Title :
Time-domain extrapolation to the far field based on FDTD calculations
Author :
Yee, Kane S. ; Ingham, David ; Shlager, Kurt
Author_Institution :
Lockheed Missiles & Space Co. Inc., Sunnyvale, CA, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
A scheme to extrapolate scattered fields calculated by the finite-difference time-domain (FDTD) method to the far zone is developed. It could replace the usual extrapolation scheme for a single frequency, in that it yields a spectrum with only one incident pulse. The method comprises the following steps: (1) using an incident pulse; (2) performing an FDTD calculation and using the currently calculated data on S to extrapolate to the far field; and (3) Fourier transforming the far-field time response to obtain the frequency-domain response. The approach seems to be more convenient in time-domain calculations and more in agreement with the spirit of FDTD
Keywords :
difference equations; electromagnetic wave scattering; extrapolation; radar cross-sections; time-domain analysis; FDTD calculations; Fourier transform; electromagnetic scattering; far field; finite-difference time-domain; frequency-domain response; incident pulse; radar cross section; scattered fields; time domain extrapolation; time response; Antennas and propagation; Bandwidth; Equations; Extrapolation; Finite difference methods; Magnetic analysis; Microstrip antennas; Microwave propagation; Resonance; Time domain analysis;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
