JPS56144643A - Antenna common-use type transmitter and receiver - Google Patents

Antenna common-use type transmitter and receiver

Info

Publication number
JPS56144643A
JPS56144643A JP4813780A JP4813780A JPS56144643A JP S56144643 A JPS56144643 A JP S56144643A JP 4813780 A JP4813780 A JP 4813780A JP 4813780 A JP4813780 A JP 4813780A JP S56144643 A JPS56144643 A JP S56144643A
Authority
JP
Japan
Prior art keywords
receiver
hybrid
phase shifter
attenuation
output
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
JP4813780A
Other languages
Japanese (ja)
Inventor
Isao Ogata
Akira Nishimura
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 JP4813780A priority Critical patent/JPS56144643A/en
Publication of JPS56144643A publication Critical patent/JPS56144643A/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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)

Abstract

PURPOSE:To reduce the attenuation of a reception input attending upon an increase in the attenutation of a transmission output by branching and connecting the transmission output and reception input via hybrid couplers, respectively and by inserting a variable phase shifter into one connecting circuit. CONSTITUTION:The output of transmitter 34 is sent from hybrid coupler 37, using magic T, to circuits 32 and 33 and not sent to receiver 35. While variable phase shifter 38 is not in operation, hybrid coupler 36 outputs all signals from circuits 32 and 33 to antenna 31 and as phase shifter 38 makes a phase shift, the output proceeds from antenna 31 to terminating resistance 39. In reception, a received radio wave is branched by hybrid 36 and according to the phase shift of phase shifter 38, the received signal proceeds from transmitter 34 to receiver 35 through hybrid 37. Consequently, the attenuation of the reception input attending upon an increase in the attenuation of the transmission output is reduced without using a variable attenuator and circulator to facilitate the standardization and mass-production of devices.
JP4813780A 1980-04-14 1980-04-14 Antenna common-use type transmitter and receiver Pending JPS56144643A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4813780A JPS56144643A (en) 1980-04-14 1980-04-14 Antenna common-use type transmitter and receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4813780A JPS56144643A (en) 1980-04-14 1980-04-14 Antenna common-use type transmitter and receiver

Publications (1)

Publication Number Publication Date
JPS56144643A true JPS56144643A (en) 1981-11-11

Family

ID=12794944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4813780A Pending JPS56144643A (en) 1980-04-14 1980-04-14 Antenna common-use type transmitter and receiver

Country Status (1)

Country Link
JP (1) JPS56144643A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1992085A1 (en) * 2006-02-28 2008-11-19 KMW Inc. Apparatus for using a wireless communication base station in common

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1992085A1 (en) * 2006-02-28 2008-11-19 KMW Inc. Apparatus for using a wireless communication base station in common
EP1992085A4 (en) * 2006-02-28 2012-07-04 Kmw Inc Apparatus for using a wireless communication base station in common

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