JPS5592002A - Antenna unit - Google Patents

Antenna unit

Info

Publication number
JPS5592002A
JPS5592002A JP4879A JP4879A JPS5592002A JP S5592002 A JPS5592002 A JP S5592002A JP 4879 A JP4879 A JP 4879A JP 4879 A JP4879 A JP 4879A JP S5592002 A JPS5592002 A JP S5592002A
Authority
JP
Japan
Prior art keywords
reflection mirror
electromagnetic waves
skirt
face
high frequency
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
JP4879A
Other languages
Japanese (ja)
Other versions
JPS6158043B2 (en
Inventor
Toshio Sato
Shizuo Endo
Ikuo Sato
Yonemoto Iida
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
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK, NEC Corp, Nippon Electric Co Ltd filed Critical Kokusai Denshin Denwa KK
Priority to JP4879A priority Critical patent/JPS5592002A/en
Publication of JPS5592002A publication Critical patent/JPS5592002A/en
Publication of JPS6158043B2 publication Critical patent/JPS6158043B2/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
    • H01Q19/18—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)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

PURPOSE:To improve performance by providing a skirt around an auxiliary reflection mirror so that reflection effects may be given in a low frequency band and shielding effects on the main reflection mirror aperture face may be reduced in a high frequency band. CONSTITUTION:Auxiliary reflection mirror 2 and skirt 4' are arranged coaxially in the center area and the outside circumference area respectively. Though auxiliary reflection mirror 2 is formed by a metallic reflection face, a metallic face or a metallic film provided with plural round holes whose diameter is selected to be longer than the half value of the free space wave length of a high frequency out of two frequency bands and be shorter than the half value of the free space wave length of the low frequency is used as skirt 4'. As a result, the cut-off frequency for electromagnetic waves of holes can be utilized to transmit electromagnetic waves of the high frequency through holes while holding shielding effects for electromagnetic waves of the low frequency.
JP4879A 1979-01-05 1979-01-05 Antenna unit Granted JPS5592002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4879A JPS5592002A (en) 1979-01-05 1979-01-05 Antenna unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4879A JPS5592002A (en) 1979-01-05 1979-01-05 Antenna unit

Publications (2)

Publication Number Publication Date
JPS5592002A true JPS5592002A (en) 1980-07-12
JPS6158043B2 JPS6158043B2 (en) 1986-12-10

Family

ID=11463378

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4879A Granted JPS5592002A (en) 1979-01-05 1979-01-05 Antenna unit

Country Status (1)

Country Link
JP (1) JPS5592002A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58184910U (en) * 1982-06-02 1983-12-08 日本電気株式会社 antenna reflector
WO2021106093A1 (en) 2019-11-27 2021-06-03 三菱電機株式会社 Reflector antenna device
CN113015421A (en) * 2021-01-25 2021-06-22 国网浙江省电力有限公司金华供电公司 Electromagnetic shielding device based on overhead line X-ray detection and verification method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52107752A (en) * 1976-03-08 1977-09-09 Kokusai Denshin Denwa Co Ltd Equiibeam width reflecting mirror antenna

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52107752A (en) * 1976-03-08 1977-09-09 Kokusai Denshin Denwa Co Ltd Equiibeam width reflecting mirror antenna

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58184910U (en) * 1982-06-02 1983-12-08 日本電気株式会社 antenna reflector
WO2021106093A1 (en) 2019-11-27 2021-06-03 三菱電機株式会社 Reflector antenna device
US11777226B2 (en) 2019-11-27 2023-10-03 Mitsubishi Electric Corporation Reflector antenna device
CN113015421A (en) * 2021-01-25 2021-06-22 国网浙江省电力有限公司金华供电公司 Electromagnetic shielding device based on overhead line X-ray detection and verification method

Also Published As

Publication number Publication date
JPS6158043B2 (en) 1986-12-10

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