STUDY TOWARDS ANTENNA DESIGN IN KA BAND USING HFSS

Abstract

This report presents a study on various configurations to achieve ultrawide bandwidth in Ka band (26 – 40 GHz). It includes Monopole antenna, Exponential Slot Edge Antipodal Vivaldi Antenna (ESE-AVA), with improved radiative features as compared to the conventional Antipodal Vivaldi Antenna (AVA) design. It extends the low-end bandwidth limitation, mitigates the side and back lobe levels, corrects squint effect, and increases its main lobe gain. In order to confirm those features, a comparative study among the two configurations of Vivaldi antenna, the low directivity conventional AVA and two popular modifications, regular slot edge (RSE) and the tapered slot edge (TSE) AVA is performed. By comparing it is observed that its notches in exponential shape, similar to open the main radiator, besides mitigating the SLL also directs the E-fields distributions towards the main lobe. It reflects into a main lobe gain improvement.