A Multilayer Dielectric Filled Radial Substrate Integrated Waveguide Slot Antenna

Abstract

A narrow slot antenna is excited by designing a radial substrate integrated waveguide (R-SIW) having TE 10 mode. The length of the narrow slot antenna is increased to achieve wide impedance bandwidth and is found to be 10.61%, after simulation. In order to further increase the performance of the narrow slot antenna, in terms of gain and the shape of the principal E-plane radiation pattern; an engineered layer consisting of metal strips and EBG are constructed on top of the R-SIW. The simulated results for the realized gain and the principal radiation patterns are presented, and are compared with the presence and absence of an engineered layer. A peak realized gain of 11.5 dB at 30 GHz and impedance bandwidth of 10.5% are observed from frequency range 28.6 - 32 GHz, for the narrow slot antenna including the engineered layer.