A simplified design inline microstrip-to-waveguide transition

A simplified design of an inline transition between microstrip and rectangular waveguide is presented in this paper. The transition makes use of a dielectric filled rectangular waveguide (DFRW) as an intermediate step, which simplifies manufacturing and allows for an analytical design. The behavior of the transition has been experimentally validated in the W-band by means of a back-to-back configuration. Good performance has been achieved: a return loss greaterthan 10 dB and mean insertion loss lower than 1 dB.This research was funded by the Spanish Ministry of Economy and Competitiveness, grant number TEC2013-47753-C3-1-R and TEC2016-76997-C3-1-