時域有限差分法在有耗介質電磁能量吸收問題中的應用
USE OF THE FINITE-DIFFERENCE TIME-DOMAIN METHOD FOR CALCULATING EM ABSORPTION IN LOSSY DIELECTRIC SCATTERER
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摘要: 本文論述了用時域有限差分法計算平面電磁波照射下有耗介質中電磁能量的吸收問題。討論了影響計算精度的各種因素。計算了均勻和分層均勻球體中能量的吸收和分布,并把計算結果與精確的解析分析進行了比較。還討論了理想導電面的模擬問題,并把結果與鏡象理論進行了對比。所有的結果都說明,在一定條件下,時域有限差分法能給出滿意的結果。Abstract: The problems for calculating EM energy absorption by lossy dielectric scatterer irradiated by plane wave are discussed. The factors effecting the accuracy of com-putation are discussed. The calculated resuhs of EM energy absorption and its distribution in homogeneous and layered homogeneous lossy dielectric spheres are presented, and the com-parison of these results with analytical soturion is given. The calculation is carried out for dielectric cylinder on conducting ground as well, and the result is compared with the image theory. All the computations show that the finite-difference time-domain method can give satisfactory results.
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D.M. Sullvan, O. P. Gandhi, A. Taflove, IEEE Trans, on BME, BME-35(1988), 179-286.[2]Chang-Qing Wang, O. P. Gandhi, IEEE Trans. on MTT, MTT-36(1989), 118-126.[3]K. S. Yee, IEEE Trans. on AP, AP-14(1966), 302-307.[4]G. Mur, IEEE Trans. on EMC, EMC-23(1991), 377-382.[5]王長清,無線電電子學匯刊,1988年,第1-2期,第38-48頁.[6]J. A. Stratton, Electromagnetic Theory, New York, McGraw-Hill, (1941).[7]J. R. Mautz, IEEE Trans. on MTT, MTT-26(1978), 375. -
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