Interaction Impedance Measuring Method in Sine Waveguide

The sine waveguide has been proved to be a promising structure with excellent transmission characteristics. In this work, a formula measuring the interaction impedance for sine waveguide is given based on the non-resonant perturbation theory. The measuring results of diversion characteristic and interaction impedance are compared with the simulation results for a sine waveguide slow-wave structure operating in W-band and the differences between the two results are less than 3.5% and 11.2%.