Title :
Evaluation of time domain Green’s functions for layered medium using FAM and NMSP methods
Author :
Wu, Boping ; Tsang, Leung
Author_Institution :
Dept. of Electr. Eng., Univ. of Washington, Seattle, WA
Abstract :
Recently, there is increasing interest in transient analyses of electromagnetic problems using the time-domain integral equations (TDIE) method. In order to use the TDIE for the micro-strip problems, several methods have been made previously to evaluate the time-domain Greenpsilas functions for layered medium. The Cagniard-de Hooppsilas method [2] is restricted to non-dispersive media and also becomes less useful for multilayered media. Another method, based on the full-wave discrete complex images (FWDI) theory [3], only involves the quasidynamic terms of the Greenpsilas function and renders inaccurate results as the bandwidth of the transient signal increases. The half-space extraction method with fast Hankel transform (FHT) has the difficulty to maintain the accuracy at the large source-to-field distance [4].
Keywords :
Green´s function methods; electromagnetic wave propagation; fast Fourier transforms; integral equations; time-domain analysis; transient analysis; electromagnetic problems; fast Fourier transform; fast all modes method; full-wave discrete complex images; layered medium; numerical modified steepest-descent path method; time domain Green´s functions; time-domain integral equations; transient analyses; Equations; Frequency; Green´s function methods; Hydrogen; Magnetic materials; Optical surface waves; Surface waves; Taylor series; Tellurium; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2041-4
Electronic_ISBN :
978-1-4244-2042-1
DOI :
10.1109/APS.2008.4619431