JPS57212803A - Antenna device of automatic directivity switching - Google Patents

Antenna device of automatic directivity switching

Info

Publication number
JPS57212803A
JPS57212803A JP9912581A JP9912581A JPS57212803A JP S57212803 A JPS57212803 A JP S57212803A JP 9912581 A JP9912581 A JP 9912581A JP 9912581 A JP9912581 A JP 9912581A JP S57212803 A JPS57212803 A JP S57212803A
Authority
JP
Japan
Prior art keywords
circuit
antenna
output
antenna element
switching
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
JP9912581A
Other languages
Japanese (ja)
Inventor
Minoru Miyata
Hirobumi Tsutsui
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP9912581A priority Critical patent/JPS57212803A/en
Publication of JPS57212803A publication Critical patent/JPS57212803A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
    • H04B7/0808—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching comparing all antennas before reception

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

PURPOSE:To automatically select the best antenna element, by detecting the best point of the state of screen and fixing the sequential selective operation of an antenna switching means. CONSTITUTION:A full output of a plurality of antenna elements 9 is applied to a switching circuit 10. The circuit 10 consists of a switch group electronically controlled and an output of the antenna element selected by the switching operation of the circuit 10 is applied to a receiver 11 as an input. The circuit 10 sequentially selects antenna elements (a-d) in the suitable order by a control circuit 12, stops the sequential selecting operation through the control of the control circuit 12 with the output of the best point detection of a best point detection circuit 13, an antenna element connected at stop is finally selected and applied to the receiver 11.
JP9912581A 1981-06-25 1981-06-25 Antenna device of automatic directivity switching Pending JPS57212803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9912581A JPS57212803A (en) 1981-06-25 1981-06-25 Antenna device of automatic directivity switching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9912581A JPS57212803A (en) 1981-06-25 1981-06-25 Antenna device of automatic directivity switching

Publications (1)

Publication Number Publication Date
JPS57212803A true JPS57212803A (en) 1982-12-27

Family

ID=14239036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9912581A Pending JPS57212803A (en) 1981-06-25 1981-06-25 Antenna device of automatic directivity switching

Country Status (1)

Country Link
JP (1) JPS57212803A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022807A (en) * 1983-07-18 1985-02-05 Matsushita Electric Ind Co Ltd Automatic directivity changeover antenna device
JPS6022806A (en) * 1983-07-18 1985-02-05 Matsushita Electric Ind Co Ltd Automatic directivity changeover antenna device
US4788549A (en) * 1984-11-27 1988-11-29 Toyota Jidosha Kabushiki Kaisha Automotive antenna system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4990853A (en) * 1972-12-28 1974-08-30

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4990853A (en) * 1972-12-28 1974-08-30

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022807A (en) * 1983-07-18 1985-02-05 Matsushita Electric Ind Co Ltd Automatic directivity changeover antenna device
JPS6022806A (en) * 1983-07-18 1985-02-05 Matsushita Electric Ind Co Ltd Automatic directivity changeover antenna device
US4788549A (en) * 1984-11-27 1988-11-29 Toyota Jidosha Kabushiki Kaisha Automotive antenna system

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