JPS55132137A - Multiplex radio repeater - Google Patents

Multiplex radio repeater

Info

Publication number
JPS55132137A
JPS55132137A JP3899379A JP3899379A JPS55132137A JP S55132137 A JPS55132137 A JP S55132137A JP 3899379 A JP3899379 A JP 3899379A JP 3899379 A JP3899379 A JP 3899379A JP S55132137 A JPS55132137 A JP S55132137A
Authority
JP
Japan
Prior art keywords
circulator
states
circulators
transmitters
receivers
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
JP3899379A
Other languages
Japanese (ja)
Inventor
Takuro Oguchi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3899379A priority Critical patent/JPS55132137A/en
Publication of JPS55132137A publication Critical patent/JPS55132137A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus

Abstract

PURPOSE:To improve the reliability of a route stand-by system while simplifying circuit constitution, by switching an in-use unit system to the stand-by unit system or vise verse by a circulator and switch. CONSTITUTION:Receivers RX11 and RX21 have switches which change input impedance from matching states with circulators CR13, 23 to mismatching states, and transmitters TX11, 21 have switches which change output impedance from matching states with circulators CR14, 24 to mismatching states. Since receivers RX11, 21, and transmitters TX11, 22 are normally mismatched with circulator CR 13, 23, and 14, 24, a signal of frequency f1 received by antenna ANT1 is applied to receiver RX11 via circulator CR13, and that of frequency f3 from transmitter TX11 to BPF12 via circulator CR14.
JP3899379A 1979-03-31 1979-03-31 Multiplex radio repeater Pending JPS55132137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3899379A JPS55132137A (en) 1979-03-31 1979-03-31 Multiplex radio repeater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3899379A JPS55132137A (en) 1979-03-31 1979-03-31 Multiplex radio repeater

Publications (1)

Publication Number Publication Date
JPS55132137A true JPS55132137A (en) 1980-10-14

Family

ID=12540650

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3899379A Pending JPS55132137A (en) 1979-03-31 1979-03-31 Multiplex radio repeater

Country Status (1)

Country Link
JP (1) JPS55132137A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS644126A (en) * 1987-06-03 1989-01-09 Gen Electric Failure permitting trunk radio repeating system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS644126A (en) * 1987-06-03 1989-01-09 Gen Electric Failure permitting trunk radio repeating system

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