Independent Beamscanning Reconfigurable Reflectarray Antenna With Different Phase Control Methods for Dual Polarizations

Dual-polarization reconfigurable reflectarrays (RRAs) typically employ identical phase control for both polarizations, limiting their ability to optimally address power and information transfer demands within a single aperture for the indoor simultaneous wireless information and power transfer (SWIPT) application. This paper proposes a dual-polarization RRA that enables independent beam scanning at orthogonal polarizations using different phase control methods. Derived from a standard guided-wave 1-bit element, a rectangular strip is added to form dual-resonance characteristics. The proposed element achieves over 360° continuous phase control from 5.85~5.95 GHz at x-polarization to avoid the quantization loss for power transfer, while providing 1-bit phase control from 7.1~7.3 GHz at y-polarization to reduce cost and power consumption for communication. A prototype with 10×10 elements is fabricated and experimented with. It can achieve 2-D beam scanning with a scan angle up to 50°. The measured aperture efficiency at the polarizations for power and information transfer is 49.9% and 23.7%, respectively. These well-rounded capabilities make this RRA a highly competitive solution for indoor SWIPT.