Abstract
Based on full-wave analysis method, the probability distribution curves of elec- tromagnetic (EM) flelds inside a single cavity with and without a mode stirrer are obtained, which obey a kind of unimodal functions. Although this unimodal function does not satisfy the assumption of power balance (PWB) method, the power losses of cavity wall at difierent frequencies evaluated by PWB method and those calculated by full-wave analysis method are comparable. The change trends of the power losses with frequency almost coincide with each other, and the difierence is no more than an order of magnitude. It is remarkable that PWB method costs less than one minute while full-wave analysis method costs more than two hours, and PWB method saves almost 70% memory space. It means that PWB method can indeed give efiective data that meet certain accuracy requirement with much smaller computational cost than full-wave analysis method. Finally, for further study of PWB method the inhomogeneous degree is deflned to measure the inhomogeneity of EM fleld distribution inside the cavity.
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