A Beam-Steering Reflectarray Antenna with Arbitrary Linear-Polarization Reconfiguration

This work presents a beam-steering reflectarray antenna that achieves arbitrary linear polarization (LP) reconfiguration. This antenna employs a dual-circular polarization (CP) reconfigurable reflectarray and an LP feed horn to generate an LP beam. The incident LP wave is decomposed into two CP components, whose reflection phases are independently adjusted. By re-combining these reflected CP beams with different phase constants, arbitrary LP states can be synthesized. Experimental validation is performed using a 16$\times$16 1-bit reconfigurable reflectarray operating at Ku band, demonstrating reconfigurable LP states of LP(0$^\circ$), LP(45$^\circ$), LP(90$^\circ$) and LP(135$^\circ$), as well as dynamic beam scanning functionality from 0$^\circ$ to 60$^\circ$. This polarization-reconfigurable, beam-steering reflectarray has potential for applications in satellite and mobile communications, where both beam patterns and polarization alignment are crucial.