holdings Ltd
Original Assignee
Elliott Brothers London 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 Elliott Brothers London Ltd filed Critical Elliott Brothers London Ltd
Publication of GB1331221A publication Critical patent/GB1331221A/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
    • H01Q19/192—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 with dual offset reflectors

Abstract

1331221 Aerials ELLIOTT BROS (LONDON) Ltd 15 Jan 1969 [2 Jan 1968] 274/68 Heading H4A In an antenna system, the paraboloid concave collimating reflector, 10, receives energy from the feed, 14, after reflection from the hyperboloid reflector, 16. The feed, 14, is located on the axis, 17, of the hyperboloid, the letter having one of its focii coinciding with the feed and its other focus coinciding with the focus, 18 of the paraboloid reflector. Field distortion is eliminated so as to reduce "bore-sight jitter" and "frequency sensitive squirt". The former causes the beam axis to be dependent upon the polarization of the received energy when the aerial feeder system is designed to receive plane polarized energy while the "frequency sensitive squirt" causes the beam axis to be dependent upon the frequency of operation when aerial is designed to receive circular polarization.
GB27468A 1968-01-02 1969-01-15 Aerials Expired GB1331221A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27468 1968-01-02

Publications (1)

Publication Number Publication Date
GB1331221A true GB1331221A (en) 1973-09-26

Family

ID=9701474

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27468A Expired GB1331221A (en) 1968-01-02 1969-01-15 Aerials

Country Status (5)

Country Link
US (1) US3792480A (en)
DE (1) DE1817585A1 (en)
FR (1) FR1605256A (en)
GB (1) GB1331221A (en)
NL (1) NL6818798A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2503594A1 (en) * 1974-01-31 1975-08-07 Western Electric Co CASSEGRAIN ANTENNA
EP0097932A1 (en) * 1982-06-28 1984-01-11 Siemens Aktiengesellschaft Directional radio microwave antenna

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995275A (en) * 1973-07-12 1976-11-30 Mitsubishi Denki Kabushiki Kaisha Reflector antenna having main and subreflector of diverse curvature
US3949404A (en) * 1974-12-19 1976-04-06 Nasa Highly efficient antenna system using a corrugated horn and scanning hyperbolic reflector
US3953858A (en) * 1975-05-30 1976-04-27 Bell Telephone Laboratories, Incorporated Multiple beam microwave apparatus
NL7509882A (en) * 1975-08-20 1977-02-22 Vaclav Josef Vokurka ANTENNA.
NL7608162A (en) * 1976-07-22 1978-01-24 Vaclav Josef Vokurka ANTENNA ESPECIALLY FOR MEASUREMENT PURPOSES.
US4145695A (en) * 1977-03-01 1979-03-20 Bell Telephone Laboratories, Incorporated Launcher reflectors for correcting for astigmatism in off-axis fed reflector antennas
US4272769A (en) * 1979-08-27 1981-06-09 Young Frederick A Microwave antenna with parabolic main reflector
US4343004A (en) * 1980-11-24 1982-08-03 Bell Telephone Laboratories, Incorporated Broadband astigmatic feed arrangement for an antenna
US4339757A (en) * 1980-11-24 1982-07-13 Bell Telephone Laboratories, Incorporated Broadband astigmatic feed arrangement for an antenna
US4407001A (en) * 1981-10-02 1983-09-27 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Focal axis resolver for offset reflector antennas
DE3209513A1 (en) * 1982-03-16 1984-02-09 ANT Nachrichtentechnik GmbH, 7150 Backnang Eccentric Parabolic Antenna with Low Cross Polarization
US4535338A (en) * 1982-05-10 1985-08-13 At&T Bell Laboratories Multibeam antenna arrangement
US4491848A (en) * 1982-08-30 1985-01-01 At&T Bell Laboratories Substantially frequency-independent aberration correcting antenna arrangement
US4482898A (en) * 1982-10-12 1984-11-13 At&T Bell Laboratories Antenna feed arrangement for correcting for astigmatism
JPS60178709A (en) * 1984-02-24 1985-09-12 Nippon Telegr & Teleph Corp <Ntt> Offset multi-reflector antenna
US6417602B1 (en) 1998-03-03 2002-07-09 Sensotech Ltd. Ultrasonic transducer
US6225961B1 (en) 1999-07-27 2001-05-01 Prc Inc. Beam waveguide antenna with independently steerable antenna beams and method of compensating for planetary aberration in antenna beam tracking of spacecraft

Family Cites Families (1)

* 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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2503594A1 (en) * 1974-01-31 1975-08-07 Western Electric Co CASSEGRAIN ANTENNA
EP0097932A1 (en) * 1982-06-28 1984-01-11 Siemens Aktiengesellschaft Directional radio microwave antenna

Also Published As

Publication number Publication date
DE1817585A1 (en) 1974-08-01
US3792480A (en) 1974-02-12
FR1605256A (en) 1973-11-02
NL6818798A (en) 1973-08-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years