Abstract
The authors proposed a suitable technique for the evaluation of complex permittivity in the pseudo-microwave range. Considerable improvements have been made in the accuracy of Q evaluation by the cavity perturbation method. The advanced method employed was five times as accurate as the conventional cursor function method, installed in network analyzers. The frequency dependence of complex permittivity for microwave dielectrics and low-temperature-fireable materials was also discussed. The results of frequency dependence measurements demonstrated that some characteristics of microwave dielectrics could not simply be determined by the Qf-constant rule. Therefore, development of an evaluation technique within the confines of the pseudo-microwave range was significant.
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