Study of Fabry-Perot cavities with metal mesh mirrors using equivalent circuit models, comparison with experimental results in the 60 GHz band

The equivalent circuit modelling technique is used to study the resonant fr equency and Q factor of plane parallel Fabry-Perot cavities with square ape rture metal mesh mirrors. Comparison of different models found in literatur e with experimental data in the 60 GHz band is given for thin and thick cav ities. Chen's model is shown to give a good agreement with measurements, as long as the cavity is not too selective and for large enough cavity.