A comprehensive study on circularly polarized antenna

The need and importance of circular polarization for wireless communication has been discussed in this paper. The circular polarization antenna has exceptional ability to alleviate the harmful influence caused by multipath effects and to provide insensitivity of signals towards transmitter and receiver antenna orientation. Polarization reconfiguration realizes frequency reuse and is meaningful in the era of frequency shortage and also enhances the channel capacity and security complication in wireless systems. This paper covers almost all the topology used to design a polarization reconfiguration antenna, with suitable design examples present in the literature.