Comparison of the FFT Conjugate Gradient Method and the Finite-Difference Time-Domain Method for the 2-D Absorption Problem
作者： D.T. Borup , D.M. Sullivan , O.P. Gandhi
DOI: 10.1109/TMTT.1987.1133660
关键词:
摘要: The need for high-resolution distributive dosimetry demands a numerical method capable of handling finely discretized, arbtrarily inhomogeneous models biological bodies. At present, two the most promising methods in terms efficiency are fast-Fourier-transform conjugate gradient (FFT-CGM) and finite-difference time-domain (FD-TD) method. In this paper, these compared with respect to their ability solve 2-D Iossy dielectric cylinder problem both TM TE incident polarizations. Substantial errors found FFT-CGM solutions case. source is explained modified developed which, although inefficient, alleviates illuminates difficulties encountered applying pulse-basis moments problems. contrast, FD-TD yield excellent This, coupled method, suggests that it superior
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