| 摘要 |
PROBLEM TO BE SOLVED: To control maximum transmission power constant without depending on a load of an antenna. SOLUTION: In this mobile terminal, a power amplifier 61 amplifies the power of a high frequency signal to a prescribed transmission power level and a coupler 62 outputs the power-amplified high frequency signal toward an antenna 31 via a first output terminal, branches a part of the high frequency signal and outputs branched signals via a second output terminal and a third output terminal, respectively. An RFIC 51 detects a first signal outputted by the coupler 62 via the second output terminal, and a detection circuit 65 detects a second signal outputted by the coupler 62 via the third output terminal. A control section 41 calculates an output voltage from the power amplifier 61 on the basis of a voltage value based on the first signal and a voltage value based on the second signal, and controls the power amplifier 61 so that the power of the high frequency signal may reach the prescribed transmission power level on the basis of the calculated output voltage. COPYRIGHT: (C)2011,JPO&INPIT
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