Analysis and design of a circular TE01 mode transducer

An analysis and design procedure are presented for a mode transducer which converts the rectangular TE10 mode into the circular TE01 mode. The field analysis leads to an explicit evaluation of the transducer's s matrix. An experimental model has been designed using the procedure and the measured performance, 0-2 dB average insertion loss from 33 to 50 GHz, is a significant improvement upon previously reported designs.