Fig. 1. Section of metal ladder ridge

Fig. 2. Rectangular waveguide-to-coplanar waveguide conversion model. (a) Conversion structure diagram of the overall model; (b) Detail diagram of metal ridge of conversion structure; (c) Partial geometric parameters of metal ridges combined with coplanar waveguides

Fig. 3. The simulated transmission coefficient of the conversion structure at different first ridge height d1

Fig. 4. The simulated transmission coefficient of the conversion structure at different first ridge length L1

Fig. 5. The simulated transmission coefficient of the conversion structure at different step ridge thickness th

Fig. 6. Simulated S-parameters of the transformation structure

Fig. 7. Mode conversion of rectangular waveguide to coplanar waveguide at 305 GHz. (a) Electric field amplitude diagram; (b) Electric field vector diagram; (c) Magnetic field vector diagram

Fig. 8. Effect of machining error on transmission coefficient of conversion structure. (a) Circular chamfer r; (b) Spacing between the conversion structure and the coplanar waveguide s