A compact square microstrip antenna for circular polarization

A compact square microstrip antenna with four slits and a pair of truncated corner for circular polarization is proposed. Theoretical modal for an antenna is developed using modal cavity model and result are validated with MOM-based simulator and earlier reported experimental results. A good agreement between the simulated, theoretical model and measured results is obtained. The proposed antenna shows about 39% reduction in antenna size as compared with the conventional circular polarized antenna. Antenna shows consistent return loss and radiation pattern for entire frequency range. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:897–900, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26746