Design of a Groove Gap Waveguide to Microstrip inline transition

In this paper the design of an inline transition between microstrip and groove gap waveguide operating at W-band is presented. The transition consists of two sections: a tapered microstrip line and a Chebyshev transformer. The simplicity of this design makes this transition appropriate for MMIC packaging at millimeter frequencies and above. Experimental validation has been carried out in the W-band. Good performance has been achieved: return loss better than 10 dB and mean insertion loss lower than 2 dB.