JPS56110305A - Fan-shaped beam antenna - Google Patents

Fan-shaped beam antenna

Info

Publication number
JPS56110305A
JPS56110305A JP1204480A JP1204480A JPS56110305A JP S56110305 A JPS56110305 A JP S56110305A JP 1204480 A JP1204480 A JP 1204480A JP 1204480 A JP1204480 A JP 1204480A JP S56110305 A JPS56110305 A JP S56110305A
Authority
JP
Japan
Prior art keywords
reflectors
caustic
radiation
alpha
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
JP1204480A
Other languages
Japanese (ja)
Inventor
Ikuo Sato
Hirokazu Nagasawa
Mitsuhiro Kusano
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 JP1204480A priority Critical patent/JPS56110305A/en
Publication of JPS56110305A publication Critical patent/JPS56110305A/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
    • H01Q19/10—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)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

PURPOSE:To simplify the feeding system, by setting each caustic curve of each parabolic reflector and each phase center of the primary radiator nearly on the same level and at the same time avoiding the caustic curves from being put on the same straight line. CONSTITUTION:The main reflector 1 is formed by combining the parabolic reflectors 2 and 3. The caustic curves 5 and 6 of the reflectors 2 and 3 cross with each other at a point F and are inclined to the axis Y by an angle of alpha. The primary radiator 10 of the spherical wave source is located at the point F to give an even illumination to the reflectors 2 and 3. The electric wave radiated from the radiator 10 is reflected by the reflectors 2 and 3 and then turned into a radiation beam that has the maximum direction of radiation in the direction of an angle of + or -alpha within the Y-Z plane. Thus a radiation beam is composed in the form of the sum of vectors of radiation beams as a whole.
JP1204480A 1980-02-05 1980-02-05 Fan-shaped beam antenna Pending JPS56110305A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1204480A JPS56110305A (en) 1980-02-05 1980-02-05 Fan-shaped beam antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1204480A JPS56110305A (en) 1980-02-05 1980-02-05 Fan-shaped beam antenna

Publications (1)

Publication Number Publication Date
JPS56110305A true JPS56110305A (en) 1981-09-01

Family

ID=11794590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1204480A Pending JPS56110305A (en) 1980-02-05 1980-02-05 Fan-shaped beam antenna

Country Status (1)

Country Link
JP (1) JPS56110305A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02239703A (en) * 1989-03-14 1990-09-21 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna system using shaped beam reflecting mirror
JPH03108805A (en) * 1989-05-12 1991-05-09 Kawamoto Hirotaka Flume type parabolic antenna for multi-direction simultaneous reception
EP3989362A4 (en) * 2019-06-20 2022-08-10 NEC Corporation Antenna device and method for designing same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02239703A (en) * 1989-03-14 1990-09-21 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna system using shaped beam reflecting mirror
JPH03108805A (en) * 1989-05-12 1991-05-09 Kawamoto Hirotaka Flume type parabolic antenna for multi-direction simultaneous reception
EP3989362A4 (en) * 2019-06-20 2022-08-10 NEC Corporation Antenna device and method for designing same
US11769953B2 (en) 2019-06-20 2023-09-26 Nec Corporation Antenna device and method for designing same

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