JPS54148460A - Reflector antenna device - Google Patents

Reflector antenna device

Info

Publication number
JPS54148460A
JPS54148460A JP5727878A JP5727878A JPS54148460A JP S54148460 A JPS54148460 A JP S54148460A JP 5727878 A JP5727878 A JP 5727878A JP 5727878 A JP5727878 A JP 5727878A JP S54148460 A JPS54148460 A JP S54148460A
Authority
JP
Japan
Prior art keywords
antenna device
reflector
mirror surface
point
leak power
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
JP5727878A
Other languages
Japanese (ja)
Other versions
JPS604605B2 (en
Inventor
Takashi Kataki
Shuji Urasaki
Shigeru Makino
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 JP5727878A priority Critical patent/JPS604605B2/en
Publication of JPS54148460A publication Critical patent/JPS54148460A/en
Publication of JPS604605B2 publication Critical patent/JPS604605B2/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
    • H01Q19/10—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 reflecting surfaces
    • H01Q19/18—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 reflecting surfaces having two or more spaced reflecting surfaces
    • H01Q19/19—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 reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface

Landscapes

  • Aerials With Secondary Devices (AREA)

Abstract

PURPOSE:To decrease the leak power for the antenna device used at plural frequency bands and thus to enhance the performance of the antenna device by securing the special mirror surface at the periphery of the subreflector. CONSTITUTION:Mirror surface part S1S2 and A1'S2' of the special shapes are formed at the periphery of central mirror surface S1S1' of subreflector 4 featuring a hyperboloid containing focal point F1 and F2. Now, the loci at the point where the electric waves reflected from periphery part M1M2 of main reflector 3 feature the equal phase is referred to as M2M2' respectively. Thus, the locus forms an arc centering on point O on the straight line parallel to the axis of the reflector and passing through point M1. This arc forms curve S1S2. As a result, the electric wave from F1 is refleted on surface S1S' in the high frequency band, and then goes toward mirror surface M1M1' of reflector 3. Thus, the leak power is reduced. While in the low frequency band, the phase error is reduced by reflector 4 of a special shape thus to decrease the leak power. In such way, the leak power can be decreased for the antenna device used at plural frequency bands, thus enhancing the performance of the antenna device.
JP5727878A 1978-05-15 1978-05-15 Reflector antenna device Expired JPS604605B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5727878A JPS604605B2 (en) 1978-05-15 1978-05-15 Reflector antenna device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5727878A JPS604605B2 (en) 1978-05-15 1978-05-15 Reflector antenna device

Publications (2)

Publication Number Publication Date
JPS54148460A true JPS54148460A (en) 1979-11-20
JPS604605B2 JPS604605B2 (en) 1985-02-05

Family

ID=13051063

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5727878A Expired JPS604605B2 (en) 1978-05-15 1978-05-15 Reflector antenna device

Country Status (1)

Country Link
JP (1) JPS604605B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102846A1 (en) * 1982-09-07 1984-03-14 Andrew Corporation Dual reflector microwave antenna

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01178602A (en) * 1988-01-11 1989-07-14 Toshiba Eng & Constr Co Ltd Snow melting method
JPH08269907A (en) * 1995-03-31 1996-10-15 Toyo Foods Syst Kk Melting of snow on surface of land and freezing preventing structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102846A1 (en) * 1982-09-07 1984-03-14 Andrew Corporation Dual reflector microwave antenna

Also Published As

Publication number Publication date
JPS604605B2 (en) 1985-02-05

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