A High-Efficiency RFEH System With Feedback-Free Fast (F3) MPPT Over a Wide Input Range

IF 5.2 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems I: Regular Papers Pub Date : 2025-02-20 DOI:10.1109/TCSI.2025.3542823

Xufeng Liao;Yuxiang Zhang;Yukai Zhang;Shaohua Zhang;Zhangming Zhu;Lianxi Liu

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引用次数: 0

Abstract

This paper presents a high-efficiency, wide-input power range ambient Radio Frequency Energy Harvester (RFEH) system, which comprises an adaptive 4-mode impedance matching network (IMN), a single-stage cross-coupled differential-drive (CCDD) rectifier, a maximum power point tracking (MPPT) circuit, and a power manager unit (PMU). To adaptively configure the impedance matching network and modulate the T_ON of the buck-boost converter, a feedback-free fast (F³) MPPT technique based on the input power detection and parameters direct adjustment is proposed. It can effectively address the trade-off between the speed and accuracy in the impedance matching as well as in the maximum power transmission. Therefore, the power conversion efficiency (PCE) of the proposed RFEH system has been greatly improved. The power manager unit (PMU) is composed of a buck-boost converter, a self-supply unit, and a load regulator, which is employed to implement the F³ MPPT, startup, and self-powered of the RFEH system. The proposed design is fabricated in a 0.18-

$\mu $

m CMOS technology, and the chip area is about

$1.52\times 0.78$

mm². The measurement results demonstrate that the proposed RFEH system can operate in a wide P_IN range of −23 to 1 dBm with over 96% MPPT accuracy. It achieves PCE >20% in the P_IN range of −17 dBm to 1 dBm, with a peak PCE of 49.4% at P

$_{\mathrm {IN}}= -5$

dBm.

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宽输入范围无反馈快速（F3） MPPT的高效率RFEH系统

本文提出了一种高效、宽输入功率范围的环境射频能量采集器（RFEH）系统，该系统由自适应四模阻抗匹配网络（IMN）、单级交叉耦合差分驱动（CCDD）整流器、最大功率点跟踪（MPPT）电路和电源管理单元（PMU）组成。为了自适应配置阻抗匹配网络和调制降压-升压变换器的TON，提出了一种基于输入功率检测和参数直接调整的无反馈快速（F3） MPPT技术。它可以有效地解决阻抗匹配和最大功率传输中速度和精度之间的权衡问题。因此，所提出的RFEH系统的功率转换效率（PCE）得到了很大的提高。电源管理单元（PMU）由降压-升压转换器、自供电单元和负载调节器组成，实现RFEH系统的F3 MPPT、启动和自供电。本设计采用0.18- $\mu $ m CMOS工艺，芯片面积约为$1.52\ × 0.78$ mm2。测量结果表明，所提出的RFEH系统可以在−23 ~ 1 dBm的宽PIN范围内工作，并且MPPT精度超过96%。在- 17 dBm至1 dBm的PIN范围内，PCE为20%，在P $_{\ mathm {in}}= -5$ dBm时，峰值PCE为49.4%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Circuits and Systems I: Regular Papers 工程技术-工程：电子与电气

CiteScore

9.80

自引率

11.80%

发文量

441

审稿时长

2 months

期刊介绍： TCAS I publishes regular papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: - Circuits: Analog, Digital and Mixed Signal Circuits and Systems - Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic - Circuits and Systems, Power Electronics and Systems - Software for Analog-and-Logic Circuits and Systems - Control aspects of Circuits and Systems.