EP0345768A3 - Antenna reconfigurable with respect to frequency, coverage and polarisation - Google Patents

Antenna reconfigurable with respect to frequency, coverage and polarisation Download PDF

Info

Publication number
EP0345768A3
EP0345768A3 EP19890110358 EP89110358A EP0345768A3 EP 0345768 A3 EP0345768 A3 EP 0345768A3 EP 19890110358 EP19890110358 EP 19890110358 EP 89110358 A EP89110358 A EP 89110358A EP 0345768 A3 EP0345768 A3 EP 0345768A3
Authority
EP
European Patent Office
Prior art keywords
frequency
antenna
polarisation
coverage
respect
Prior art date
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.)
Withdrawn
Application number
EP19890110358
Other languages
German (de)
French (fr)
Other versions
EP0345768A2 (en
Inventor
Giovanni Scialino
Beniamino Trombetta
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.)
Alenia Spazio SpA
Original Assignee
Selenia Spazio SpA
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 Selenia Spazio SpA filed Critical Selenia Spazio SpA
Publication of EP0345768A2 publication Critical patent/EP0345768A2/en
Publication of EP0345768A3 publication Critical patent/EP0345768A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/001—Crossed polarisation dual antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
    • H01Q3/245—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching in the focal plane of a focussing device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/45—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

Antenna to be reconfigured as to frequency, covering, polarization or function (table 1), mainly consisting in a system for the generation of a primary beam (B) and optionally of an optics (A) which alone can effect, in succession, missions which are different as to frequency bands and/or polarization and/or covering (i.e. as to form and/or width of the irradiated beam). Said antenna can effect an automatic following which may be present in one or in all of the missions.
The simultaneous working at two different frequencies may be carried out by the use of a sistem for the generation of the primary beam having a dichroic reflecting surface.
The invention may be used in civilian and military fields. It may further be used in movable and/or in stationary sistems and in space sistems.
EP19890110358 1988-06-09 1989-06-08 Antenna reconfigurable with respect to frequency, coverage and polarisation Withdrawn EP0345768A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4806788 1988-06-09
IT48067/88A IT1219615B (en) 1988-06-09 1988-06-09 FREQUENCY RECONFIGURABLE ANTENNA-COVER-POLARIZATION

Publications (2)

Publication Number Publication Date
EP0345768A2 EP0345768A2 (en) 1989-12-13
EP0345768A3 true EP0345768A3 (en) 1990-11-28

Family

ID=11264328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890110358 Withdrawn EP0345768A3 (en) 1988-06-09 1989-06-08 Antenna reconfigurable with respect to frequency, coverage and polarisation

Country Status (2)

Country Link
EP (1) EP0345768A3 (en)
IT (1) IT1219615B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6836258B2 (en) 2002-11-22 2004-12-28 Ems Technologies Canada, Ltd. Complementary dual antenna system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795004A (en) * 1973-02-26 1974-02-26 Us Army Cassegrain radar antenna with selectable acquisition and track modes
EP0100466A1 (en) * 1982-07-12 1984-02-15 Nec Corporation Dual-band antenna system of a beam waveguide type
US4535338A (en) * 1982-05-10 1985-08-13 At&T Bell Laboratories Multibeam antenna arrangement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795004A (en) * 1973-02-26 1974-02-26 Us Army Cassegrain radar antenna with selectable acquisition and track modes
US4535338A (en) * 1982-05-10 1985-08-13 At&T Bell Laboratories Multibeam antenna arrangement
EP0100466A1 (en) * 1982-07-12 1984-02-15 Nec Corporation Dual-band antenna system of a beam waveguide type

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Conference Proceedings 11th European Microwave Conference September 1981, Amsterdam/The Netherlands pages 567 - 572; Giefing;Leupelt: "A 12m Cassegrain Antenna with "Off-Set"Feed System for two Frequency Ranges and Monopulse Tracking with Bearing Error Correction" *

Also Published As

Publication number Publication date
EP0345768A2 (en) 1989-12-13
IT8848067A0 (en) 1988-06-09
IT1219615B (en) 1990-05-24

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