Numerical simulation and experiment validation for high frequent system of relativity traveling wave tube

Using the software high frequency structure simulator(HFSS) and Maxwell's equation by the finite integration algorithm(MAFIA), a disk-loaded waveguide of relativity traveling wave tube is simulated to get the dispersion characteristics. Based on this work, a broadband and a narrowband disk-loaded waveguide for the relativity traveling wave tube are designed. The “cold test” of the two waveguides is fulfilled, and the simulation results accord with measured values very well. It proves that both electromagnetic codes are capable of simulating eigenvalue problems of slow-wave structures of traveling wave tube.