LU74538A1 - - Google Patents

Info

Publication number
LU74538A1
LU74538A1 LU74538A LU74538A LU74538A1 LU 74538 A1 LU74538 A1 LU 74538A1 LU 74538 A LU74538 A LU 74538A LU 74538 A LU74538 A LU 74538A LU 74538 A1 LU74538 A1 LU 74538A1
Authority
LU
Luxembourg
Application number
LU74538A
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 filed Critical
Publication of LU74538A1 publication Critical patent/LU74538A1/xx

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
    • H01Q19/10—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
LU74538A 1975-03-14 1976-03-12 LU74538A1 (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7508072A FR2304192A1 (fr) 1975-03-14 1975-03-14 Antenne a reduction selective de gain

Publications (1)

Publication Number Publication Date
LU74538A1 true LU74538A1 (ja) 1976-09-01

Family

ID=9152607

Family Applications (1)

Application Number Title Priority Date Filing Date
LU74538A LU74538A1 (ja) 1975-03-14 1976-03-12

Country Status (10)

Country Link
US (1) US4096483A (ja)
JP (1) JPS6035844B2 (ja)
BE (1) BE839482A (ja)
CH (1) CH600605A5 (ja)
DE (1) DE2610506C2 (ja)
FR (1) FR2304192A1 (ja)
GB (1) GB1513521A (ja)
IT (1) IT1057979B (ja)
LU (1) LU74538A1 (ja)
NL (1) NL177367C (ja)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385233A1 (fr) * 1977-03-25 1978-10-20 Thomson Csf Structure d'antenne a reflecteurs et notamment a reflecteurs excentres, et equipements de detection electromagnetique et de telecommunications spatiales comportant une telle structure
US4626863A (en) * 1983-09-12 1986-12-02 Andrew Corporation Low side lobe Gregorian antenna
DE3402659A1 (de) * 1984-01-26 1985-08-01 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Reflektorantenne fuer den betrieb in mehreren frequenzbereichen
FR2568062B1 (fr) * 1984-07-17 1986-11-07 Thomson Alcatel Espace Antenne bifrequence a meme couverture de zone a polarisation croisee pour satellites de telecommunications
GB8510724D0 (en) * 1985-04-26 1985-06-05 British Telecomm Controlled attenuation of microwave signals
US5003321A (en) * 1985-09-09 1991-03-26 Sts Enterprises, Inc. Dual frequency feed
ATE77514T1 (de) * 1987-03-19 1992-07-15 Siemens Ag Zweireflektor-microwellen-richtantenne.
US4901086A (en) * 1987-10-02 1990-02-13 Raytheon Company Lens/polarizer radome
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
DE19630784C1 (de) * 1996-07-31 1998-01-02 Daimler Benz Aerospace Ag Reflektorantenne
US6211834B1 (en) 1998-09-30 2001-04-03 Harris Corporation Multiband ring focus antenna employing shaped-geometry main reflector and diverse-geometry shaped subreflector-feeds
US6169524B1 (en) * 1999-01-15 2001-01-02 Trw Inc. Multi-pattern antenna having frequency selective or polarization sensitive zones
US6285332B1 (en) * 1999-09-10 2001-09-04 Trw Inc. Frequency selective reflector
EP1137102A3 (en) * 2000-03-20 2004-01-07 The Boeing Company Frequency variable aperture reflector
US6608607B2 (en) 2001-11-27 2003-08-19 Northrop Grumman Corporation High performance multi-band frequency selective reflector with equal beam coverage
US6803883B2 (en) * 2003-02-13 2004-10-12 Spectrasite Communications, Inc. Radio frequency electromagnetic emissions shield
ES2847799T3 (es) * 2007-05-14 2021-08-03 Saab Ab Dispositivo de antena

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460869A (en) * 1946-03-14 1949-02-08 Rca Corp Antenna
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
US3101473A (en) * 1960-04-14 1963-08-20 Mcdonnell Aircraft Corp Parabolic reflector with rim of absorbing material to attenuate side lobes
US3938152A (en) * 1963-06-03 1976-02-10 Mcdonnell Douglas Corporation Magnetic absorbers
US3430245A (en) * 1965-05-19 1969-02-25 Whittaker Corp Spherical reflector with lens to convert to parabolic surface
US3314071A (en) * 1965-07-12 1967-04-11 Gen Dynamics Corp Device for control of antenna illumination tapers comprising a tapered surface of rf absorption material
GB1234778A (en) * 1967-08-22 1971-06-09 E M I Ltd Formerly Known As El Improvements in or relating to surfaces for reflecting microwave energy
US3514781A (en) * 1967-12-05 1970-05-26 Us Army Broadband,high gain antenna with relatively constant beamwidth
JPS5513162B2 (ja) * 1973-09-14 1980-04-07

Also Published As

Publication number Publication date
FR2304192B1 (ja) 1982-04-30
CH600605A5 (ja) 1978-06-30
JPS6035844B2 (ja) 1985-08-16
DE2610506A1 (de) 1976-09-30
US4096483A (en) 1978-06-20
DE2610506C2 (de) 1982-03-04
GB1513521A (en) 1978-06-07
NL177367C (nl) 1985-09-02
FR2304192A1 (fr) 1976-10-08
IT1057979B (it) 1982-03-30
NL7602556A (nl) 1976-09-16
NL177367B (nl) 1985-04-01
BE839482A (fr) 1976-07-01
JPS51139235A (en) 1976-12-01

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