Design parameters of multiple reactive chokes for open ports in microwave heating systems

Abstract

Corrugated chokes provide one of most effective techniques to avoid leakage through open ports in microwave heating systems. The traditional analysis and design of these filters is based on monomode equivalent representations of the elements integrated in the structure. These representations usually lead to approximate responses, particularly with multiple corrugations, which recommend the use of multimode or more complete simulation techniques if highly accurate responses are desirable. Here, the effect of the designing parameters dimensions of these corrugated structures in the final response of the filter are analysed comparing the results given by a full-wave simulator with those provided by the approximate method. These effects as well as others, such as the effect of the material in the electrical specifications of the filters are discussed in this paper and design guidelines are recommended as a consequence of this study. © Springer-Verlag Berlin Heidelberg 2006.