JPS5637704A - Reflector antenna - Google Patents

Reflector antenna

Info

Publication number
JPS5637704A
JPS5637704A JP11308179A JP11308179A JPS5637704A JP S5637704 A JPS5637704 A JP S5637704A JP 11308179 A JP11308179 A JP 11308179A JP 11308179 A JP11308179 A JP 11308179A JP S5637704 A JPS5637704 A JP S5637704A
Authority
JP
Japan
Prior art keywords
shield
electric wave
frame
shadow boundary
radiation property
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
JP11308179A
Other languages
Japanese (ja)
Inventor
Yasuhiro Kimura
Hiroshi Ushigome
Yoshiro Konno
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 JP11308179A priority Critical patent/JPS5637704A/en
Publication of JPS5637704A publication Critical patent/JPS5637704A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/001—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems for modifying the directional characteristic of an aerial

Landscapes

  • Aerials With Secondary Devices (AREA)

Abstract

PURPOSE:To reduce the retroradiation caused at the periphery of the shadow boundary and the diffracted wave, by providing the electric wave diffusing plate at the tip of the masking shield and at the same time attaching the electric wave absorber onto the inner wall of the masking shield. CONSTITUTION:The electric wave absorber 5 is attached onto the inner wall of the masking shield 4 in an appropriate width to absorb the spill-over power of the primary radiator 3 which contributes to the radiation property around the shadow boundary. Thus the radiation property is suppressed at the shadow boundary and its periphery. And both the lengths (h) and (l) of the shield 4 and the electric wave diffusing plate 6 which are obtained from the equations 1 and 2 are effective to the entire circumference of the shield 4 and the outer circumference frame 7 in case when the radiation property of the primary radiator 3 is in the rotational symmetry. As a result, the electric field can be reduced at the tip of the shield 4 and the frame 7, and accordingly the retroradiation property can be suppressed. In the equations, D shows the aperture diameter of the reflector 2, lambda is the wavelength, i=3, 5..., N=h-H, W=(H+h)<2>-H.h, and H is the height of the frame 7 respectively.
JP11308179A 1979-09-04 1979-09-04 Reflector antenna Pending JPS5637704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11308179A JPS5637704A (en) 1979-09-04 1979-09-04 Reflector antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11308179A JPS5637704A (en) 1979-09-04 1979-09-04 Reflector antenna

Publications (1)

Publication Number Publication Date
JPS5637704A true JPS5637704A (en) 1981-04-11

Family

ID=14602992

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11308179A Pending JPS5637704A (en) 1979-09-04 1979-09-04 Reflector antenna

Country Status (1)

Country Link
JP (1) JPS5637704A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4957748A (en) * 1972-10-02 1974-06-05

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4957748A (en) * 1972-10-02 1974-06-05

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