JPS5657365A - Television reception antenna device for mounting onto travelling object - Google Patents

Television reception antenna device for mounting onto travelling object

Info

Publication number
JPS5657365A
JPS5657365A JP13455679A JP13455679A JPS5657365A JP S5657365 A JPS5657365 A JP S5657365A JP 13455679 A JP13455679 A JP 13455679A JP 13455679 A JP13455679 A JP 13455679A JP S5657365 A JPS5657365 A JP S5657365A
Authority
JP
Japan
Prior art keywords
antennas
wave detection
circuit
detection output
antenna
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
JP13455679A
Other languages
Japanese (ja)
Other versions
JPS625387B2 (en
Inventor
Michiro Ikenishi
Yumio Kawai
Hideo Iwata
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 JP13455679A priority Critical patent/JPS5657365A/en
Publication of JPS5657365A publication Critical patent/JPS5657365A/en
Publication of JPS625387B2 publication Critical patent/JPS625387B2/ja
Granted 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
    • H04B7/0811—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 during preamble or gap period

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Details Of Television Systems (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To always ensure the TV reception in the best condition, by giving a comparison between the wave detection output levels of the two antennas and in the vertical flyback time with every 1/60sec and then connecting the antenna having a higher level to the picture receiver. CONSTITUTION:In the switching circuit 5, a switching is carried out via the semiconductor switching element or the like so that the output of either one of the antennas 1 and 2 may be connected to the antenna input circuit of the TV picture receiver 6 installed in the car 10. Then the TV video signal Ea and the vertical synchronous signal Kb of the wave detection output are extracted out of the receiver 6 to be led to the control circuit 7. At the same time, the sampling switch control signal Ks of a fixed cycle is produced in the circuit 7 based on the reference time within the vertical flyback time TV. In this case, a comparison is given for the wave detection output levels between the antennas 1 and 2 in the vertical flyback time with every 1/60sec. And the antenna having a higher level is connected to the picture receiver. As a result, the TV reception is possible at all times in the best condition.
JP13455679A 1979-10-17 1979-10-17 Television reception antenna device for mounting onto travelling object Granted JPS5657365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13455679A JPS5657365A (en) 1979-10-17 1979-10-17 Television reception antenna device for mounting onto travelling object

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13455679A JPS5657365A (en) 1979-10-17 1979-10-17 Television reception antenna device for mounting onto travelling object

Publications (2)

Publication Number Publication Date
JPS5657365A true JPS5657365A (en) 1981-05-19
JPS625387B2 JPS625387B2 (en) 1987-02-04

Family

ID=15131078

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13455679A Granted JPS5657365A (en) 1979-10-17 1979-10-17 Television reception antenna device for mounting onto travelling object

Country Status (1)

Country Link
JP (1) JPS5657365A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60165879A (en) * 1984-02-08 1985-08-29 Sony Corp Switching device of television antenna
JP2002314469A (en) * 2001-04-17 2002-10-25 Uniden Corp Diversity antenna changeover device and method, and program

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60165879A (en) * 1984-02-08 1985-08-29 Sony Corp Switching device of television antenna
JPH055231B2 (en) * 1984-02-08 1993-01-21 Sony Corp
JP2002314469A (en) * 2001-04-17 2002-10-25 Uniden Corp Diversity antenna changeover device and method, and program

Also Published As

Publication number Publication date
JPS625387B2 (en) 1987-02-04

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