JPS5495158A - Antenna unit - Google Patents

Antenna unit

Info

Publication number
JPS5495158A
JPS5495158A JP244778A JP244778A JPS5495158A JP S5495158 A JPS5495158 A JP S5495158A JP 244778 A JP244778 A JP 244778A JP 244778 A JP244778 A JP 244778A JP S5495158 A JPS5495158 A JP S5495158A
Authority
JP
Japan
Prior art keywords
reflection mirror
metallic plate
primary radiator
electromagnetic wave
wave shielding
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
JP244778A
Other languages
Japanese (ja)
Other versions
JPS603242B2 (en
Inventor
Takashi Hirukoi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP244778A priority Critical patent/JPS603242B2/en
Publication of JPS5495158A publication Critical patent/JPS5495158A/en
Publication of JPS603242B2 publication Critical patent/JPS603242B2/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01Q19/02—Details
    • H01Q19/021—Means for reducing undesirable effects
    • H01Q19/022—Means for reducing undesirable effects for reducing the edge scattering of reflectors

Landscapes

  • Aerials With Secondary Devices (AREA)

Abstract

PURPOSE:To reduce the electromagnetic wave which is propagated to the side direction and the back direction of an antenna, by providing two or more electromagnetic wave shielding materials along the circumference of the aperture of the reflection mirror of the effective area antenna and opening a proper hole in the shielding material nearest to the reflection mirror. CONSTITUTION:In the effective area antenna which is constituted by primary radiator 5 and reflection mirror 1, diffracted wave shielding plate 6 using hole- opened metallic plate 7 is provided along the circumference of the aperture of reflection mirror 1. Further, one or more diffracted wave shielding plates 6 are provided in the position which does not protrude from edge 4b of metallic plate 7 at the view from primary radiator 5. These shielding plates 6 are so constituted that the line connecting edge 4b of shielding plates 6, edge 4a of metallic plate 7, and the phase center of primary radiator 5 may be convex to the advancing direction of the electromagnetic wave reflected from reflection mirror 1. A metallic plate or mesh-shaped or linear metal is used as diffracted wave shielding materials 6.
JP244778A 1978-01-13 1978-01-13 antenna device Expired JPS603242B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP244778A JPS603242B2 (en) 1978-01-13 1978-01-13 antenna device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP244778A JPS603242B2 (en) 1978-01-13 1978-01-13 antenna device

Publications (2)

Publication Number Publication Date
JPS5495158A true JPS5495158A (en) 1979-07-27
JPS603242B2 JPS603242B2 (en) 1985-01-26

Family

ID=11529523

Family Applications (1)

Application Number Title Priority Date Filing Date
JP244778A Expired JPS603242B2 (en) 1978-01-13 1978-01-13 antenna device

Country Status (1)

Country Link
JP (1) JPS603242B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009004933A (en) * 2007-06-20 2009-01-08 Japan Radio Co Ltd Dual-reflector antenna
FR2963487A1 (en) * 2010-08-02 2012-02-03 Alcatel Lucent PARABOLIC REFLECTOR ANTENNA

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009004933A (en) * 2007-06-20 2009-01-08 Japan Radio Co Ltd Dual-reflector antenna
FR2963487A1 (en) * 2010-08-02 2012-02-03 Alcatel Lucent PARABOLIC REFLECTOR ANTENNA
EP2416449A1 (en) * 2010-08-02 2012-02-08 Alcatel Lucent Parabolic-reflector antenna

Also Published As

Publication number Publication date
JPS603242B2 (en) 1985-01-26

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