Patent ID: 7302351

Claim:
A power supply device that supplies a desired electric power to a connected load connected to an output terminal, comprising: an input signal measurer that measures a predetermined vector voltage relating related to an input signal before a measurement system error factor is generated; a reflected signal measurer that measures a predetermined vector voltage related to a reflected signal resulting from reflection of the input signal; a signal output acquisitioner that acquires a predetermined vector voltage related to the input signal from a power meter directly connected to the output terminal, after the measurement system error factor is generated; a measurement system error factor acquisitioner that acquires the measurement system error factor based on measurement results of said input signal measurer, said reflected signal measurer, and said signal output acquisitioner; a load measurer that measures a predetermined vector voltage related to the load based on the measurement system error factor, and the measurement results of said input signal measurer and said reflected signal measurer upon the load being connected; a target value decider that decides a target value of the predetermined vector voltage related to the input signal based on the measurement system error factor, the predetermined vector voltage related to the load, and the desired electric power; and an input signal level controller that controls a level of the input signal so that the predetermined vector voltage related to the input signal takes the target value.