Title :
A numerical study of time-reversed UWB electromagnetic waves in continuous random media
Author :
Yavuz, Mehmet E. ; Teixeira, Fernando L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA
fDate :
6/27/1905 12:00:00 AM
Abstract :
We investigate superresolution effects on ultrawideband (UWB) electromagnetic waves (EM) produced by time-reversal (TR) arrays in continuous random media. The investigation is done via numerical simulations employing the finite-difference time-domain (FDTD) method. A Gaussian random background medium is considered. We compare the effect of statistical parameters, viz. variance, and correlation length, on the focusing resolution of transmitted waves by the TR array (TRA). The effect of depolarization is also briefly considered.
Keywords :
Gaussian processes; finite difference time-domain analysis; millimetre wave imaging; millimetre wave propagation; random media; FDTD; Gaussian random background medium; continuous random media; difference time-domain method; electromagnetic propagation; millimeter wave imaging; numerical study; supperresolution; time-reversed UWB electromagnetic waves; Acoustic scattering; Electromagnetic scattering; Finite difference methods; Numerical simulation; Permittivity; Random media; Remote sensing; Signal resolution; Time domain analysis; Ultra wideband technology; Electromagnetic propagation in random media; finite-difference time-domain (FDTD) methods; millimeter wave imaging; superresolution;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2005.844117
