Fast and effective tuned coupling for mono-mode microwave power applicators

Abstract

A new concept for variation of coupling between a mono-mode applicator and a waveguide input is described. It provides a possibility for continuous tuning of the coupling factor, so that very good matching of the applicator is maintained while temperature modifies the loss factor of the heated material. The tuning is simple and much more convenient than a typical matching with a three-stub tuner. It is a very low-loss solution applicable also at very high power, even of the order of hundreds of kW.