Analysis of electromagnetic multi-scale structure and non-linear effects

The microstructures and the electrical contact property may affect the performance of the macro scale objects, and the passive intermodulation (PIM) problems cannot be directly calculated by frequency-domain methods. Firstly, the Floquet's theorem combined with the full-wave method was proposed to analyze the electrical performance of the multi-scale structure with periodic microstructures. Secondly, an equivalent circuit model of non-linear metallic junctions coupled with full-wave frequency domain method was adopted to analyze the PIM problems of multi-scale structure. The numerical results show that the method proposed can evaluate the influence of microstructure on the performance of macrostructure, and eliminate the accumulation of computational error appeared in the time domain method which is unacceptable in electrically large objects.