As an example of our new approach to complex near-field (NF) scattering of electromagnetic waves,the timereversal (TR) transmission process on an NF current-element array is mapped to the statistical process on a kinetic Ising transmission chain.Equilibrium statistical mechanics and non-equilibrium Monte Carlo (MC) dynamics help us to find signal jamming,aging,annihilating,creating,and TR symmetry breaking on the chain with inevitable background noises;and these results are general in NF systems where complex electromagnetic scattering arises.
In this paper, we present a new method to determine the relative permittivity of periodic stratified media using the iterative time-reversal method. Based on transmission line theory, the focal peak value of iterative time-reversal electromagnetic waves, which contain information about the periodic stratified medium, is computed in pulse-echo mode. Using the relationship between the focal peak value and the relative permittivity of the periodic stratified medium, the relative permittivity can be obtained by measuring the focal peak value. Numerical simulations are conducted, and the results demonstrate the feasibility of the proposed approach to the measurement of the relative permittivity of a periodic stratified medium.
