| 摘要 |
PROBLEM TO BE SOLVED: To reduce power consumption of a transmission side and also to minimize the deterioration of reception sensitivity. SOLUTION: A dielectric filter 11 is used at the transmission side, a SAW filter 12 is also used at a reception side, and a phase adjusting device 16 also adjusts interference of the reception side filter to the transmission side filter due to that these different types of filters are used. Thus, power loss of a transmission signal and the deterioration of reception sensitivity can be minimized. Namely, phase adjustment by the phase adjusting device 16 reduces the transmission power loss and makes the deterioration of the reception sensitivity small due to that only the SAW filter is used at the reception side.
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