Non-Resonant Reflectarray using Stacked Striplines with Varying Propagation Path Lengths at 120 GHz

This paper introduces a different reflectarray design exploiting controlled propagation path lengths within the dielectric, providing broader phase variation and reduced reflection loss. The beamforming capabilities of the reflectarray consisting of the proposed structure is validated through demonstration of gain of approximately 30 dBi at the target reflection direction. Furthermore, error vector magnitude (EVM) measurement exhibits a significant improvement in received power and a reduced EVM of 2.73 %rms compared to a normal metal plate. The results indicate the effectiveness of the proposed reflectarray structure in sub-terahertz band applications, simplifying reflectarray implementation and enabling various applications as well as within the wireless communication field.