| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna switching circuit for minimizing a transmission signal leaked to a reception terminal. SOLUTION: The antenna switching circuit is provided with: first and second strip lines SL1, SL2 placed between an antenna terminal Ant and a second reception terminal Rx2; a second switching diode D2 whose cathode is connected to a connecting point B between the first and second strip lines SL1, SL2 and to an anode of which a first reception terminal Rx1 and a second control terminal Vc2 are connected; a third switching diode D3 whose anode is connected to the connecting point B and whose cathode is connected to ground via a first capacitor C1 and connected to a second control terminal Vc2, and a fourth switching diode D4 whose anode is connected to a connecting point C between a second reception terminal Rx2 and the second strip line SL2 and whose cathode is connected to ground via a second capacitor C2. COPYRIGHT: (C)2004,JPO
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