Novel circularly polarized loop coupled dipole antenna

This paper presents the design principle of a novel circularly polarized printed antenna having simple unobstructed layout and single feeding port. At the same time, the proposed antenna demonstrates good circular polarization performance. The design and optimization of two antenna prototypes have been carried out for RFID applications in 953 MHz frequency band. Both simulation and measurement data on VSWR, circular polarization AR, and antenna gain are presented.