Design analysis of a Tunable Tapered Metallic Baffle TM01 to TE11 HPM Mode Converter

Tapered metallic baffle mode converter for TM01 to TE11 mode has been presented. Using a triangular axially movable baffle, frequency tuning has been acheived. Conversion efficiency more than 98% at 2 GHz whereas more than 93% at 2.32 GHz, has been achieved and this enables to choose the mode converter frequency of operation accordingly. Mode converter RF beam stability has also been improved by adding a coaxial section at its output end. The proposed mode converter is an all metal structure, light in weight, higher in return loss, stable output beam and with frequency tunability feature; suitable for HPM system application.