JPS6429130A - Transmission antenna sharing system - Google Patents

Transmission antenna sharing system

Info

Publication number
JPS6429130A
JPS6429130A JP18513887A JP18513887A JPS6429130A JP S6429130 A JPS6429130 A JP S6429130A JP 18513887 A JP18513887 A JP 18513887A JP 18513887 A JP18513887 A JP 18513887A JP S6429130 A JPS6429130 A JP S6429130A
Authority
JP
Japan
Prior art keywords
frequency
pin diode
transmitter
branch
channel filter
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
JP18513887A
Other languages
Japanese (ja)
Inventor
Yoshio Ebine
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP18513887A priority Critical patent/JPS6429130A/en
Publication of JPS6429130A publication Critical patent/JPS6429130A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent disturbance in communication without causing the attraction of other transmission power even in case of the coincidence with the frequency of other transmitter by providing a pin diode control circuit when the resonance frequency of a channel filter changes following the frequency of the transmitter. CONSTITUTION:An output terminal of a channel filter is divided into two, one branch is connected to a branch circuit of a transmission antenna sharing system via a pin diode 7 and the other branch is connected to a terminator via a pin diode 6, a pin diode control circuit 12 an when the channel filter is changed to tune its resonance frequency to the frequency of the transmitter and both the frequencies are detuned, the pin diode 7 is forward-biased and the pin diode 6 is reverse-biased. Thus, the attraction of the power caused when the frequency is coincident with the frequency of the opposite transmitter is prevented.
JP18513887A 1987-07-24 1987-07-24 Transmission antenna sharing system Pending JPS6429130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18513887A JPS6429130A (en) 1987-07-24 1987-07-24 Transmission antenna sharing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18513887A JPS6429130A (en) 1987-07-24 1987-07-24 Transmission antenna sharing system

Publications (1)

Publication Number Publication Date
JPS6429130A true JPS6429130A (en) 1989-01-31

Family

ID=16165539

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18513887A Pending JPS6429130A (en) 1987-07-24 1987-07-24 Transmission antenna sharing system

Country Status (1)

Country Link
JP (1) JPS6429130A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1142145B1 (en) * 1998-12-22 2003-04-23 Telefonaktiebolaget L M Ericsson (Publ) An antenna switch module

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1142145B1 (en) * 1998-12-22 2003-04-23 Telefonaktiebolaget L M Ericsson (Publ) An antenna switch module
US6560444B1 (en) 1998-12-22 2003-05-06 Telefonaktiebolaget Lm Ericsson (Publ) Antenna switch module

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