Using time reversal technique to restore source image

Time reversal electromagnetic waves have time and space focusing properties. So we can use the properties for electromagnetic imaging. Here we report simulations for sub-wavelength focusing using time reversal technique to restore the source image. A kind of metal wire array has been used as an evanescent-wave channel, which could transmit the source image information. We employed time reversal EM waves to restore the source image at the same position and at a determined time.