Rectangular substrate integrated waveguide with negligible losses for multiband applications

This paper reported a design of dielectric rectangular waveguide. It is profitable to transmit extremely high frequencies with insignificant losses. The dimensions of the waveguide are 3×2.3×0.015 cm³. The Polyimide of permittivity 3.5 is used as a substrate. The reflection loss is below -15 dB for C, X, Ku and K band frequencies. The return loss is -104.2102 dB and VSWR is 1. The proposed waveguide is of compact size and has multiband performance, insignificant loss and also high performance. It can be used in wireless communication systems.