Design of an Ka-Band Multiple-beam Corrugated Waveguide TWT

Abstract

A Ka-band multiple-beam corrugated waveguide traveling wave tube amplifier is designed and analyzed in this paper. The TWT uses corrugated waveguide with 50 periods as slow-wave structure and three electron beams to interact with the microwave traveling through the SWS. Simulation shows that the output power is greater than 600W from 31GHz to 36.5GHz with beam current of 0.2A and Voltage of 13.1kV. The maximum gain and electron efficiency are about 26 dB and 9.53% respectively. Comparing with double corrugated waveguide TWT, the multiple-beam corrugated waveguide TWT has higher output power, gain and efficiency. The structure is also applicable for the miniaturization of power amplifiers.