A Wideband Cross-dipole Circularly Polarized Phased Array Antenna

A wideband cross-dipole circularly polarized phased array antenna is proposed. The phased array antenna can achieve a two-dimensional ±30° phase scanning ability with reflection coefficients below -10 dB at 27-32 GHz. The simulated results of a 5×5 antenna array show that the axial ratios at the main beam scanning range are all less than 4 dB within the 27-32 GHz band. The change of the gain in the scanning is smooth at the range of 18-20 dBic, and it achieves a good circularly polarized scanning characteristic. This proposed antenna can be applied in the field of millimeter wave communication, especially for satellite communication.