Matching network elimination in broadband rectennas for high-efficiency wireless power transfer and energy harvesting

Song, C ORCID: 0000-0001-8735-3156, Huang, Y ORCID: 0000-0001-7774-1024, Zhou, J ORCID: 0000-0001-5829-3932, Carter, P, Yuan, S, Xu, Q and Fei, Z (2017) Matching network elimination in broadband rectennas for high-efficiency wireless power transfer and energy harvesting IEEE Transactions on Industrial Electronics, 64 (5). pp. 3950-3961. ISSN 0278-0046, 1557-9948

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Abstract

Impedance matching networks for nonlinear devices such as amplifiers and rectifiers are normally very challenging to design, particularly for broadband and multiband devices. A novel design concept for a broadband high-efficiency rectenna without using matching networks is presented in this paper for the first time. An off-center-fed dipole antenna with relatively high input impedance over a wide frequency band is proposed. The antenna impedance can be tuned to the desired value and directly provides a complex conjugate match to the impedance of a rectifier. The received RF power by the antenna can be delivered to the rectifier efficiently without using impedance matching networks; thus, the proposed rectenna is of a simple structure, low cost, and compact size. In addition, the rectenna can work well under different operating conditions and using different types of rectifying diodes. A rectenna has been designed and made based on this concept. The measured results show that the rectenna is of high power conversion efficiency (more than 60%) in two wide bands, which are 0.9-1.1 and 1.8-2.5 GHz, for mobile, Wi-Fi, and ISM bands. Moreover, by using different diodes, the rectenna can maintain its wide bandwidth and high efficiency over a wide range of input power levels (from 0 to 23 dBm) and load values (from 200 to 2000 Ω). It is, therefore, suitable for high-efficiency wireless power transfer or energy harvesting applications. The proposed rectenna is general and simple in structure without the need for a matching network hence is of great significance for many applications.

Item Type:	Article
Uncontrolled Keywords:	Broadband rectennas, impedance matching networks, off-center-fed dipole (OCFD), wireless energy harvesting (WEH), wireless power transmission
Depositing User:	Symplectic Admin
Date Deposited:	28 Feb 2017 10:09
Last Modified:	22 Jan 2026 07:42
DOI:	10.1109/TIE.2016.2645505
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3005752
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• Matching Network Elimination in Broadband Rectennas for High-Efficiency Wireless Power Transfer and Energy Harvesting (deposited 06 Feb 2017 10:35)
  • Matching network elimination in broadband rectennas for high-efficiency wireless power transfer and energy harvesting (deposited 28 Feb 2017 10:09) [Currently Displayed]