Design of chamfered H-bend in rectangular substrate integrated waveguide for K-band applications

Abstract

This study concerns the designing and analysis of right-angled chamfered H-bend using rectangular substrate integrated waveguide technology. The proposed design combines the advantages of planer profile, such as high performance, low fabrication cost, easy integration with the low loss inherent to the waveguide solution. The waveguides get easily connected into any positions required, in miniature circuit by using proposed bend. The bend is optimized in K-band 18–26.5 GHz by HFSS code. Unlike others, this proposed bend is designed on modified epoxy substrate and the measured results demonstrate that the return loss is −44.89 dB and VSWR is 1.01 at the bandwidth of 23 GHz. Moreover, the return loss and VSWR remain below the value of −21 dB and 1.3, respectively, across the entire K-band. Thus, through the study of results, the optimal positions of metallic poles have been confirmed and the bend is very effective for signal transmission with low losses.