Analysis of two-concentric annular ring microstrip antenna

Abstract

The analysis of a two-concentric annular ring patch antenna using planar waveguide model is presented. Consequently, various parameters such as input impedance (Zin), VSWR, return loss, resonance frequency, and radiation patterns have been theoretically investigated as a function of gap length and feed location. The various parameters of the two-concentric annular ring patch antenna are found to depend heavily on gap length and feed locations. The radiated power and 3-dB beamwidth improve significantly, as compared to a single radiator. © 2003 Wiley Periodicals, Inc. Microwave Opt. Technol. Lett.