IT1032256B - D-BEAM ANTENNA VARIABLE OPENING FOR MILLIMETRIC WAVES - Google Patents

D-BEAM ANTENNA VARIABLE OPENING FOR MILLIMETRIC WAVES

Info

Publication number
IT1032256B
IT1032256B IT7548531A IT4853175A IT1032256B IT 1032256 B IT1032256 B IT 1032256B IT 7548531 A IT7548531 A IT 7548531A IT 4853175 A IT4853175 A IT 4853175A IT 1032256 B IT1032256 B IT 1032256B
Authority
IT
Italy
Prior art keywords
beam antenna
variable opening
antenna variable
millimetric waves
millimetric
Prior art date
Application number
IT7548531A
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 IT1032256B publication Critical patent/IT1032256B/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
    • H01Q19/10—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
    • H01Q19/195—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 wherein a reflecting surface acts also as a polarisation filter or a polarising device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/002—Antennas or antenna systems providing at least two radiating patterns providing at least two patterns of different beamwidth; Variable beamwidth antennas
IT7548531A 1974-03-12 1975-03-10 D-BEAM ANTENNA VARIABLE OPENING FOR MILLIMETRIC WAVES IT1032256B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7408257A FR2264407B1 (en) 1974-03-12 1974-03-12

Publications (1)

Publication Number Publication Date
IT1032256B true IT1032256B (en) 1979-05-30

Family

ID=9136147

Family Applications (1)

Application Number Title Priority Date Filing Date
IT7548531A IT1032256B (en) 1974-03-12 1975-03-10 D-BEAM ANTENNA VARIABLE OPENING FOR MILLIMETRIC WAVES

Country Status (7)

Country Link
BE (1) BE826544A (en)
DE (1) DE2510574A1 (en)
FR (1) FR2264407B1 (en)
GB (1) GB1488590A (en)
IT (1) IT1032256B (en)
NL (1) NL7502818A (en)
ZA (1) ZA751520B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2947910C2 (en) * 1979-11-28 1982-05-27 Siemens AG, 1000 Berlin und 8000 München Cassegrain antenna
GB2268834B (en) * 1980-12-04 1994-06-22 Racal Mesl Ltd Radar arrangements and methods of detecting different types of targets
FR2648278A1 (en) * 1989-06-13 1990-12-14 Europ Agence Spatiale Antenna with switchable beams
DE10344535A1 (en) * 2003-09-25 2005-04-28 Adc Automotive Dist Control reflector antenna
DE102007027975A1 (en) * 2007-06-19 2008-12-24 Robert Bosch Gmbh Sensor device for a motor vehicle
US11621494B2 (en) * 2020-09-21 2023-04-04 Nokia Shanghai Bell Co., Ltd. Feed for an antenna system comprising a sub-reflector and a main reflector

Also Published As

Publication number Publication date
ZA751520B (en) 1976-02-25
FR2264407A1 (en) 1975-10-10
AU7885275A (en) 1976-09-09
FR2264407B1 (en) 1978-02-10
NL7502818A (en) 1975-09-16
BE826544A (en) 1975-06-30
GB1488590A (en) 1977-10-12
DE2510574A1 (en) 1975-09-18

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