Broadband stacked microstrip antenna arrays

Abstract

It is well known that antenna arrays employing single layer microstrip patch radiating elements exhibit inherently narrow bandwidth. The aim of this paper is to investigate the impedance and gain bandwidth characteristics of microstrip antenna arrays with stacked parasitic elements. Two different 4 × 4 microstrip array configurations with stacked parasitic patches are studied both theoretically and experimentally at EHF range for LMCS application.