Time Domain Analysis to Scattering Field of Large EMC Chamber

摘要

This paper presents a time domain analysis of finite difference time domain method (FDTD) on the scattering characteristic of a large chamber which has 36mx26mxl7m dimensions with the Fourier and wavelet transforms. In order to predict the time-frequency characteristics of the EMC chamber designed, a modified FDTD method including the lossy materials has been used to compute the scattering field of the chamber. Based on the mathematic transform techniques, a new FDTD formula has been obtained for the frequency dependent materials, the absorbers in chamber. With the computer code in this paper, the time domain characteristics of EMC chamber have been researched for the different excitation sources. The research in this paper would show the advantages of FDTD in electromagnetic field computation, especially in EMC problems.