High-Efficiency Resonant Beam Charging and Communication

TL;DR

This paper proposes a high-efficiency resonant beam system for simultaneous wireless power transfer and data communication, utilizing semiconductor gain media and internal beam modulation to improve energy and spectral efficiency.

Contribution

It introduces a novel resonant beam scheme with semiconductor gain and internal modulation, achieving high power and data transfer efficiency for IoT applications.

Findings

16 W power output with 11% efficiency

Supports 18 bit/s/Hz spectral efficiency

Utilizes semiconductor gain and internal modulation

Abstract

With the development of Internet of Things (IoT), demands of power and data for IoT devices increase drastically. In order to resolve the supply-demand contradiction, simultaneous wireless information and power transfer (SWIPT) has been envisioned as an enabling technology by providing high-power energy transfer and high-rate data delivering concurrently. In this paper, we introduce a high-efficiency resonant beam (RB) charging and communication scheme. The scheme utilizes the semiconductor materials as gain medium, which has a better energy absorption capacity compared with the traditional solid-state one. Moreover, the telescope internal modulator (TIM) are adopted in the scheme which can concentrate beams to match the gain size, reducing the transmission loss. To evaluate the scheme SWIPT performance, we establish an analytical model and study the influence factors of its beam transmission, energy conversion, output power, and spectral efficiency. Numerical results shows that the proposed RB system can realize 16 W electric power output with 11 % end-to-end conversion efficiency, and support 18 bit/s/Hz spectral efficiency for communication.