JPS6429130A - Transmission antenna sharing system - Google Patents
Transmission antenna sharing systemInfo
- 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
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.
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)
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 |
-
1987
- 1987-07-24 JP JP18513887A patent/JPS6429130A/en active Pending
Cited By (2)
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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