JPS54134959A - Radio-wave shielding board - Google Patents

Radio-wave shielding board

Info

Publication number
JPS54134959A
JPS54134959A JP4297378A JP4297378A JPS54134959A JP S54134959 A JPS54134959 A JP S54134959A JP 4297378 A JP4297378 A JP 4297378A JP 4297378 A JP4297378 A JP 4297378A JP S54134959 A JPS54134959 A JP S54134959A
Authority
JP
Japan
Prior art keywords
radio
wave
shielding board
wave shielding
angle
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.)
Pending
Application number
JP4297378A
Other languages
Japanese (ja)
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 JP4297378A priority Critical patent/JPS54134959A/en
Publication of JPS54134959A publication Critical patent/JPS54134959A/en
Pending 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 improve wide-angle radiation characteristics by providing a radio- wave shielding board, composed of several triangle pieces, to the circumference of the primary radiator or reflector of an antenna. CONSTITUTION:At the circumference of reflector 1 of the rotation-symmetric parabolic antenna, radio-wave shielding board 3 is arranged which is made of a metal boad, a net of metal meshes, or a radio-wave absorber. This radio-wave shielding board 3 is composed of several triangle pieces and one side is connected to the circumference of reflector 1. Incident wave 6 to one diffraction point 7 at the edge of radio-wave shielding board 3 from primary radiator 2 is diffracted in a conic shape with an angle twice as wide as that formed of the tangent of the edge at diffraction point 7 and the progressive direction of incident wave 6. The angle extent diffracted wave 8 propagates can therefore be set less than 180 degrees by fixing the angle, formed on the side of the triangle piece, the edge of radio-wave shielding board 3, and the progressive direction of incident wave 8, less than 45 degrees.
JP4297378A 1978-04-12 1978-04-12 Radio-wave shielding board Pending JPS54134959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4297378A JPS54134959A (en) 1978-04-12 1978-04-12 Radio-wave shielding board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4297378A JPS54134959A (en) 1978-04-12 1978-04-12 Radio-wave shielding board

Publications (1)

Publication Number Publication Date
JPS54134959A true JPS54134959A (en) 1979-10-19

Family

ID=12650973

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4297378A Pending JPS54134959A (en) 1978-04-12 1978-04-12 Radio-wave shielding board

Country Status (1)

Country Link
JP (1) JPS54134959A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56169904A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPS56169903A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPS56169902A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPS56169905A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPS56169908A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPS56169906A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPS56169907A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
US5341150A (en) * 1988-09-28 1994-08-23 Georgia Tech Research Corp. Low sidelobe reflector
US20220149536A1 (en) * 2020-11-09 2022-05-12 Hughes Network Systems, Llc Reducing reflector antenna spillover lobes and back lobes in satellite communication systems

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56169904A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPS56169903A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPS56169902A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPS56169905A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPS56169908A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPS56169906A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPS56169907A (en) * 1980-06-03 1981-12-26 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna device
JPH0221165B2 (en) * 1980-06-03 1990-05-14 Kokusai Denshin Denwa Kk
JPH0221166B2 (en) * 1980-06-03 1990-05-14 Kokusai Denshin Denwa Kk
JPH0221167B2 (en) * 1980-06-03 1990-05-14 Kokusai Denshin Denwa Kk
JPH0221168B2 (en) * 1980-06-03 1990-05-14 Kokusai Denshin Denwa Kk
JPH0221171B2 (en) * 1980-06-03 1990-05-14 Kokusai Denshin Denwa Kk
JPH0221169B2 (en) * 1980-06-03 1990-05-14 Kokusai Denshin Denwa Kk
JPH0221170B2 (en) * 1980-06-03 1990-05-14 Kokusai Denshin Denwa Kk
US5341150A (en) * 1988-09-28 1994-08-23 Georgia Tech Research Corp. Low sidelobe reflector
US20220149536A1 (en) * 2020-11-09 2022-05-12 Hughes Network Systems, Llc Reducing reflector antenna spillover lobes and back lobes in satellite communication systems

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