JPS5537079A - Offset antenna device - Google Patents

Offset antenna device

Info

Publication number
JPS5537079A
JPS5537079A JP11052678A JP11052678A JPS5537079A JP S5537079 A JPS5537079 A JP S5537079A JP 11052678 A JP11052678 A JP 11052678A JP 11052678 A JP11052678 A JP 11052678A JP S5537079 A JPS5537079 A JP S5537079A
Authority
JP
Japan
Prior art keywords
reflector
points
radiation pattern
wide
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.)
Granted
Application number
JP11052678A
Other languages
Japanese (ja)
Other versions
JPS6028443B2 (en
Inventor
Tadashi Takano
Hidekazu Ogawa
Takashi Kataki
Katsuhiko Aoki
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
Nippon Telegraph and Telephone Corp
Original Assignee
Mitsubishi Electric Corp
Nippon Telegraph and Telephone 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, Nippon Telegraph and Telephone Corp filed Critical Mitsubishi Electric Corp
Priority to JP11052678A priority Critical patent/JPS6028443B2/en
Publication of JPS5537079A publication Critical patent/JPS5537079A/en
Publication of JPS6028443B2 publication Critical patent/JPS6028443B2/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
    • H01Q19/02—Details
    • H01Q19/021—Means for reducing undesirable effects
    • H01Q19/026—Means for reducing undesirable effects for reducing the primary feed spill-over

Abstract

PURPOSE:To lower the level of the diffracted wave which affects the wide-angle radiation pattern and thus to ensure the radiation for the excellent wide-angle radiation pattern by providing the magnifying glass surface doubling the line identifying surface at the periphery of the secondary reflector. CONSTITUTION:The offset-type antenna device is constituted with primary radiator 1, secondary reflector 2 formed by part of the rotary hyperboloid and main reflector 3 formed by part of the reverse paraboloid. Then magnifying glass surface part 4 is formed at the periphery of reflector 2. Owing to part 4, the waves radiated form the lower part of the phase center of radiator 1 are hit points P2 and P3 or P1 and P4 on part 4 to be reflected to points Q2 and Q3 or Q1 and Q4 each on reflector 3. Then extension l is decided for the straight line going to point P on the ambient curve from fixed point Q1 of secondary reflector 2, along with setting of the fixed angle alpha, and the field levels of points P3 and P4 are set lower than those of points P2 and P1. As a result, the level of the diffracted wave affecting the wide- angle radiation pattern is lowered down, thus ensuring the radiation of the excellent wide-angle radiation pattern from reflector 3.
JP11052678A 1978-09-08 1978-09-08 offset antenna device Expired JPS6028443B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11052678A JPS6028443B2 (en) 1978-09-08 1978-09-08 offset antenna device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11052678A JPS6028443B2 (en) 1978-09-08 1978-09-08 offset antenna device

Publications (2)

Publication Number Publication Date
JPS5537079A true JPS5537079A (en) 1980-03-14
JPS6028443B2 JPS6028443B2 (en) 1985-07-04

Family

ID=14538032

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11052678A Expired JPS6028443B2 (en) 1978-09-08 1978-09-08 offset antenna device

Country Status (1)

Country Link
JP (1) JPS6028443B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6298805A (en) * 1985-10-24 1987-05-08 Nec Corp Sub-reflection mirror antenna

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6420055U (en) * 1987-07-24 1989-01-31
JPH03127465U (en) * 1990-04-05 1991-12-20

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6298805A (en) * 1985-10-24 1987-05-08 Nec Corp Sub-reflection mirror antenna

Also Published As

Publication number Publication date
JPS6028443B2 (en) 1985-07-04

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