CPW to waveguide transition with tapered slotline probe

A new CPW to waveguide transition is developed based on the concept of tape red slot antenna and E-plane probe coupling. The transition consists of a t apered slotline probe and a slotline to CPW matching section. The current d esign has the advantages of broad bandwidth, compact size, low fabrication cost, and high reliability. The characteristics of a prototype transition a re investigated by numerical simulation on Duroid substrate and WR-90 waveg uide. The back-to-back combination is measured to verify the agreement with the simulated results and realization of this design.