JPS57188148A - Receiver provided with diversity antenna - Google Patents

Receiver provided with diversity antenna

Info

Publication number
JPS57188148A
JPS57188148A JP56073920A JP7392081A JPS57188148A JP S57188148 A JPS57188148 A JP S57188148A JP 56073920 A JP56073920 A JP 56073920A JP 7392081 A JP7392081 A JP 7392081A JP S57188148 A JPS57188148 A JP S57188148A
Authority
JP
Japan
Prior art keywords
level
turned
prescribed
flop
flip
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
JP56073920A
Other languages
Japanese (ja)
Other versions
JPS6034297B2 (en
Inventor
Kazuo Takayama
Tsukasa Senba
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.)
Denso Ten Ltd
Original Assignee
Denso Ten 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 Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP56073920A priority Critical patent/JPS6034297B2/en
Publication of JPS57188148A publication Critical patent/JPS57188148A/en
Publication of JPS6034297B2 publication Critical patent/JPS6034297B2/en
Expired 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
    • H04B7/0814—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 based on current reception conditions, e.g. switching to different antenna when signal level is below threshold
    • 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
    • H04B7/0831—Compensation of the diversity switching process for non-uniform properties or faulty operations of the switches used in the diversity switching process

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To prevent the generation of switching noise, by stopping the antenna switching functions when a reception input electric field strength is a prescribed level or lower. CONSTITUTION:When any of a reception level from antennas 6 and 9 is a prescribed value (H2) or lower, the level is higher than the output level V2 at a muting control terminal A and a transistor (TR)32 is conductive. Thus, a TR35 is conductive, and an output level from a set output terminal Q and a reset output terminal Q' of a flip-flop 24 is fluctuated in response to a pulse from an oscillation circuit 30. Thus, a positive pulse is introduced from diodes 39 and 40, a capacitor 41 is charged forward, and when this charging voltage is a prescribed level or more, a TR33 is turned off and the TR35 is also turned off, allowing to stop the operation of the flip-flop 24. Thus, either one antenna switching diodes 15 and 18 is turned on and the other is turned off.
JP56073920A 1981-05-16 1981-05-16 Receiver with diversity antenna Expired JPS6034297B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56073920A JPS6034297B2 (en) 1981-05-16 1981-05-16 Receiver with diversity antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56073920A JPS6034297B2 (en) 1981-05-16 1981-05-16 Receiver with diversity antenna

Publications (2)

Publication Number Publication Date
JPS57188148A true JPS57188148A (en) 1982-11-19
JPS6034297B2 JPS6034297B2 (en) 1985-08-08

Family

ID=13532069

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56073920A Expired JPS6034297B2 (en) 1981-05-16 1981-05-16 Receiver with diversity antenna

Country Status (1)

Country Link
JP (1) JPS6034297B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59154951U (en) * 1983-03-16 1984-10-17 株式会社ケンウッド antenna switching circuit
EP0517196A2 (en) * 1991-06-04 1992-12-09 Sony Corporation Space diversity receivers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59154951U (en) * 1983-03-16 1984-10-17 株式会社ケンウッド antenna switching circuit
EP0517196A2 (en) * 1991-06-04 1992-12-09 Sony Corporation Space diversity receivers
EP0918403A2 (en) * 1991-06-04 1999-05-26 Sony Corporation Space diversity receivers
EP0918403A3 (en) * 1991-06-04 1999-11-17 Sony Corporation Space diversity receivers

Also Published As

Publication number Publication date
JPS6034297B2 (en) 1985-08-08

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