JPS572103A - Offset antenna with lens - Google Patents

Offset antenna with lens

Info

Publication number
JPS572103A
JPS572103A JP7580980A JP7580980A JPS572103A JP S572103 A JPS572103 A JP S572103A JP 7580980 A JP7580980 A JP 7580980A JP 7580980 A JP7580980 A JP 7580980A JP S572103 A JPS572103 A JP S572103A
Authority
JP
Japan
Prior art keywords
lens
offset
antenna
focus
optical path
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
JP7580980A
Other languages
Japanese (ja)
Other versions
JPH0350443B2 (en
Inventor
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 JP7580980A priority Critical patent/JPS572103A/en
Publication of JPS572103A publication Critical patent/JPS572103A/en
Publication of JPH0350443B2 publication Critical patent/JPH0350443B2/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 reduce the cross polarized wave component which is caused by a main reflector, by using a dielectric lens to an offset antenna to be used for a microwave or the like and thus ensure a certain length of an optical path from a radiator to a plane of an antenna aperture. CONSTITUTION:An electric wave lens 3 made of the dielectric substance is put between a main reflector 1 of an offset-type parabola antenna and a primary radiator 2. Surfaces S1 and S2 of a micropart 4 of the lens 3 are formed as a part of the rotary hyperboloid with axes z1 and z2 which are parallel to each other and with focal distances f1 and f2 plus focuses F1 and F2 respectively. The length becomes constant for an optical path from the focus F1 of an electric wave that travels with refraction after made incident to the lens 3 to the surface on radius R of the focus F2. Thus the spherical wave radiation line led from F1 is converted into the spherical wave radiation line of F2 through the lens 3. As a result, the cross polarized wave component caused by the reflector 1 can be reduced without losing the characteristics of an offset-type parabola antenna.
JP7580980A 1980-06-05 1980-06-05 Offset antenna with lens Granted JPS572103A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7580980A JPS572103A (en) 1980-06-05 1980-06-05 Offset antenna with lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7580980A JPS572103A (en) 1980-06-05 1980-06-05 Offset antenna with lens

Publications (2)

Publication Number Publication Date
JPS572103A true JPS572103A (en) 1982-01-07
JPH0350443B2 JPH0350443B2 (en) 1991-08-01

Family

ID=13586882

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7580980A Granted JPS572103A (en) 1980-06-05 1980-06-05 Offset antenna with lens

Country Status (1)

Country Link
JP (1) JPS572103A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5939550A (en) * 1982-08-30 1984-03-03 松下電工株式会社 Molding die for aggregate decorative material
JPS6187402A (en) * 1984-10-04 1986-05-02 Murata Mfg Co Ltd Antenna using plural dielectrics
US5743983A (en) * 1992-07-10 1998-04-28 Tri-Wall K.K. Forming method for interior trim material made of corrugated cardboard

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5939550A (en) * 1982-08-30 1984-03-03 松下電工株式会社 Molding die for aggregate decorative material
JPS6187402A (en) * 1984-10-04 1986-05-02 Murata Mfg Co Ltd Antenna using plural dielectrics
US5743983A (en) * 1992-07-10 1998-04-28 Tri-Wall K.K. Forming method for interior trim material made of corrugated cardboard

Also Published As

Publication number Publication date
JPH0350443B2 (en) 1991-08-01

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