EP1596468A3 - Filters - Google Patents

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Publication number
EP1596468A3
EP1596468A3 EP05270013A EP05270013A EP1596468A3 EP 1596468 A3 EP1596468 A3 EP 1596468A3 EP 05270013 A EP05270013 A EP 05270013A EP 05270013 A EP05270013 A EP 05270013A EP 1596468 A3 EP1596468 A3 EP 1596468A3
Authority
EP
European Patent Office
Prior art keywords
apodising
filters
antenna
array
antenna array
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Withdrawn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
EP05270013A
Other languages
German (de)
French (fr)
Other versions
EP1596468A2 (en
Inventor
Ian Thomas c/o Selex Sensors and Airborne Flint
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.)
Leonardo UK Ltd
Original Assignee
BAE Systems PLC
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
Priority claimed from GB0410813A external-priority patent/GB0410813D0/en
Priority claimed from GB0505311A external-priority patent/GB0505311D0/en
Application filed by BAE Systems PLC filed Critical BAE Systems PLC
Publication of EP1596468A2 publication Critical patent/EP1596468A2/en
Publication of EP1596468A3 publication Critical patent/EP1596468A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H01Q3/26—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2676—Optically controlled phased array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/22—Antenna units of the array energised non-uniformly in amplitude or phase, e.g. tapered array or binomial array
    • 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
    • H01Q3/22—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 in accordance with variation of frequency of radiated wave

Abstract

The present invention relates to filters, and is more particularly concerned with apodising filters.
As shown, a spatial discriminator 100 comprises an antenna array 102 consisting a plurality of antenna elements 102a, 102b, 102c, 102d, 102e, 102f, 102g, 102h. The antenna array 102 is a phased antenna array and each antenna element 102a, 102b, 102c, 102d, 102e, 102f, 102g, 102h has a fixed phase difference relative to each other antenna element. The antenna array 102 is connected to an array 104 of apodising filters. Each antenna element 102a, 102b, 102c, 102d, 102e, 102f, 102g, 102h is connected to a respective apodising filter element 104a, 104b, 104c, 104d, 104e, 104f, 104g, 104h.
The apodising may be carried out in the microwave domain or, alternatively, in the optical domain if the signals from the antenna array are converted from electrical signals to optical signals. Advantageously, if the apodising is carried out in the optical domain, commercial off the shelf components can be used in the array 104 of apodising filters.
EP05270013A 2004-05-14 2005-05-09 Filters Withdrawn EP1596468A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0410813A GB0410813D0 (en) 2004-05-14 2004-05-14 Filters
GB0410813 2004-05-14
GB0505311 2005-03-16
GB0505311A GB0505311D0 (en) 2005-03-16 2005-03-16 Filters

Publications (2)

Publication Number Publication Date
EP1596468A2 EP1596468A2 (en) 2005-11-16
EP1596468A3 true EP1596468A3 (en) 2006-01-18

Family

ID=34941862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05270013A Withdrawn EP1596468A3 (en) 2004-05-14 2005-05-09 Filters

Country Status (1)

Country Link
EP (1) EP1596468A3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0526661D0 (en) 2005-11-23 2006-12-13 Bae Systems Plc Array Antenna

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571594A (en) * 1983-09-02 1986-02-18 The United States Of America As Represented By The Secretary Of The Air Force Directional antenna system having sidelobe suppression
US5751248A (en) * 1994-10-13 1998-05-12 The Boeing Company Phased array beam controller using integrated electro-optic circuits
US6172939B1 (en) * 1994-08-05 2001-01-09 Acuson Corporation Method and apparatus for transmit beamformer system
US6337660B1 (en) * 1993-09-17 2002-01-08 The United States Of America As Represented By The Secretary Of The Navy Fiber optic true time-delay array antenna feed system
FR2838199A1 (en) * 2002-04-03 2003-10-10 Commissariat Energie Atomique OPTICAL FILTERING DEVICE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571594A (en) * 1983-09-02 1986-02-18 The United States Of America As Represented By The Secretary Of The Air Force Directional antenna system having sidelobe suppression
US6337660B1 (en) * 1993-09-17 2002-01-08 The United States Of America As Represented By The Secretary Of The Navy Fiber optic true time-delay array antenna feed system
US6172939B1 (en) * 1994-08-05 2001-01-09 Acuson Corporation Method and apparatus for transmit beamformer system
US5751248A (en) * 1994-10-13 1998-05-12 The Boeing Company Phased array beam controller using integrated electro-optic circuits
FR2838199A1 (en) * 2002-04-03 2003-10-10 Commissariat Energie Atomique OPTICAL FILTERING DEVICE

Also Published As

Publication number Publication date
EP1596468A2 (en) 2005-11-16

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