The determination of the relative permittivity of periodic stratified media based on the iterative time-reversal method  

作　　者：章志敏 王秉中 梁木生 纪晴 宋钢兵 

机构地区：[1]Institute of Applied Physics, University of Electronic Science and Technology of China [2]Smart Material and Structure Laboratory, Department of Mechanical Engineering, University of Houston

出　　处：《Chinese Physics B》2014年第4期694-699,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.61071031,61107018,and 61201089);the Research Fund for the Doctoral Program of Higher Education of China(Grant Nos.20100185110021 and 20120185130001);the Program for Changjiang Scholars and Innovation Team in University,China(Grant No.IRT1113);the Natural Science Foundation of the Higher Education Institutions of Anhui Province(Grant No.KJ2013Z287);Fundamental Research Fund for the Central Universities(Grant No.ZYGX2011YB018)

摘　　要：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 electro- magnetic 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.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 electro- magnetic 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.

关 键 词：iterative time reversal periodic stratified medium peak value detection relative permittivity determination 

分 类 号：O487[理学—固体物理]