IT980311B - CASSEGRAIN TYPE ANTENNA WITH DECENTRALIZATION WITHOUT COVERAGE - Google Patents

CASSEGRAIN TYPE ANTENNA WITH DECENTRALIZATION WITHOUT COVERAGE

Info

Publication number
IT980311B
IT980311B IT49599/73A IT4959973A IT980311B IT 980311 B IT980311 B IT 980311B IT 49599/73 A IT49599/73 A IT 49599/73A IT 4959973 A IT4959973 A IT 4959973A IT 980311 B IT980311 B IT 980311B
Authority
IT
Italy
Prior art keywords
decentralization
coverage
type antenna
cassegrain type
cassegrain
Prior art date
Application number
IT49599/73A
Other languages
Italian (it)
Original Assignee
Thomson Csf
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 Thomson Csf filed Critical Thomson Csf
Application granted granted Critical
Publication of IT980311B publication Critical patent/IT980311B/en

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
    • H01Q19/02—Details
    • H01Q19/021—Means for reducing undesirable effects
    • H01Q19/026—Means for reducing undesirable effects for reducing the primary feed spill-over
    • 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
IT49599/73A 1972-04-21 1973-04-20 CASSEGRAIN TYPE ANTENNA WITH DECENTRALIZATION WITHOUT COVERAGE IT980311B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7214251A FR2180585B1 (en) 1972-04-21 1972-04-21

Publications (1)

Publication Number Publication Date
IT980311B true IT980311B (en) 1974-09-30

Family

ID=9097330

Family Applications (1)

Application Number Title Priority Date Filing Date
IT49599/73A IT980311B (en) 1972-04-21 1973-04-20 CASSEGRAIN TYPE ANTENNA WITH DECENTRALIZATION WITHOUT COVERAGE

Country Status (7)

Country Link
US (1) US3810187A (en)
JP (1) JPS5320342B2 (en)
CA (1) CA962342A (en)
DE (1) DE2319731C3 (en)
FR (1) FR2180585B1 (en)
GB (1) GB1359266A (en)
IT (1) IT980311B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2527545C3 (en) * 1975-06-20 1981-04-16 Naamloze Vennootschap Philips' Gloeilampenfabrieken, Eindhoven Injection molded horn antenna
DE2749443C3 (en) * 1977-11-04 1980-06-04 Siemens Ag, 1000 Berlin Und 8000 Muenchen Microwave broadband directional antenna in shell design
US4126864A (en) * 1978-01-23 1978-11-21 Hopkins B Ice shield for micro-wave antenna
US4626863A (en) * 1983-09-12 1986-12-02 Andrew Corporation Low side lobe Gregorian antenna
WO1985005692A1 (en) * 1984-05-31 1985-12-19 Hr Smith (Technical Developments) Limited Anechoid chambers
GB8510724D0 (en) * 1985-04-26 1985-06-05 British Telecomm Controlled attenuation of microwave signals
US4866457A (en) * 1988-11-08 1989-09-12 The United States Of America As Represented By The Secretary Of Commerce Covered inverted offset cassegrainian system
DE3915280C2 (en) * 1989-05-10 1993-11-04 Berthold Lab Prof R DEVICE FOR MICROWAVE TRANSMISSION OR ABSORPTION MEASUREMENT
GB9006752D0 (en) * 1990-03-27 1990-05-23 Ferguson Ltd Microwave antenna unit
DE19953271A1 (en) * 1999-11-06 2001-05-10 Airsys Navigation Systems Gmbh Transmitting antenna
JP2004077399A (en) * 2002-08-22 2004-03-11 Hitachi Ltd Milliwave radar
WO2019195700A1 (en) * 2018-04-05 2019-10-10 L3 Essco Incorporated A metal space frame radome

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1128952A (en) * 1955-03-17 1957-01-14 Materiel Telephonique Ultra-shortwave antenna
US3733609A (en) * 1971-07-02 1973-05-15 Radiation Inc Shrouded offset parabolic reflector antenna

Also Published As

Publication number Publication date
FR2180585B1 (en) 1974-12-20
FR2180585A1 (en) 1973-11-30
DE2319731C3 (en) 1981-01-08
US3810187A (en) 1974-05-07
DE2319731B2 (en) 1980-04-24
CA962342A (en) 1975-02-04
GB1359266A (en) 1974-07-10
JPS4922061A (en) 1974-02-27
JPS5320342B2 (en) 1978-06-26
DE2319731A1 (en) 1973-10-25

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