Broadband rectangular-to-ridge-To-T-septum waveguide transformers

Broadband transformers from rectangular to T-septum waveguides are presented. By utilizing both ridge and T-septum waveguide sections in the transformer design, the thicknesses of the ridge and the T-septa can be kept constant, which simplifies fabrication. The three- and four-section designs achieve relative bandwidths of 57% and 72%, respectively. Both designs are verified through computations with commercially available field solver software.