Approximate solution of the H plane right-angled corner in overmoded rectangular waveguide, operating in the H10 mode

A quasioptical theory has been developed to produce an approximate solution of an H plane right-angled corner in overmoded rectangular waveguide operating in the H10 mode. From this, the mode conversion in the forward and backward directions, the loss due to mode conversion, the reconversion effects and the frequency response, have been deduced. Measurements were made on two corners in waveguides of different sizes both operating at around 8.6mm. These show good agreement with the theory.