The Design of T-Septum Substrate Integrated Waveguide with an Ultra-Wideband Monomode

It is known that T-septum waveguide is better than the conventional ridged waveguide with respect to its cutoff frequency and bandwidth of the monomode guided. An improved structure called T-septum substrate integrated waveguide (TSSIW) has been proposed for integrating with planar microwave circuits more recently. Therefore, we propose a procedure for designing TSSIW with an ultra-wideband monomode theoretically, and its characteristics is further examined numerically.