Time reversal of a high frequency signal based on time-varying guided wave system

A full-electronic method to realize time reversal of electromagnetic (EM) signal by using analog signal processing (ASP) technique is reported in this paper. A time-varying guided wave system, based on a transmission line with periodically loaded microwave switches, is described and discussed theoretically, analytically and experimentally. Examinations on a prototype demonstrator show that an amplitude-modulated pulse signal can be time reversed effectively, where the pulse has a time duration of 7 ns and the amplitude-modulated carrier is 3.5 GHz.