A new wafer-level CPW to waveguide transition for millimeter-wave applications

A novel wafer-level coplanar waveguide (CPW) line to rectangular waveguide transition for millimeter-wave communication is presented in this paper. A metalized probe is adopted to couple the signal from the CPW to waveguide. Unlike the previous designs which are mostly based on capacitive coupling, the proposed CPW to waveguide transition is based on inductive coupling and offers the capability of monolithic fabrication of the transition on a wafer. Thus, the transition can be easily integrated with any micro-fabricated waveguide device and provides amenable option of having waveguide integration.