One Octave Bandwidth Rectifier With a Frequency Selective Diode Array

• Published in: IEEE microwave and wireless components letters Vol. 28; no. 11; pp. 1008 - 1010
• Main Authors: Wu, Pengde, Huang, Shao Ying, Zhou, Wenshen, Liu, Changjun
• Format: Journal Article
• Language: English
• Published: IEEE 01.11.2018
• Subjects: Broadband communication; Broadband RF rectifier; Energy harvesting; energy harvesting (EH); frequency selection; high efficiency; Impedance matching; Microwave circuits; Rectifiers; Topology; Wireless power transfer; wireless power transfer (WPT)
• ISSN: 1531-1309; 1558-1764
• DOI: 10.1109/LMWC.2018.2869281

In this paper, a high-efficiency rectifier with one octave bandwidth is proposed by proposing a diode array with a frequency selective topology. With the frequency selective topology, the low-and high-band rectifiers are combined together without extra matching circuit at the input leading to a high-efficiency broadband design. For validation, a prototype rectifier was fabricated and characterized. The measured results show that the RF-dc power conversion efficiency (PCE) maintains above 70% from 1.75 to 3.55 GHz at an input power of 10 dBm. The measured PCE remains more than 50% within 1.4-3.7 GHz and the <inline-formula> <tex-math notation="LaTeX">|S_{\textrm {11}}| </tex-math></inline-formula> is lower than −10 dB from 1.7 to 3.6 GHz.