Resonance Pulse Compression as an Effective Method for Generation of UWB High Repetitive Microwave Pulses

Abstract

A simplified version of the compressor operation is the storing of electromagnetic energy in a resonant cavity and the following rapid extraction of this energy to some kind of load. The attractive feature of resonant microwave compressors (RMC) is that the traveling-wave power in a common, single-mode, copper cavity with a double traveling time of 10-9 – 10-8 s per unit length of the cavity can exceed the power of an exciting generator by 10 – 20 dB and a multimode cavity by 20 – 30 dB or more.1 In superconducting cavities, the increase may achieve 50 – 60 dB and 60 – 70 dB, respectively. With the best existing technology, electrical field strengths in microwave elements or systems up to several hundreds of kV/cm can be achieved, and the corresponding traveling-wave power could be as much as 100 MW in single-mode copper cavities and 1 GW in multimode cavities. These levels of power will be followed by an output pulse power if one makes available an extraction time close to the double traveling time per unit length of a cavity. An increase of an extraction time will lead to a decrease of output pulse power. Therefore, short extraction times are the main objectives for elaboration of microwave compressors.