GB2511076A9 - Improvements in and relating to radar - Google Patents

Improvements in and relating to radar

Info

Publication number
GB2511076A9
GB2511076A9 GB1303143.0A GB201303143A GB2511076A9 GB 2511076 A9 GB2511076 A9 GB 2511076A9 GB 201303143 A GB201303143 A GB 201303143A GB 2511076 A9 GB2511076 A9 GB 2511076A9
Authority
GB
United Kingdom
Prior art keywords
antenna
arrays
sub
signal
elements
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Withdrawn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
GB1303143.0A
Other versions
GB2511076A (en
GB201303143D0 (en
Inventor
Michael Andrew Scott
Malcolm John Quinney
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.)
BAE Systems PLC
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
Application filed by BAE Systems PLC filed Critical BAE Systems PLC
Priority to GB1303143.0A priority Critical patent/GB2511076A/en
Publication of GB201303143D0 publication Critical patent/GB201303143D0/en
Priority to EP14709361.1A priority patent/EP2959543A1/en
Priority to PCT/GB2014/050547 priority patent/WO2014128503A1/en
Priority to US14/769,706 priority patent/US20150380832A1/en
Priority to AU2014220442A priority patent/AU2014220442A1/en
Priority to BR112015020210A priority patent/BR112015020210A2/en
Publication of GB2511076A publication Critical patent/GB2511076A/en
Priority to CL2015002344A priority patent/CL2015002344A1/en
Publication of GB2511076A9 publication Critical patent/GB2511076A9/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Withdrawn legal-status Critical Current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
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H01Q3/2611—Means for null steering; Adaptive interference nulling
    • H01Q3/2617—Array of identical elements

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

An antenna, or a method of forming an antenna, comprises: two or more substantially identical antenna sub-arrays 3A, 3B, each with a plurality of separate antenna radiating elements 6A, 6B connected to a common radio frequency RF signal input/output port 4A, 4B. The separate antenna elements 6A, 6B are connected to the RF signal input/output port 4A, 4B via respective RF signal power dividers 8A, 8B. A variance in values of the power splitting ratio, and/or of the input RF signal reflectivity, and/or of the phase balance of corresponding signal power dividers of the two or more antenna sub-arrays 3A, 3B is sufficient to provide a cancellation ratio exceeding 40dB. Alternatively, the separate antenna elements 6A, 6B are connected to the RF signal input/output port 4A, 4B via respective transmission paths 7A, 7B with a variance in values of the transmission path lengths of corresponding signal transmission paths of the two or more antenna sub-arrays which is sufficient to provide a cancellation ratio exceeding 40dB. The RF connections may be provided by suspended channelized air stripline transmission lines. The sub-arrays 3A, 3B may be arranged in parallel planar arrays with elements which are mutually in register.
GB1303143.0A 2013-02-22 2013-02-22 Improvements in and relating to radar Withdrawn GB2511076A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB1303143.0A GB2511076A (en) 2013-02-22 2013-02-22 Improvements in and relating to radar
EP14709361.1A EP2959543A1 (en) 2013-02-22 2014-02-24 Improvements in and relating to radar
PCT/GB2014/050547 WO2014128503A1 (en) 2013-02-22 2014-02-24 Improvements in and relating to radar
US14/769,706 US20150380832A1 (en) 2013-02-22 2014-02-24 Improvements in and relating to radar
AU2014220442A AU2014220442A1 (en) 2013-02-22 2014-02-24 Improvements in and relating to radar
BR112015020210A BR112015020210A2 (en) 2013-02-22 2014-02-24 antenna, and method for making an antenna
CL2015002344A CL2015002344A1 (en) 2013-02-22 2015-08-21 Improvements in and related to radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1303143.0A GB2511076A (en) 2013-02-22 2013-02-22 Improvements in and relating to radar

Publications (3)

Publication Number Publication Date
GB201303143D0 GB201303143D0 (en) 2013-04-10
GB2511076A GB2511076A (en) 2014-08-27
GB2511076A9 true GB2511076A9 (en) 2016-03-30

Family

ID=48091921

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1303143.0A Withdrawn GB2511076A (en) 2013-02-22 2013-02-22 Improvements in and relating to radar

Country Status (1)

Country Link
GB (1) GB2511076A (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9402942D0 (en) * 1994-02-16 1994-04-06 Northern Telecom Ltd Base station antenna arrangement
JP3807961B2 (en) * 2001-08-01 2006-08-09 インターナショナル・ビジネス・マシーンズ・コーポレーション Session management method, session management system and program
US7339979B1 (en) * 2003-02-11 2008-03-04 Calamp Corp. Adaptive beamforming methods and systems that enhance performance and reduce computations
US7627052B2 (en) * 2004-09-23 2009-12-01 Interdigital Technology Corporation Pattern diversity to support a MIMO receiver and associated methods
EP3567736A1 (en) * 2011-08-19 2019-11-13 Quintel Cayman Limited Method and apparatus for providing elevation plane spatial beamforming

Also Published As

Publication number Publication date
GB2511076A (en) 2014-08-27
GB201303143D0 (en) 2013-04-10

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)