UltraWideband Microstrip to Waveguide Transition for 5G MillimeterWave Applications

In this paper, an ultrawideband microstrip to narrow wall waveguide transition operating at the E- Band is presented. The transition is based on exciting a microstrip folded dipole which radiates into the waveguide. The back-toback transition provides a fractional bandwidth (FBW) of 20% and measured insertion losses (IL) ranging from 0.65dB to 1.35dB in the whole band of operation.