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GB1326210A - Antenna using at least one reflector - Google Patents

Antenna using at least one reflector

Info

Publication number
GB1326210A
GB1326210A GB4399570A GB4399570A GB1326210A GB 1326210 A GB1326210 A GB 1326210A GB 4399570 A GB4399570 A GB 4399570A GB 4399570 A GB4399570 A GB 4399570A GB 1326210 A GB1326210 A GB 1326210A
Authority
GB
United Kingdom
Prior art keywords
reflector
absorbing material
wave absorbing
centre
feed 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
GB4399570A
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Publication of GB1326210A publication Critical patent/GB1326210A/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
    • H01Q19/02—Details
    • H01Q19/021—Means for reducing undesirable effects
    • H01Q19/025—Means for reducing undesirable effects for optimizing the matching of the primary feed, e.g. vertex plates

Landscapes

  • Aerials With Secondary Devices (AREA)

Abstract

1326210 Aerials KOKUSAI DENSHIN DENWA KK 15 Sept 1970 [16 Sept 1969] 43995/70 Heading H4A In an aerial in which a feed radiator illuminates a reflector, wave absorbing material is provided at the centre portion of the reflector, to prevent energy being directed back into the feed radiator. Mismatching is thereby avoided, and the aerial may be used over a wider frequency range. As shown in Fig. 7, a horn or other feed radiator 1 is directed towards a sub-reflector 8, which is in turn associated with a main reflector 2. In the centre of the subreflector 8 is cemented a disc 9 of wave absorbing material, such as rubber-ferrite or ferritecarbon-rubber, the exposed surface of which may be protected by a coating of glass-fibre or other material transparent to radio waves. In another embodiment, a main reflector is directly illuminated by a feed radiator, and has a disc of wave absorbing material at its centre (Fig. 6, not shown).
GB4399570A 1969-09-16 1970-09-15 Antenna using at least one reflector Expired GB1326210A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7271069 1969-09-16

Publications (1)

Publication Number Publication Date
GB1326210A true GB1326210A (en) 1973-08-08

Family

ID=13497166

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4399570A Expired GB1326210A (en) 1969-09-16 1970-09-15 Antenna using at least one reflector

Country Status (2)

Country Link
US (1) US3696436A (en)
GB (1) GB1326210A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174846A (en) * 1985-04-26 1986-11-12 British Telecomm Attenuation of microwave signals
GB2244600A (en) * 1990-03-27 1991-12-04 Ferguson Ltd Microwave antenna unit

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146869A (en) * 1976-10-28 1979-03-27 Bindicator Company Ultrasonic antenna assembly
FR2643720B1 (en) * 1989-02-27 1991-05-10 Alcatel Espace DEVICE FOR TESTING A RADIUS MICROWAVE POWER SOURCE
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
EP2117076B1 (en) * 2003-08-13 2016-06-01 Mitsubishi Denki Kabushiki Kaisha Reflector antenna device
JP4151593B2 (en) * 2004-03-10 2008-09-17 三菱電機株式会社 Double reflector antenna device
DE102005049242B4 (en) * 2005-10-14 2008-01-24 Vega Grieshaber Kg Parabolic antenna with conical lens for level radar
KR20180096280A (en) 2017-02-21 2018-08-29 삼성전자주식회사 Antenna apparatus and electronic device including the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH346258A (en) * 1957-02-21 1960-05-15 Standard Telephone & Radio Sa Electromagnetic wave projector
US3156917A (en) * 1960-02-22 1964-11-10 Marelli Lenkurt S P A Antenna reflector and feed with absorbers to reduce back radiation to feed
US3414904A (en) * 1966-05-16 1968-12-03 Hughes Aircraft Co Multiple reflector antenna

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174846A (en) * 1985-04-26 1986-11-12 British Telecomm Attenuation of microwave signals
US4786915A (en) * 1985-04-26 1988-11-22 British Telecommunications Public Limited Company Attenuation of microwave signals
GB2174846B (en) * 1985-04-26 1990-01-17 British Telecomm Attenuation of microwave signals
GB2244600A (en) * 1990-03-27 1991-12-04 Ferguson Ltd Microwave antenna unit

Also Published As

Publication number Publication date
US3696436A (en) 1972-10-03

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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