Dielectric-image line-fed millimeter-wave microstrip antenna arrays

Abstract

This paper presents the analysis and design of millimeter-wave aperture coupled microstrip antenna arrays fed by a dielectric image line (ACMADIL). A theory based on the cavity model of microstrip antenna and the change in modal voltage of image line at aperture was developed to analyze the single element aperture coupled microstrip patch antenna. It was then combined with the array theory to design linear traveling wave microstrip antenna arrays at Ka-band. Experiments show very good results for the arrays.