High-Performance Multiband Ambient RF Energy Harvesting Front-End System for Sustainable IoT Applications—A Review

Abstract

The increasing demand for wireless Internet of Things (IoT) calls for power efficient RF energy harvesting approach. The current dominant single-band RF energy harvesting front-end system restricts itself to a single frequency, which is at the risk of ineffective operation when the harvesting frequency is unavailable. This paper reviews and explores the alternative approach of a multiband RF energyharvesting front-end system. It covers all essential circuitry of a multiband RF energy harvesting front-end system, starting from the recent RF surveys which investigate the typical, usable, and high-strength RF input, to the overview of the state-of-the-art antenna, impedance matching network (IMN), and RF-DC rectifier. The recent advancement of the multiple RF input harvesting abilities, reflection loss minimization, and performance improvement are comprehensively reviewed for different operating conditions, and this review also presents the advantages and disadvantages of the different circuit architecture combinations for multiband RF energy harvesting front-end systems. In summary, this review aims to fill the research gap in the further advancement of multiband RF energy harvesting towards enhancing its performance through optimal circuit integration of the front-end system.INDEX TERMS CMOS, power conversion efficiency (PCE), multiband RF energy harvesting, RF power transmission.

Semi-Passive UHF RFID Sensor Tags: A Comprehensive Review

“…Concerning power density of these solutions, unfortunately it could not be calculated as antenna dimensions are not provided, although these results of these works are within the SoA of RF harvesters [47] [48].…”

Transmit Power Control for Secure Wireless-Powered Sensor Networks With Malicious Energy Harvester

“…Here, we assume that the TN can verify the legitimacy of the RN through the association process and the only existing threat is eavesdropping from nearby HN nodes. 1 In the example illustrated in Fig. 1, we consider three TN-RN pairs and three HNs, indexed by i, j, and k. We assume that they are all equipped with a single antenna and operated in the same frequency band.…”

“…To mitigate this problem, wireless energy harvesting (WEH) technology has been applied to WSNs, and sensor nodes equipped with energyharvesting functionality can harvest energy from ambient radio frequency (RF) signals. In such wireless-powered sensor network (WPSN), various RF-based WEH techniques have been proposed [1]. Several studies have been conducted to optimize the performance of WPSNs considering the tradeoff between information decoding and energy harvesting (EH) [2].…”

“…Although previous studies have mainly concentrated on either WEH or PLS [1]- [5], a few recent studies have combined WEH and PLS to achieve secure wireless-powered communication networks [6]- [12]. In [6] and [7], wirelesspowered cooperative jamming strategies were proposed to verify the confidentiality of information in the presence of a potential eavesdropper.…”

A High-Efficiency, Ultrawide-Dynamic-Range Radio Frequency Energy Harvester Using Adaptive Reconfigurable Technique

“…However, due to the low energy density of RF energy itself, coupled with the energy attenuation and disparity of distribution caused by obstacles like mountains, buildings, etc., RFEH is faced with the problem of poor quality and inconsistency of the energy source, which puts high demands on the power conversion efficiency (PCE) and DR of the RFEH system. At the same time, these two points become the main challenges of RFEH [16,17].…”