Statistical characteristics of electromagnetic radiation for complex cavities based on random topology model

When the electromagnetic wave transports through apertures into the multi-port microwave chaotic cavities, random coupling mode for apertures is derived to predict the statistical characteristics of coupling voltage. A complex calculation method, aperture random topology model(ARTM), which combines random coupling model and electromagnetic topology theory, is proposed to determine the statistical characteristics of coupling voltage and transmission coefficient for interconnected cavities. This method is proved accurate through comparing results of ARTM and that of network cascaded theory. The results are beneficial for the analysis of the aperture coupling on complex irregular chaotic cavities as well as the research of reverberation chambers.