A low-loss CPW to dielectric waveguide transition for millimeter-wave hybrid integration

A transition from a coplanar waveguide (CPW) to a dielectric waveguide is investigated for the integration of active devices into dielectric waveguide structures. The transition consists of three parts: CPW to a slot line, the slot line to a dielectric waveguide, and a linear tapering part for matching the first and the last parts, respectively. The maximum of insertion loss is −1.7dB, and the return loss is less than −15dB over 7% bandwidth at 60GHz.