International Journal of Electrical and Computer Engineering (IJECE) Vol. 13, No. 3, June 2023, pp. 2419~2427 ISSN: 2088-8708, DOI: 10.11591/ijece.v13i3.pp2419-2427  2419 Journal homepage: http://ijece.iaescore.com High-efficiency 2.45 and 5.8 GHz dual-band rectifier design with modulated input signals and a wide input power range Sara El Mattar, Abdennaceur Baghdad Laboratory of Electronics, Energy, Automatics and Data Processing, Department of Electrical Engineering, Faculty of Sciences and Techniques of Mohammedia, Hassan II University, Casablanca, Morocco Article Info ABSTRACT Article history: Received Aug 10, 2022 Revised Sep 16, 2022 Accepted Dec 2, 2022 This paper presents a new rectifier design for radio frequency (RF) energy harvesting by adopting a particular circuit topology to achieve two objectives at the same time. First, work with modulated input signal sources instead of only continuous waveform (CW) signals. Second, operate with a wide input power range using the Wilkinson power divider (WPD) and two different rectifier diodes (HSMS2852 and SMS7630) instead of using active components. According to the comparison with dual-band rectifiers presented in the literature, the designed rectifier is a high-efficiency rectifier for wide RF power input ranges. A peak of 67.041% and 49.089% was reached for 2.45 and 5.8 GHz, respectively, for CW as the input signal. An efficiency of 72.325% and 45.935% is obtained with a 16 QAM modulated input signal for the operating frequencies, respectively, 69.979% and 54.579% for 8PSK. The results obtained demonstrate that energy recovery systems can use modulated signals. Therefore, the use of a modulated signal over a CW signal may have additional benefits. Keywords: Dual band Modulated signals Rectifier Wide input power range Wireless power transfer This is an open access article under the CC BY-SA license. Corresponding Author: Sara El Mattar Laboratory of Electronics, Energy, Automatics and Data Processing, Department of Electrical Engineering, Faculty of Sciences and Techniques of Mohammedia, Hassan II University Fst Mohammedia-Casablanca, Morocco Email: saraelmattar@gmail.com 1. INTRODUCTION A significant amount of radio frequency (RF) energy is released into space due to the trillions of radio transmitters, including RF devices and base stations that have popped up all over the world due to the fast growth of wireless communication technology. These transmitters represent a reliable source for energy collection. Future green communications will be possible and look promising if mobile and low-power devices can be charged using this wireless power transfer (WPT) technology. Numerous WPT methods have been presented with differences in operation and scope [1]. As an example, we have a magnetic resonance (MR) approach [2] that needs the resonance of two coils at the same frequency. It has a rather modest range. While the range of electromagnetic induction, the second approach, will be somewhat constrained. There is a third approach, called microwave power transmission (MPT), which is characterized by the use of a single-tone GHz-order RF signal [3]–[5]. Rectifiers are a crucial part of MPT because they transform RF power into direct current (DC) power. Numerous rectifiers with different configurations have appeared in publications [6]–[8]. The development of single-band [9]–[11], multiband [12]–[15], and broadband [16], [17] rectifiers has been made in response to the increasingly demanding energy requirements of wireless devices.