GB2227369B - A circular polarization antenna system - Google Patents

A circular polarization antenna system

Info

Publication number
GB2227369B
GB2227369B GB8918771A GB8918771A GB2227369B GB 2227369 B GB2227369 B GB 2227369B GB 8918771 A GB8918771 A GB 8918771A GB 8918771 A GB8918771 A GB 8918771A GB 2227369 B GB2227369 B GB 2227369B
Authority
GB
United Kingdom
Prior art keywords
antenna system
circular polarization
polarization antenna
circular
polarization
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.)
Expired - Fee Related
Application number
GB8918771A
Other versions
GB2227369A (en
GB8918771D0 (en
Inventor
Hisamatsu Nakano
Ken Ishino
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.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Publication of GB8918771D0 publication Critical patent/GB8918771D0/en
Publication of GB2227369A publication Critical patent/GB2227369A/en
Application granted granted Critical
Publication of GB2227369B publication Critical patent/GB2227369B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00Antenna arrays or systems
    • H01Q21/06Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/20Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02Non-resonant antennas, e.g. travelling-wave antenna
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00Antenna arrays or systems
    • H01Q21/0006Particular feeding systems
    • H01Q21/0012Radial guide fed arrays
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00Antenna arrays or systems
    • H01Q21/06Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061Two dimensional planar arrays
    • H01Q21/067Two dimensional planar arrays using endfire radiating aerial units transverse to the plane of the array
GB8918771A 1989-01-18 1989-08-17 A circular polarization antenna system Expired - Fee Related GB2227369B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP783089A JPH02189008A (en) 1989-01-18 1989-01-18 Circularly polarized wave antenna system

Publications (3)

Publication Number Publication Date
GB8918771D0 GB8918771D0 (en) 1989-09-27
GB2227369A GB2227369A (en) 1990-07-25
GB2227369B true GB2227369B (en) 1993-05-05

Family

ID=11676514

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8918771A Expired - Fee Related GB2227369B (en) 1989-01-18 1989-08-17 A circular polarization antenna system

Country Status (5)

Country Link
JP (1) JPH02189008A (en)
CA (1) CA1331055C (en)
DE (1) DE3927141C2 (en)
FR (1) FR2641904B1 (en)
GB (1) GB2227369B (en)

Families Citing this family (128)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0438113U (en) * 1990-07-27 1992-03-31
JP2650778B2 (en) * 1990-10-18 1997-09-03 八木アンテナ株式会社 Planar antenna
JP2502417B2 (en) * 1991-06-05 1996-05-29 八木アンテナ株式会社 Planar antenna
JP2506514B2 (en) * 1991-06-06 1996-06-12 八木アンテナ株式会社 Planar antenna
ES2088167T3 (en) * 1992-01-23 1996-08-01 Yokowo Seisakusho Kk FLAT ANTENNA FOR CIRCULARLY POLARIZED WAVES.
KR0147035B1 (en) * 1993-07-31 1998-08-17 배순훈 Improved helical wire array planar antenna
KR950004634A (en) * 1993-07-31 1995-02-18 배순훈 Improved Helical Wire Array Plane Antenna
FR2810163A1 (en) * 2000-06-09 2001-12-14 Thomson Multimedia Sa IMPROVEMENT TO ELECTROMAGNETIC WAVE EMISSION / RECEPTION SOURCE ANTENNAS
US6768475B2 (en) * 2001-02-27 2004-07-27 Mitsubishi Denki Kabushiki Kaisha Antenna
NO20030347D0 (en) * 2003-01-23 2003-01-23 Radionor Comm As Antenna element and group antenna
DE10304420B3 (en) * 2003-02-04 2004-10-07 Kastriot Merlaku Electromagnetic coil/spiral receiver antenna consists of CD or DVD disk with spiral groove(s) in metal coating so deep that coating is electrically separated, feed point on one end of coil in disk
US7262729B1 (en) * 2006-06-19 2007-08-28 General Electric Company Radio detection and ranging intrusion detection system
CN102882012A (en) * 2012-09-14 2013-01-16 无锡创元电子科技有限公司 Wall-hung or horizontally-laid flat satellite television antenna
CN102868028B (en) * 2012-09-19 2014-08-20 无锡创元电子科技有限公司 Mechanical type phase control scanning array antennae and wave beam pointing control method thereof
US9525524B2 (en) 2013-05-31 2016-12-20 At&T Intellectual Property I, L.P. Remote distributed antenna system
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US8897697B1 (en) 2013-11-06 2014-11-25 At&T Intellectual Property I, Lp Millimeter-wave surface-wave communications
FR3013905B1 (en) * 2013-11-28 2017-05-19 Thales Sa COMPACT ANTENNA STRUCTURE FOR SATELLITE TELECOMMUNICATIONS
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US10135145B2 (en) 2016-12-06 2018-11-20 At&T Intellectual Property I, L.P. Apparatus and methods for generating an electromagnetic wave along a transmission medium
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1234751A (en) * 1966-11-30 1971-06-09 Gen Electric Co Ltd Improvements in or relating to aerials
EP0020196A1 (en) * 1979-05-08 1980-12-10 Thomson-Csf Ringplate-type microwave array antenna with feeding system and its application in radars
EP0132945A1 (en) * 1983-07-01 1985-02-13 EMI Limited Antenna

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1287656B (en) * 1969-01-23
US3852761A (en) * 1973-04-23 1974-12-03 Rca Corp Lens fed antenna array system
FR2242784B1 (en) * 1973-08-31 1977-05-13 Thomson Csf
JPS5787603A (en) * 1980-11-21 1982-06-01 Naohisa Goto Circular polarized wave plane array antenna
US4647940A (en) * 1982-09-27 1987-03-03 Rogers Corporation Parallel plate waveguide antenna
JPS60199201A (en) * 1984-03-24 1985-10-08 Arimura Giken Kk Circular waveguide line
JPS62194708A (en) * 1986-02-20 1987-08-27 Sharp Corp Feeding structure for helical antenna

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1234751A (en) * 1966-11-30 1971-06-09 Gen Electric Co Ltd Improvements in or relating to aerials
EP0020196A1 (en) * 1979-05-08 1980-12-10 Thomson-Csf Ringplate-type microwave array antenna with feeding system and its application in radars
EP0132945A1 (en) * 1983-07-01 1985-02-13 EMI Limited Antenna

Also Published As

Publication number Publication date
CA1331055C (en) 1994-07-26
GB2227369A (en) 1990-07-25
FR2641904B1 (en) 1992-11-20
DE3927141A1 (en) 1990-07-19
JPH02189008A (en) 1990-07-25
FR2641904A1 (en) 1990-07-20
GB8918771D0 (en) 1989-09-27
DE3927141C2 (en) 1993-12-23

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Effective date: 20080817