Design Of Three-Section Traveling Wave Tube With Folded-Waveguide Circuit Shielded By Photonic Crystals

A Terahertz three-section Traveling Wave Tube with folded waveguide Shielded by Photonic Crystals was designed and optimized by CST simulation. The results show that when the working voltage is 13kV, the working current is 56mA, the input signal power is 5mW, the output power is 5.84W and the gain is higher than 30dB at the center operating frequency of 225GHz. Compared with the traditional folded waveguide slow wave structure with the same structural parameter size, the results show that the output power of the slow wave structure with photonic crystals is higher, the gain is bigger and the stability is better.