A study of the input impedance of the inset-fed rectangular microstrip antenna as a function of notch depth and width

A practical way to adjust the input impedance of a rectangular patch antenna is to vary the feed position. The inset-fed patch provides a method of impedance control with a planar feed configuration. The goal of this paper is to further study the inset-fed patch in order to examine the dependence of the input impedance on the inset notch geometry, as well as to realize design tables that show the notch depth to obtain the best input match (minimum |S/sub 11/|) for the inset patch when using a 50 /spl Omega/ feed.