E-Plane Right-Angle Broadband Transition of SIW to Rectangular Waveguide

In this work, a right angle broadband transition from substrate integrated waveguide to air-filled rectangular waveguide is proposed at the W-band. Two pairs of inductive posts and multi-section stepped waveguide impedance transformer are used to obtain the broader matching. HFSS simulation result of the transition shows a return loss less than - 10 dB and insertion loss is less than 0.5 dB over an impedance bandwidth is about 50.1%. This transition structure can provide a wider bandwidth and simple structure, which can be applied to more systems.