The design of X-band non-constant serpentine TM/sub 01/-TE/sub 11/ mode converter with short length

In this paper, a non-constant serpentine TM/sub 01/ to TE/sub 11/ mode converter with short length for X-band high power microwave applications is presented. The mode converter is designed to operate at 10 GHz and utilize the structure of circular waveguide with an excessive curvature in order to convert efficiently between two modes. To achieve optimum design, the basic parameters are calculated by the approximation method proposed in this paper and optimized by the FIM simulator.