CA2165569A1 - Antenna having improved directionality - Google Patents

Antenna having improved directionality

Info

Publication number
CA2165569A1
CA2165569A1 CA002165569A CA2165569A CA2165569A1 CA 2165569 A1 CA2165569 A1 CA 2165569A1 CA 002165569 A CA002165569 A CA 002165569A CA 2165569 A CA2165569 A CA 2165569A CA 2165569 A1 CA2165569 A1 CA 2165569A1
Authority
CA
Canada
Prior art keywords
layers
axis
antenna
rear end
electromagnetic radiation
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
CA002165569A
Other languages
French (fr)
Other versions
CA2165569C (en
Inventor
Graham John Parfitt
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.)
Northrop Grumman Systems Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2165569A1 publication Critical patent/CA2165569A1/en
Application granted granted Critical
Publication of CA2165569C publication Critical patent/CA2165569C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02—Waveguide horns
    • H01Q13/0233—Horns fed by a slotted waveguide array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens

Abstract

An antenna for transmitting or receiving electromagnetic radiation along an axis comprises at least three layers 20a, 20b, 20c, 20d and 20e of dielectric material spaced from one another in a direction perpendicular to the axis. The outermost layers 20a and 20e are spaced from one another by at least half the wavelength of the electromagnetic radiation. The layers extend generally in the direction of the axis from a rear end to a front end of the layers. A transition portion 22 electromagnetically couples the layers 20a, 20b, 20c, 20d and 20e directly to a waveguide 21. A front end of the transition portion 22 is connected to the rear end of the layers 20a, 20b, 20c, 20d and 20e and has a dimension in the direction perpendicular to the axis substantially equal to the spacing between the outermost layers 20a, 20e at the rear end of the layers.
CA002165569A 1994-04-20 1995-04-18 Antenna having improved directionality Expired - Fee Related CA2165569C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9407845.8 1994-04-20
GB9407845A GB9407845D0 (en) 1994-04-20 1994-04-20 An antenna
PCT/GB1995/000871 WO1995029518A1 (en) 1994-04-20 1995-04-18 An antenna

Publications (2)

Publication Number Publication Date
CA2165569A1 true CA2165569A1 (en) 1995-11-02
CA2165569C CA2165569C (en) 2003-11-11

Family

ID=10753840

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002165569A Expired - Fee Related CA2165569C (en) 1994-04-20 1995-04-18 Antenna having improved directionality

Country Status (11)

Country Link
US (1) US5757330A (en)
EP (1) EP0705488B1 (en)
JP (1) JP3634372B2 (en)
KR (1) KR100366070B1 (en)
AU (1) AU2221695A (en)
CA (1) CA2165569C (en)
DE (1) DE69529322T2 (en)
DK (1) DK0705488T3 (en)
GB (1) GB9407845D0 (en)
HK (1) HK1012781A1 (en)
WO (1) WO1995029518A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0947812A1 (en) * 1998-03-28 1999-10-06 Endress + Hauser GmbH + Co. Microwave operated level gauge
JP2001320228A (en) * 2000-03-03 2001-11-16 Anritsu Corp Dielectric leakage wave antenna
GB0030932D0 (en) * 2000-12-19 2001-01-31 Radiant Networks Plc Antenna apparatus, communications apparatus and method of transmission
GB0127772D0 (en) * 2001-11-20 2002-01-09 Smiths Group Plc Antennas
JP4733582B2 (en) 2006-07-24 2011-07-27 古野電気株式会社 Antenna device
JP5219794B2 (en) * 2008-12-26 2013-06-26 古野電気株式会社 Dielectric antenna
US8330651B2 (en) * 2009-11-23 2012-12-11 Honeywell International Inc. Single-antenna FM/CW marine radar
JP5639015B2 (en) * 2011-07-06 2014-12-10 古野電気株式会社 Antenna device, radar device, and dielectric member arrangement method

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2785397A (en) * 1946-03-19 1957-03-12 Rca Corp Annular lens antenna
US2743440A (en) * 1951-07-19 1956-04-24 Henry J Riblet Electromagnetic horn
US3366829A (en) * 1965-01-19 1968-01-30 Roger E. Clapp Interactions between waves and electrons
GB1133343A (en) * 1965-09-17 1968-11-13 Nat Res Dev Improvements in or relating to aerial systems
US3854141A (en) * 1973-08-02 1974-12-10 United Atlantic Corp Zoom interferometer antenna
US4488157A (en) * 1982-02-22 1984-12-11 Tokyo Keiki Company Limited Slot array antenna assembly
GB2157082B (en) * 1984-02-16 1987-07-29 Tokyo Keiki Kk Slotted waveguide antenna assembly
JPS60216605A (en) * 1984-03-10 1985-10-30 Tokyo Keiki Co Ltd Slot array antenna system
JPS60178707A (en) * 1984-02-25 1985-09-12 Tokyo Keiki Co Ltd Slot array antenna system
GB2158650B (en) * 1984-03-14 1987-12-23 Tokyo Keiki Kk Slotted waveguide antenna assembly
US4677404A (en) * 1984-12-19 1987-06-30 Martin Marietta Corporation Compound dielectric multi-conductor transmission line
JPH0682975B2 (en) * 1986-01-24 1994-10-19 古野電気株式会社 Slot array antenna device
JPS63206006A (en) * 1987-02-21 1988-08-25 Tokyo Keiki Co Ltd Slot array antenna
JPH0760972B2 (en) * 1991-03-14 1995-06-28 日本無線株式会社 Antenna for ship radar
US5461394A (en) * 1992-02-24 1995-10-24 Chaparral Communications Inc. Dual band signal receiver

Also Published As

Publication number Publication date
GB9407845D0 (en) 1994-06-15
EP0705488B1 (en) 2003-01-08
DE69529322D1 (en) 2003-02-13
DK0705488T3 (en) 2003-04-28
KR100366070B1 (en) 2003-03-06
KR960703279A (en) 1996-06-19
HK1012781A1 (en) 1999-08-06
WO1995029518A1 (en) 1995-11-02
CA2165569C (en) 2003-11-11
US5757330A (en) 1998-05-26
AU2221695A (en) 1995-11-16
EP0705488A1 (en) 1996-04-10
DE69529322T2 (en) 2003-09-04
JPH09504151A (en) 1997-04-22
JP3634372B2 (en) 2005-03-30

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20150420