Non-Reciprocal Coupling to Break the Time-Space Focusing of Time Reversed Electromagnetic Wave

摘要

In this paper, we numerically investigate the impact of nonreciprocal coupling on the focusing property of time reversed electromagnetic wave. We propose when there is a non-reciprocal coupling between the two antennas and the time-reversal mirror is far enough away from the two antennas, the time-reversed electromagnetic wave will have a focusing characteristic mainly at the non-source point. Numerical estimation confirm our conjecture. The characteristic is of great significance to secure communications.