Design of Circularly Polarized Filtering Transmitarray Antenna With Linearly Polarized Feed

A circularly polarized filtering transmitarray antenna (CPFTA) with a linearly polarized (LP) feed antenna is designed and implemented in this paper. An antenna-filter-antenna frequency selective surface (AFA FSS) has been designed and adopted as the transmitting layer of the proposed CPFTA. The designed AFA FSS has the multifunction of spatial filter, phase compensator and linearly polarized to circularly polarized (CP) wave converter. To verify the CPFTA design method, an antenna prototype whose center frequency of 30GHz has been exemplified with a LP horn feed antenna. Excellent simulated results of the proposed CPFTA have been observed.