Fig. 7 shows the measured PSK waveforms at symbol “0” and symbol “1”. The corresponding phase angles α1 and α2, output power Po, and system efficiency η are listed in Table II.The variations of α1 and α2 between symbol “0” and symbol “1” are 17° and 15°, respectively, which are sufficient for the signal detection. The disturbances on Po and η are −1.5 W and −1.7%, respectively, which are slightly larger than their theoretical values. The errors might come from the unideal tuning and the converter power losses.