High-power, microwave power combiner using a series-parallel array of diodes

Successful operation of a series-parallel array of varactor diodes used as a high-power, microwave source is reported. This power combiner used twelve varactor diodes in a flowing liquid-dielectric bath and delivered 100 watts CW at 57-percent efficiency when operating as a doubler from 0.5 to 1.0 GHz.