Compact slot‐coupled microstrip antennas with circular polarization

Abstract

Abstract A compact circularly‐polarized (CP) design of a microstrip patch antennas is presented. The proposed antenna is fed by the coupling of a ring slot in the ground plane of a microstrip line. The results show that the required patch size of the proposed design at a fixed CP operating frequency has a reduction of 48%, as compared to a conventional CP microstrip antenna but, at the same time, its CP bandwidth is not decreased. Details of the simulated and experimental results are presented and discussed. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 57–59, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21080