Characterization of a Monopulse Antenna Made of Substrate-Integrated-Waveguide Structure

This work deals with the characterization of a monopulse antenna made of substrate-integrated-waveguide (SIW) structure. The proposed antenna featured by a tapered slot at the end of its groundplane is built on a 148 mm by 63 mm FR4-epoxy dielectric substrate. The use of SIW structure consisting of 129 vias in a 1 mm diameter and a 2 mm gap between each via combined with a tapered slot aims to produce a compact monopulse antenna which is operable at the frequency of 5.8 GHz and suitable for application in wireless communications. To verify the design results, experimental characterization through parameters measurement for the realized antenna prototype is performed. The measurement results demonstrate that the prototype can work at the frequency of 5.8 GHz with the gain of 1.58 dBi. In addition, the fractional bandwidth is around 13.8%, making this achievement suitable for the desired application.