2002•Journal of Electromagnetic Waves and ApplicationsRequires access

Application of Signal-Processing Techniques To Dipole Excitations in the Finite-Difference Time-Domain Method

U. Oguz, Levent Gürel

Abstract

The applications of discrete-time signal-processing techniques, such as windowing and filtering for the purpose of implementing accurate excitation schemes in the finite-difference time-domain (FDTD) method are demonstrated. The effects of smoothing windows of various lengths and digital lowpass filters of various bandwidths and characteristics are investigated on finite-source excitations of the FDTD computational domain. Both single-frequency sinusoidal signals and multifrequency arbitrary signals are considered.

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Key concepts: Finite-difference time-domain method, Smoothing, Signal processing, Finite difference method, SIGNAL (programming language), Computer science, Frequency domain, Time domain