Resonant cavity assisted broadband CPW to rectangular waveguide transition on InP at 300 GHz

An in-plane resonant cavity-assisted coplanar waveguide (CPW) to rectangular waveguide (WG) transition is realized over an Indium Phosphide (InP) substrate with a thickness of 205 µm using a monopole radiating element. The simulated back-to-back (B2B) structure provides a bandwidth 16 GHz (288 - 304 GHz) with a return loss of 10 dB and insertion loss of 0.6 dB.