Domain Decomposition Method Combining with FFT for Analysis of TEM Transmission Line

This paper presents domain decomposition method which is applied in the analysis of electromagnetic problems. The characteristic impedance of quasi TEM transmission lines are calculated by this method. The convergence property and computational efficiency of DDM are studied. The characteristic impedance of rectangular coaxial line is computed by fast Fourier transforms on divided several regular domain. The numerical results obtained show that DDM reduce both the computational complexity and computing time.