Title :
Time-domain equivalent edge currents for transient scattering
Author :
Altintas, Ayhan ; Russer, Peter
Author_Institution :
Dept. of Electr. & Electron. Eng., Bilkent Univ., Ankara, Turkey
fDate :
4/1/2001 12:00:00 AM
Abstract :
Time-domain equivalent edge currents (TD-EEC) are developed for the transient scattering analysis. The development is based an the Fourier inversion of frequency domain equivalent edge current expressions. The time-domain diffracted fields are expressed in terms of a contour integral along the diffracting edges for any arbitrary input pulse shape, thereby yielding finite results at the caustics of diffracted rays. The approach also eliminates the need for the evaluation of a convolution integral in the time domain geometrical theory of diffraction (GTD) analysis. The results are compared with the first order GTD results for the transient scattering analysis for a circular disk
Keywords :
Fourier transforms; electric current; electromagnetic wave scattering; geometrical theory of diffraction; inverse problems; time-domain analysis; transient analysis; EM transient scattering analysis; Fourier transform inversion; GTD analysis; caustics; circular disk; contour integral; diffracted rays; diffracting edges; first order GTD; frequency domain equivalent edge current; geometrical theory of diffraction; input pulse shape; time-domain diffracted fields; time-domain equivalent edge currents; Convolution; Electromagnetic scattering; Electromagnetic transients; Frequency domain analysis; Optical pulses; Optical scattering; Physical optics; Physical theory of diffraction; Time domain analysis; Transient analysis;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
