JPS57176807A - Sectoral beam antenna - Google Patents

Sectoral beam antenna

Info

Publication number
JPS57176807A
JPS57176807A JP6228181A JP6228181A JPS57176807A JP S57176807 A JPS57176807 A JP S57176807A JP 6228181 A JP6228181 A JP 6228181A JP 6228181 A JP6228181 A JP 6228181A JP S57176807 A JPS57176807 A JP S57176807A
Authority
JP
Japan
Prior art keywords
reflecting mirror
sectoral
flat
placing
beam antenna
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
JP6228181A
Other languages
Japanese (ja)
Other versions
JPH023562B2 (en
Inventor
Yuji Numano
Yasunaga Murakami
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.)
DKK Co Ltd
Original Assignee
Denki Kogyo 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 Denki Kogyo Co Ltd filed Critical Denki Kogyo Co Ltd
Priority to JP6228181A priority Critical patent/JPS57176807A/en
Publication of JPS57176807A publication Critical patent/JPS57176807A/en
Publication of JPH023562B2 publication Critical patent/JPH023562B2/ja
Granted 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
    • H01Q19/12—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 wherein the surfaces are concave

Landscapes

  • Aerials With Secondary Devices (AREA)

Abstract

PURPOSE:To obtain sectoral beam having flat tip of main beam directivity and steep rise of beam by placing a primary horn at the shortest focus position of a reflecting mirror formed by pressing and deforming a centered parabolic reflecting mirror. CONSTITUTION:When uniform pressure directed from one end and another end of the X-axis to the focus F0 is applied to an open periphery of an original centered parabolic reflecting mirror 1, a deformed reflecting mirror 4 is formed as the reflecting mirror 1 is regarded as a flat spherical shell and the periphery is not perfectly free. Intersecting line of a fixed plane and Z of this reflecting mirror forms an ellipse with major axis A'B'. By placing a primary horn, not shown in the figure, that has proper illumination distribution at F2 point which is positioned at the shortest focal length, above-mentioned reflecting mirror works as a sectoral beam antenna. The tip of main beam directivity of this sectoral beam antenna is flat and sectoral beam having steep rise of beam can be obtained. Further, it has excellent F/B characteristics.
JP6228181A 1981-04-24 1981-04-24 Sectoral beam antenna Granted JPS57176807A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6228181A JPS57176807A (en) 1981-04-24 1981-04-24 Sectoral beam antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6228181A JPS57176807A (en) 1981-04-24 1981-04-24 Sectoral beam antenna

Publications (2)

Publication Number Publication Date
JPS57176807A true JPS57176807A (en) 1982-10-30
JPH023562B2 JPH023562B2 (en) 1990-01-24

Family

ID=13195589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6228181A Granted JPS57176807A (en) 1981-04-24 1981-04-24 Sectoral beam antenna

Country Status (1)

Country Link
JP (1) JPS57176807A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2629643A1 (en) * 1988-03-29 1989-10-06 Kiffer Jean Claude Electromagnetic wave sensor with substantially parabolic reflector
JPH02239703A (en) * 1989-03-14 1990-09-21 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna system using shaped beam reflecting mirror
FR2724059A1 (en) * 1994-08-31 1996-03-01 Telediffusion Fse ANTENNA REFLECTOR FOR MULTIPLE TELECOMMUNICATIONS BEAMS

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2629643A1 (en) * 1988-03-29 1989-10-06 Kiffer Jean Claude Electromagnetic wave sensor with substantially parabolic reflector
JPH02239703A (en) * 1989-03-14 1990-09-21 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna system using shaped beam reflecting mirror
FR2724059A1 (en) * 1994-08-31 1996-03-01 Telediffusion Fse ANTENNA REFLECTOR FOR MULTIPLE TELECOMMUNICATIONS BEAMS
EP0700118A1 (en) * 1994-08-31 1996-03-06 Telediffusion De France Antenna reflector for plural beams of communication systems

Also Published As

Publication number Publication date
JPH023562B2 (en) 1990-01-24

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