Dual-Circularly Polarized Transmitarray Antenna with Differentiated Gain Levels

To address the problem of achieving differentiated energy levels for dual-circularly polarized transmitarray antennas, this article proposes a strategy to regulate the phase shifts and energy partitioning for dual-spin electromagnetic waves and demonstrate its use in actualization of a transmitarray antenna with fully-decoupled dual-CP beams. By modifying the geometrical dimensions of meta-atoms, simulated results show that differentiated gain levels are attained for the dual-spin channels, while the low axial ratios, low side-lobe-levels, well-defined pencil beams are fully preserved.