A Hafnium Zirconium Oxide-Based Reconfigurable Reflectarray for THz Communications

This study presents the design and simulation of a reconfigurable reflectarray (RRA) utilizing a Hafnium Zirconium Oxide (HZO)-based varactor for terahertz (THz) communication systems. A unit cell analysis investigates the influence of varactor capacitance on reflection magnitude and phase variation, while full-wave simulations of a 10×10 reflectarray array validate its beam-scanning capabilities. The findings indicate that despite a limited phase tuning range and row-wise element control, the design achieves competitive gain performance due to its high aperture efficiency. This work establishes a foundation for advancing THz wireless communication systems using CMOS-compatible ferroelectric materials.