Circularly Polarized Swastik Shape Microstrip Antenna

Novel design of Swastik shape patch antenna is proposed for realizing circular polarized response. Two pairs of orthogonal rectangular slots, which realize swastika shape configuration, yield tuning in between the TM01 and TM10 mode frequencies of equivalent square patch that along with modified TM11 mode yields impedance and axial ratio bandwidth of 565 MHz (47.18%) and 43 MHz (4%), respectively. Proposed antenna yields broadside gain of above 6 dBi over most of the impedance bandwidth with peak gain close to 7 dBi. Proposed configuration with given bandwidth and gain characteristics can find applications in mobile base station communication antennas as well as in personal communication systems.