Tri-Ridged Waveguide Orthomode Transducer

The design of a three-fold symmetry tri-ridged waveguide orthomode transducer is presented. This ridged waveguide setup enhances the single-mode bandwidth of the structure, ensuring that higher-order modes are not excited which in turn eliminates unwanted resonances when the component is used as a horn antenna feeding network. The simulated performance shows a return loss that is below - 20 dB across the entire 3:1 operating bandwidth.