Vol. 96

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2019-11-05

Fast and Broad Band Calculation of the Dyadic Green's Function in the Rectangular Cavity; an Imaginary Wave Number Extraction Technique

By Mohammadreza Sanamzadeh and Leung Tsang
Progress In Electromagnetics Research C, Vol. 96, 243-258, 2019
doi:10.2528/PIERC19090301

Abstract

An analytical approach for calculation of the dyadic Green's functions inside the rectangular cavity over a broad range of frequency is presented. Both vector potential and electric field dyadic Green's functions are considered. The method is based on the extraction of the Green's function at an imaginary wave number from itself to obtain a rapidly convergent eigenfunction expansion of the dyadic Green's function. The extracted term encompasses the singularity of the Green's function and are computed using spatial expansions. Results are illustrated for rectangular cavity up to 5 wavelengths in size with thousand of cavity modes obtained by the 6th order convergent expansion. It is shown that for an accurate and broadband simulation, the proposed method is many times faster than the Ewald method.

Citation


Mohammadreza Sanamzadeh and Leung Tsang, "Fast and Broad Band Calculation of the Dyadic Green's Function in the Rectangular Cavity; an Imaginary Wave Number Extraction Technique," Progress In Electromagnetics Research C, Vol. 96, 243-258, 2019.
doi:10.2528/PIERC19090301
http://www.jpier.org/PIERC/pier.php?paper=19090301

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