Design and Analysis of a Metamaterial-Inspired Absorber for data rate in 52% RF-to-DC conversion Efficiency Dual-band SWIPT system

TL;DR

This paper introduces a metamaterial-inspired absorber that enhances data rate and efficiency in a dual-band SWIPT system through improved isolation and biological tissue compatibility.

Contribution

The study presents a novel metamaterial absorber design that significantly improves isolation and data rate in SWIPT systems operating through biological tissue.

Findings

Achieves 52% RF to DC conversion efficiency.

Improves isolation by 5dB at 9mm WPT distance.

Enables 7MB/s data rate with 5dBm weaker signals.

Abstract

This paper proposes a novel metamaterial-inspired absorber designed to enhance the data rate in 52% RF to DC conversion simultaneous wireless information and power transfer system (SWIPT) through biological tissue. The proposed absorber includes split-ring resonators(SRRs) and demonstrates significant permeability characteristics, with both the real and imaginary parts being negative and close to -1. It also improves isolation by around 5dB in a WPT distance of 9mm. A 5mm thick phantom is used for biological tissue in this study. Experimental results exhibits that the SWIPT systems including a rectifier that converts 52% RF to DC efficiency in a WPT distance of 9mm embedding this absorber between power and signal ports at Tx side results in a 5dB improvement in isolation performance. By using proposed absorber, it enables a 7MB/s improvement of data rate and allows signals to be transmitted with 5dBm weaker power than without absorber SWIPT system.