High-Gain Dual Circularly-Polarized Antenna with Wideband Feeding Structure

High gain antennas are mandatory components in modern communication and radar systems to increase the coverage area. In addition, circularly-polarized antennas have a better penetration capability, which ensures the adequate reception with the presence of obstacles between the transmitter and the receiver. In this article, an X-band high-gain circularly-polarized antenna design is proposed. The introduced antenna has a dual polarization to double the channel capacity through the utilization of polarization diversity. The proposed antenna consists of two horn antennas fed by a magic-tee followed by a ferrite based phase shifter. The presented configuration ensures both, high gain and high power handling capability. The proposed antenna system is centered at 9.5 GHz with a percentage bandwidth beyond 30%.