A New Backscattering Dual-Polarized Rectenna for Wireless Power Transfer and IoT Applications

This paper proposes an innovative dual-polarized backscattering rectenna that operates in two distinct modes—energy harvesting and backscattering modulation—driven by two-bit digital signals. By utilizing two orthogonal (co- and cross-) polarizations, the design is an ideal and versatile candidate for IoT applications such as battery-free wireless sensing, identification, localization, and communication. The rectenna's dual functionality was validated through integration into a proof-of-concept, battery-free wireless sensor, serving as both an energy harvester and a dual-polarized backscatter modulator.