GB1017240A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1017240A – Improvements in or relating to radio frequency antenna systems
– Google Patents

GB1017240A – Improvements in or relating to radio frequency antenna systems
– Google Patents
Improvements in or relating to radio frequency antenna systems

Info

Publication number
GB1017240A

GB1017240A
GB36677/62A
GB3667762A
GB1017240A
GB 1017240 A
GB1017240 A
GB 1017240A
GB 36677/62 A
GB36677/62 A
GB 36677/62A
GB 3667762 A
GB3667762 A
GB 3667762A
GB 1017240 A
GB1017240 A
GB 1017240A
Authority
GB
United Kingdom
Prior art keywords
reflector
paraboloidal
primary
reflecting surface
section
Prior art date
1961-10-05
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
GB36677/62A
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.)

AT&T Corp

Original Assignee
Western Electric Co Inc
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.)
1961-10-05
Filing date
1962-09-26
Publication date
1966-01-19

1962-09-26
Application filed by Western Electric Co Inc
filed
Critical
Western Electric Co Inc

1966-01-19
Publication of GB1017240A
publication
Critical
patent/GB1017240A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

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

H01Q19/02—Details

H01Q19/021—Means for reducing undesirable effects

H01Q19/027—Means for reducing undesirable effects for compensating or reducing aperture blockage

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

Abstract

1,017,240. Aerials. WESTERN ELECTRIC CO. Inc. Sept. 26, 1962 [Oct. 5, 1961], No. 36677/62. Heading H4A. A Cassagrainian aerial system comprises a primary feed 10 filling an aperture 25 of diameter d in a primary concave paraboloidal reflector 20 facing a secondary convex reflecting surface 40 and spaced a distance x therefrom where x2/ 2 # (e.g. d = 14X, x = 30#) such that the secondary reflector 40 is in the near zone of the feed 10 thereby reducing spillover at the reflectors 20 and 40. As shown, the secondary reflecting surface 40 is paraboloidal, the primary feed 10 comprises a circular waveguide 14, conical horn section 18 and concave paraboloidal section 22 producing a substantially collimated beam having a plane wavefront, the diameters of the aperture 25 and secondary reflector 40 being substantially equal; alternatively, a plane wavefront may be produced by a small paraboloidal reflector fed in a conventional manner, or a diverging wavefront may be produced by a waveguide horn, or the paraboloidal section 22 of the feed 10 may be replaced by an ellipsoidal section to produce a converging wavefront, the contour of the secondary reflecting surface 40 being suitably modified. In order to reduce aperture blocking by the secondary reflector structure 30, radiation from the primary feed 10 incident on the central portion of the secondary reflecting surface 40 passes through an aperture therein and is directed on to a concave paraboloidal reflecting surface 42 of the secondary reflecting structure 30 via a conical horn 32, circular waveguide section 34 containing a dielectric phasing slab 38 and a reflecting cup 36 located at the focus 28 of the primary reflector 20. Suitable valves for the diameters of the primary and secondary reflectors 20 and 40 are 100# and 15# respectively. The aerial may be used for transmission to or reception from a communication satellite.

GB36677/62A
1961-10-05
1962-09-26
Improvements in or relating to radio frequency antenna systems

Expired

GB1017240A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

US143078A

US3231893A
(en)

1961-10-05
1961-10-05
Cassegrainian antenna with aperture blocking compensation

Publications (1)

Publication Number
Publication Date

GB1017240A
true

GB1017240A
(en)

1966-01-19

Family
ID=22502506
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB36677/62A
Expired

GB1017240A
(en)

1961-10-05
1962-09-26
Improvements in or relating to radio frequency antenna systems

Country Status (3)

Country
Link

US
(1)

US3231893A
(en)

DE
(1)

DE1441152A1
(en)

GB
(1)

GB1017240A
(en)

Cited By (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

GB2234858A
(en)

1988-09-02
1991-02-13
Thorn Emi Electronics Ltd
Cassegrain antenna

Families Citing this family (9)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3708795A
(en)

1970-02-10
1973-01-02
Hawker Siddeley Aviation Ltd
Cassegrain antenna mounted in aircraft nose cone

JPS5541045B2
(en)

1972-10-09
1980-10-22

US4031538A
(en)

1975-07-21
1977-06-21
Bell Telephone Laboratories, Incorporated
Antenna with echo cancelling elements

US4034378A
(en)

1975-07-21
1977-07-05
Bell Telephone Laboratories, Incorporated
Antenna with echo cancelling elements

JPS5779709A
(en)

1980-11-05
1982-05-19
Mitsubishi Electric Corp
Antenna device

JPS5779710A
(en)

1980-11-05
1982-05-19
Mitsubishi Electric Corp
Antenna device

JPS5779708A
(en)

1980-11-05
1982-05-19
Mitsubishi Electric Corp
Antenna device

JPS5779711A
(en)

1980-11-05
1982-05-19
Mitsubishi Electric Corp
Antenna device

US4689632A
(en)

1985-05-30
1987-08-25
Rca Corporation
Reflector antenna system having reduced blockage effects

Family Cites Families (7)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

DE861718C
(en)

1939-05-18
1953-01-05
Telefunken Gmbh

Directional beam arrangement

US2342721A
(en)

1940-01-20
1944-02-29
Boerner Rudolf
Parabolic reflector

FR971483A
(en)

1940-06-15
1951-01-17
Csf

Improvements to radio wave radiators

US3071770A
(en)

1953-07-20
1963-01-01
Wilkes Gilbert
Parabolic dish antenna with aperture blocking correction

US2824305A
(en)

1954-09-30
1958-02-18
Richard F Ohlemacher
Microwave antenna feed

US2972743A
(en)

1957-06-19
1961-02-21
Westinghouse Electric Corp
Combined infrared-radar antenna

US3133284A
(en)

1959-03-02
1964-05-12
Rca Corp
Paraboloidal antenna with compensating elements to reduce back radiation into feed

1961

1961-10-05
US
US143078A
patent/US3231893A/en
not_active
Expired – Lifetime

1962

1962-09-26
GB
GB36677/62A
patent/GB1017240A/en
not_active
Expired

1962-10-05
DE
DE19621441152
patent/DE1441152A1/en
active
Pending

Cited By (2)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

GB2234858A
(en)

1988-09-02
1991-02-13
Thorn Emi Electronics Ltd
Cassegrain antenna

FR2661562A1
(en)

1988-09-02
1991-10-31
Thorn Emi Electronics Ltd

CASSEGRAIN ANTENNA.

Also Published As

Publication number
Publication date

US3231893A
(en)

1966-01-25

DE1441152A1
(en)

1968-10-10

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