Title :
A new time domain near field to far field transformation for FDTD in two dimensions
Author :
Feng Xu ; Wei Hong ; Xiaowei Zhu
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing, China
Abstract :
An algorithm of 2-D near field to far field transformation for the finite difference time-domain (FDTD) method is proposed in this paper. The transient far field response of a two-dimensional structure is obtained straightforwardly in the time domain without Fourier transformation. The abnormal integral for time in 2-D time domain Green function is transformed to a normal form by means of analytic method. Besides, by use of quantifying the positions of equivalent sources and arranging the time series, the calculations of the time integrals of equivalent sources are converted to the calculation of matrix-vector multiplying. A good agreement between both results has been observed.
Keywords :
Green´s function methods; electromagnetic fields; electromagnetic wave scattering; finite difference time-domain analysis; matrix multiplication; time series; transient response; FDTD; Green function; abnormal integral; analytic method; equivalent sources; matrix-vector multiplying; near field to far field transformation; time domain transformation; time integrals; time series; transient response; two-dimensional structure; Current; Finite difference methods; Green function; Integral equations; Matrix converters; Maxwell equations; Polynomials; Robustness; Time domain analysis; Two dimensional displays;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1012273
