JPS57142006A - Dual reflecting mirror type antenna device - Google Patents

Dual reflecting mirror type antenna device

Info

Publication number
JPS57142006A
JPS57142006A JP2907181A JP2907181A JPS57142006A JP S57142006 A JPS57142006 A JP S57142006A JP 2907181 A JP2907181 A JP 2907181A JP 2907181 A JP2907181 A JP 2907181A JP S57142006 A JPS57142006 A JP S57142006A
Authority
JP
Japan
Prior art keywords
mirror
radiated
waves
subreflecting
electric field
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
JP2907181A
Other languages
Japanese (ja)
Inventor
Akira Shiraishi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2907181A priority Critical patent/JPS57142006A/en
Publication of JPS57142006A publication Critical patent/JPS57142006A/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
    • H01Q19/026—Means for reducing undesirable effects for reducing the primary feed spill-over
    • 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
    • H01Q19/025—Means for reducing undesirable effects for optimizing the matching of the primary feed, e.g. vertex plates

Landscapes

  • Aerials With Secondary Devices (AREA)

Abstract

PURPOSE:To block leaked electromagnetic waves from a subreflecting mirror and to increase the directivity with broad angles, by adding a metallic body between the primary radiator and the subreflecting mirror within the range where the reflecting waves from the subreflecting mirror are radiated to a main reflecting mirror. CONSTITUTION:A metallic substance 2 is fitted annularly around the external circumference of a subreflecting mirror 1. Taking an electric field vector of electromagnetic waves radiated from a primary radiator 3, not reflected on the subreflection mirror 1 but leaked directly beackward as Es, electric field vector of diffracted waves which are generated at the ridge of the substance 2 through radiated electromagnetic waves as Ed, and electric field vector radiated with a current vector J induced on the metallic substance 2 as EI(J), the width W of a ring of the metallic substance 2 and fitting angle thetaT are adjusted and the EI(J) is controlled, allowing to block the leaked electromgnetic waves from the subreflecting mirror and to achieve the wide angle directivity, by making Es+Ed almost equal to -EI(J).
JP2907181A 1981-02-27 1981-02-27 Dual reflecting mirror type antenna device Pending JPS57142006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2907181A JPS57142006A (en) 1981-02-27 1981-02-27 Dual reflecting mirror type antenna device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2907181A JPS57142006A (en) 1981-02-27 1981-02-27 Dual reflecting mirror type antenna device

Publications (1)

Publication Number Publication Date
JPS57142006A true JPS57142006A (en) 1982-09-02

Family

ID=12266118

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2907181A Pending JPS57142006A (en) 1981-02-27 1981-02-27 Dual reflecting mirror type antenna device

Country Status (1)

Country Link
JP (1) JPS57142006A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1128468A3 (en) * 2000-02-25 2004-01-07 Andrew AG Reflector antennas for microwaves

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5495157A (en) * 1978-01-13 1979-07-27 Mitsubishi Electric Corp Antenna unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5495157A (en) * 1978-01-13 1979-07-27 Mitsubishi Electric Corp Antenna unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1128468A3 (en) * 2000-02-25 2004-01-07 Andrew AG Reflector antennas for microwaves

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