Modeling of microwave ovens with perforated metal walls

Summary form only given, as follows. An applied technique is proposed for modeling of microwave ovens with perforated regions of metal walls. The technique relies on replacement of perforated segments by solid surfaces with identical electric conductivity obtained by FDTD simulation of a perforated sheet in a waveguide. The approach is used in modeling of a microwave oven with two perforated segments and shows their negligible impact on the frequency characteristics of |S11| so they can be replaced in the model by solid PEC sheets.