IT1057979B - Antenni a riduzione selettiva di guardagno - Google Patents

Antenni a riduzione selettiva di guardagno

Info

Publication number
IT1057979B
IT1057979B IT48545/76A IT4854576A IT1057979B IT 1057979 B IT1057979 B IT 1057979B IT 48545/76 A IT48545/76 A IT 48545/76A IT 4854576 A IT4854576 A IT 4854576A IT 1057979 B IT1057979 B IT 1057979B
Authority
IT
Italy
Prior art keywords
guardagno
antennas
selective reduction
selective
reduction
Prior art date
Application number
IT48545/76A
Other languages
English (en)
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 IT1057979B publication Critical patent/IT1057979B/it

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
IT48545/76A 1975-03-14 1976-03-12 Antenni a riduzione selettiva di guardagno IT1057979B (it)

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
IT1057979B true IT1057979B (it) 1982-03-30

Family

ID=9152607

Family Applications (1)

Application Number Title Priority Date Filing Date
IT48545/76A IT1057979B (it) 1975-03-14 1976-03-12 Antenni a riduzione selettiva di guardagno

Country Status (10)

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

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
EP0284897B1 (de) * 1987-03-19 1992-06-17 Siemens Aktiengesellschaft 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 (it) * 1973-09-14 1980-04-07

Also Published As

Publication number Publication date
BE839482A (fr) 1976-07-01
NL177367C (nl) 1985-09-02
NL177367B (nl) 1985-04-01
FR2304192A1 (fr) 1976-10-08
FR2304192B1 (it) 1982-04-30
DE2610506A1 (de) 1976-09-30
DE2610506C2 (de) 1982-03-04
JPS51139235A (en) 1976-12-01
JPS6035844B2 (ja) 1985-08-16
CH600605A5 (it) 1978-06-30
NL7602556A (nl) 1976-09-16
US4096483A (en) 1978-06-20
GB1513521A (en) 1978-06-07
LU74538A1 (it) 1976-09-01

Similar Documents

Publication Publication Date Title
SE416432B (sv) Antennsystem
DK291077A (da) Multirundstraleantenne
AR214181A1 (es) Hemodializador
FR2300431A1 (fr) Connecteu
DK60576A (da) Elementantenne
RO73090A (ro) Racord special
FR2303702A1 (fr) Structure flottante
IT1057979B (it) Antenni a riduzione selettiva di guardagno
FR2300029A1 (fr) Pro
SE413451B (sv) Radiomottagare
FR2297851A1 (fr) Pro
DK142377A (da) Flerstraleantenne
DK396476A (da) Tverbunder orgotein
FR2299739A1 (fr) Antenne du type helicoidal
JPS51101887A (ja) Denkikonekuta
FR2321781A1 (fr) Antennes
FR2313453A1 (fr) Pro
FR2302559A1 (fr) Pro
SE7612530L (sv) Flerverda fenolsamestrar
JPS5184487A (ja) Tasokenmarin
FR2302288A1 (fr) Pro
AT333462B (de) Karniese
FR2331163A1 (fr) Antenne
JPS51109752A (ja) Antena
JPS5183450A (ja) Goosutojokyoantena