| 摘要 |
A transmission power control apparatus in a communication apparatus which synthesizes IF signals output from a plurality of channel units and emits the synthesized signal from an antenna. In the transmission power control apparatus, when none of channel units transmit an IF signal, a controller changes the connection of a power amplifier from the antenna over to a dummy antenna and supplies the output of the power amplifier to the dummy antenna, and instructs a predetermined number m of channel units to output IF signals, a reference voltage generator generates a reference voltage corresponding to a transmission wave number m, and a variable attenuator or a variable amplifier controls gain so that the difference between detected voltage corresponding to a transmission power and the reference voltage becomes zero.
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