W-band SIW H-plane horn antenna development

In this paper, a 91 GHz H-plane horn antenna implemented by a substrate integrated waveguide (SIW) was designed and measured. The SIW horn antenna was fabricated on a standard 0.5-μm GaAs process and the substrate's thickness is 100 μm. Planar SIW horn design method with standard GaAs circuit design rule was adopted. The reflection coefficient and antenna gain were simulated by the FEM-based 3-D full-wave EM solver, Ansoft HFSS, and measured by an Agilent E8361C network analyzer and a Cascade 110 GHz probe station.