A Linearly-Polarized-Feed Dual-Circularly Polarized Dual-Beam Transmitarray With Independent Beam Control

A method for designing linearly-polarized-feed dual-circularly polarized dual-beam transmitarray (TA) is presented in this letter. According to a theory, a linearly polarized (LP) wave can be decomposed into left-handed and right-handed circularly polarized (LHCP and RHCP) waves. The LHCP and RHCP phase can be compensated independently and simultaneously by adjusting the initial and rotation phases of the element so that the LHCP and RHCP beams of the TA can appear simultaneously in space and can be controlled independently. The designed receiver-transmitter element is used to achieve the above functions, and the TA is fabricated and measured. Simulated results are consistent with experimental results.