Unified Wireless Power and Information Transfer Using a Diplexed Rectifier

Abstract

Despite the recent interest in Wireless Information and Power Transmission (WIPT) - in which information and energy flow together through the wireless medium - there remains key challenges for practical implementations. So far, it is assumed that it is not possible to perform Wireless Power Transfer (WPT) and Wireless Information Transmission (WIT) operations on the same received signal using one antenna. In this paper, we propose a receiver circuit implementation that extract both RF power and data from the same signal. The key to our implementation is the use of RF diplexers that implements frequency-domain multiplexing. The proposed sustainable unified receiver use low-power components and can hence be entirely powered by RF wave. We also establish a theoretical performance foundation for the proposed receiver by deriving achievable rate to serve as guideline for the optimization of energy-rate bi-objective function. The simulation results prove that the proposed sustainable unified architecture always out performs the existing low-complexity integrated receiver architecture.