| Waveguide Coupler with Circular Apertures |
| T-junction Circular to Sidecoupled Waveguide |
| Cross-Aperture Waveguide Coupler |
| H-plane T-junction |
| Iris-Coupled Cavity Filter |
| Magic-T |
| Six-port Cross Junction |
| Rectangular to Cylindrical Waveguide Transducer |
| Two-path Cutoff Waveguide Dielectric Resonator Filter |
| Six-port Directional Coupler in Rectangular Waveguide |
| Orthomode Transducer (OMT) |
| Dual-mode Elliptical Filter |