Frequency performances of reflectarray element with varactor-loaded radial phasing line

Abstract

A simplified circuit-model approach is presented in this work to analyze the behavior of a novel broadband varactor loaded phasing line, specifically designed to improve the frequency performances of aperture-coupled reflectarray cell, and able to offer a useful degree of frequency agility. The proposed approach provides a simple but effective demonstration of the enhanced frequency performances of the adopted radial line geometry with respect to standard linear phasing line configurations.