The circular polarized antenna is required in many application including wireless communication such as wireless local area network (WLAN), global positioning system (GPS), satellite systems, remote sensing system, RFID, and radar because of their stability in signal reception and smashing mobility.
Papers:
B. B. R. Rao, W. Kunysz, R. Fante, and K. Mcdonald, “GPS / GNSS Antennas ( GNSS Technology and Applications ),” Artech House, Norwood, MA, USA, 2012.
K. Agarwal, Nasimuddin, and A. Alphones, “Wideband Circularly Polarized Slot Antenna over Meta-Surface,” 42nd Eur. Microw. Conf., pp. 609–612, 2012.