Increasing Peak Power of Short Pulse Source Based on Time Reversal Focusing Cavity

Abstract

Restricted by the limited performance of electronic devices, the high-power pulse source system based on the scheme of stretching and compressing a single pulse exhibits some limits in increasing the peak power of the pulse. Time reversal (TR) technology is an adaptive synchronous focusing technique, showing a powerful capability of enhancing the peak power of the pulse by focusing amounts of multipath pulses synchronously. Based on the TR technique, we discuss the use of some enclosed metal TR focusing cavity with built-in scatterers to increase the peak power of the short-time pulses and the possibility of breaking through the limitations of the conventional pulse power source. First, we present the underlying mechanisms of generating a high-power pulse source with the traditional pulse stretching and compressing scheme, the conventional TR method, and the 1-bit TR technique. After that, to achieve the highest peak power, we designed three TR focusing cavities of built-in scatterers and numerically compared their performances using the conventional TR technique and the 1-bit TR technique. The results show that the rectangular TR focusing cavity with a built-in oblique tangential scatterer together with the 1-bit TR technique exhibits the capability of generating the highest peak power pulses.