Design of a Compact TM01-TE11 Mode Converter Using Periodic Iris Loading

A compact TM01-TE11 mode converter design is presented in this paper. The design consists of a periodic iris loaded semicircular waveguide section and exhibits maximum conversion efficiency of 99% at 3.5 GHz. Simulated and measured results are presented for comparison and the results are in good agreement with each other. The proposed converter has a symmetric, lightweight structure and very compact design (0.37*lambda) relative to earlier reported designs. The design has narrowband response and can handle up to 0.3 GW high power signal. The design is most suitable for moving platform and airborne high power microwave systems in defense applications.