A novel power-combination method using a time-reversal pulse-compression technique

Abstract

The electromagnetic time reversal (TR) technique has the characteristics of spatiotemporal focusing in time reversal cavity (TRC), which can be used for pulse compression, thus forming the electromagnetic pulse with high peak power. The time-reversed pulse compression method in single channel has high pulse compression gain. However, the single channel pulse compression can only generate a limited gain. This paper proposes a novel TR power combination method in the multichannel TRC to obtain higher peak power based on the TR pulse compression theory. First, the TR power combination model is given, and the crosstalk properties of the associated channel and the influence of the reversal performance are studied. And then, the power combination performances for the TR pulse compression, such as combined signal to noise ratio (SNR) and combined compression gain, are analyzed by numerical simulation and experimental methods. The research results show that the proposed method has obvious advantages over the pulse compression method using the single channel cavity, and is more convenient for power combination.