GB2005922A - Improvements in or relating to radio antennas - Google Patents

Improvements in or relating to radio antennas

Info

Publication number
GB2005922A
GB2005922A GB7836594A GB7836594A GB2005922A GB 2005922 A GB2005922 A GB 2005922A GB 7836594 A GB7836594 A GB 7836594A GB 7836594 A GB7836594 A GB 7836594A GB 2005922 A GB2005922 A GB 2005922A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
plate
outer edge
annular slot
mode
quadrature
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.)
Granted
Application number
GB7836594A
Other versions
GB2005922B (en )
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.)
United Kingdom Secretary of State for Defence
Original Assignee
United Kingdom Secretary of State for Defence
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

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10Resonant slot antennas
    • H01Q13/18Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/04Multimode antennas

Abstract

A radio antenna comprises conducting plates arranged to form a pair of coaxial annular slot aerials dimensioned to resonate respectively in a radial mode and a circumferential mode, both at the same frequency. The antenna may comprise a first flat plate (4) having a circular outer edge and supported adjacent to a ground conductor (1) to define a first annular slot between the outer edge of the first plate and the ground conductor for the radial mode, and a second flat plate (7) having a circular outer edge of smaller diameter than the outer edge of the first plate and supported adjacent to the first plate to define a second annular slot between the outer edge of the second plate and the first plate for the circumferential mode. There may be provided in-phase connection means connected to a plurality of circumferentially spaced connection points (9, 10) on the first plate (4), and in-quadrature connection means connected to quadrature connection points (13, 14) on the second plate (7). <IMAGE>
GB7836594A 1977-10-01 1978-09-13 Radio antennae Expired GB2005922B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB4085577 1977-10-01
GB7836594A GB2005922B (en) 1977-10-01 1978-09-13 Radio antennae

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7836594A GB2005922B (en) 1977-10-01 1978-09-13 Radio antennae

Publications (2)

Publication Number Publication Date
GB2005922A true true GB2005922A (en) 1979-04-25
GB2005922B GB2005922B (en) 1982-05-19

Family

ID=26264521

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7836594A Expired GB2005922B (en) 1977-10-01 1978-09-13 Radio antennae

Country Status (1)

Country Link
GB (1) GB2005922B (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497001A1 (en) * 1980-12-19 1982-06-25 United Kingdom Government radio antenna, in particular for communications between aircraft and satellites
US4538153A (en) * 1981-09-07 1985-08-27 Nippon Telegraph & Telephone Public Corp. Directivity diversity communication system with microstrip antenna
US4827271A (en) * 1986-11-24 1989-05-02 Mcdonnell Douglas Corporation Dual frequency microstrip patch antenna with improved feed and increased bandwidth
US4947178A (en) * 1988-05-02 1990-08-07 Lotfollah Shafai Scanning antenna
US5003318A (en) * 1986-11-24 1991-03-26 Mcdonnell Douglas Corporation Dual frequency microstrip patch antenna with capacitively coupled feed pins
US5099249A (en) * 1987-10-13 1992-03-24 Seavey Engineering Associates, Inc. Microstrip antenna for vehicular satellite communications
EP0632523A1 (en) * 1993-07-01 1995-01-04 Commonwealth Scientific And Industrial Research Organisation A planar antenna
EP0684659A1 (en) * 1994-05-26 1995-11-29 Schlumberger Industries Limited Radio antennae
WO1996016452A1 (en) * 1994-11-23 1996-05-30 California Amplifier Antenna/downconverter having low cross polarization and broad bandwidth
US5568157A (en) * 1993-01-25 1996-10-22 Securicor Datatrak Limited Dual purpose, low profile antenna
US6181277B1 (en) * 1987-04-08 2001-01-30 Raytheon Company Microstrip antenna
WO2001076010A1 (en) * 2000-04-04 2001-10-11 Huber+Suhner Ag Broad band communications antenna
US20130278475A1 (en) * 2012-04-19 2013-10-24 Eads Deutschland Gmbh Annular Slot Antenna

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497001A1 (en) * 1980-12-19 1982-06-25 United Kingdom Government radio antenna, in particular for communications between aircraft and satellites
US4538153A (en) * 1981-09-07 1985-08-27 Nippon Telegraph & Telephone Public Corp. Directivity diversity communication system with microstrip antenna
US4827271A (en) * 1986-11-24 1989-05-02 Mcdonnell Douglas Corporation Dual frequency microstrip patch antenna with improved feed and increased bandwidth
US5003318A (en) * 1986-11-24 1991-03-26 Mcdonnell Douglas Corporation Dual frequency microstrip patch antenna with capacitively coupled feed pins
US6181277B1 (en) * 1987-04-08 2001-01-30 Raytheon Company Microstrip antenna
US5099249A (en) * 1987-10-13 1992-03-24 Seavey Engineering Associates, Inc. Microstrip antenna for vehicular satellite communications
US4947178A (en) * 1988-05-02 1990-08-07 Lotfollah Shafai Scanning antenna
US5568157A (en) * 1993-01-25 1996-10-22 Securicor Datatrak Limited Dual purpose, low profile antenna
EP0632523A1 (en) * 1993-07-01 1995-01-04 Commonwealth Scientific And Industrial Research Organisation A planar antenna
US5714961A (en) * 1993-07-01 1998-02-03 Commonwealth Scientific And Industrial Research Organisation Planar antenna directional in azimuth and/or elevation
GB2291272A (en) * 1994-05-26 1996-01-17 Schlumberger Ind Ltd Radio antennae
EP0684659A1 (en) * 1994-05-26 1995-11-29 Schlumberger Industries Limited Radio antennae
GB2291272B (en) * 1994-05-26 1998-11-11 Schlumberger Ind Ltd Radio antennae
WO1996016452A1 (en) * 1994-11-23 1996-05-30 California Amplifier Antenna/downconverter having low cross polarization and broad bandwidth
US5793258A (en) * 1994-11-23 1998-08-11 California Amplifier Low cross polarization and broad bandwidth
WO2001076010A1 (en) * 2000-04-04 2001-10-11 Huber+Suhner Ag Broad band communications antenna
US6756942B2 (en) 2000-04-04 2004-06-29 Huber+Suhner Ag Broadband communications antenna
US20130278475A1 (en) * 2012-04-19 2013-10-24 Eads Deutschland Gmbh Annular Slot Antenna
US9692137B2 (en) * 2012-04-19 2017-06-27 Eads Deutschland Gmbh Annular slot antenna

Also Published As

Publication number Publication date Type
GB2005922B (en) 1982-05-19 grant

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee