scholarly journals A Quad-Band RF Circuit for Enhancement of Energy Harvesting

Electronics ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1160
Author(s):  
Kyrillos K. Selim ◽  
Shaochuan Wu ◽  
Demyana A. Saleeb ◽  
Sherif S. M. Ghoneim
Keyword(s):  
Energy Harvesting ◽  
Mobile Communications ◽  
Power Level ◽  
Elliptic Type ◽  
Frequency Bands ◽  
Voltage Multiplier ◽  
Radio Frequency Energy ◽  
Universal Mobile Telecommunications System ◽  
Conversion Efficiencies ◽  
Multiplier Circuit

Radio frequency energy harvesting is one of the new renewable sources that faces some technical challenges, which limit its performance. This study presents two scenarios to enhance the harvested power. The first scenario introduces a quad-band voltage multiplier circuit with a single receiving antenna and four band-pass filters of elliptic type. In this scenario, four frequencies of the Global System for Mobile communications, Universal Mobile Telecommunications System, and Wireless Fidelity frequency bands have been considered for the study. The second scenario proposes a quad-band voltage multiplier circuit with four receiving antennas at the same frequency bands as the first scenario. High conversion efficiencies were achieved for the two scenarios. The proposed quad-band system developed a harvested power level, sufficient for powering up low power micro-devices with no need for an external power supply.

A Multiband RF Energy Harvesting System for Efficient Power Conversion

2020 ◽  
Author(s):  
M. Shafiqur Rahman ◽  
Uttam K. Chakravarty
Keyword(s):  
Energy Harvesting ◽  
Impedance Matching ◽  
Power Conversion ◽  
Load Resistance ◽  
Mathematical Programming Problem ◽  
Rf Energy Harvesting ◽  
Voltage Multiplier ◽  
Overall Efficiency ◽  
Rf Energy ◽  
Multiplier Circuit

Abstract This paper presents a radio frequency (RF) energy harvesting (RFEH) system with a multiband antenna configuration that can simultaneously harvest energy from the sub-6 GHz and 5G millimeter-wave (mm-Wave) frequency bands. The performance of the RFEH system is studied from −25 dBm to 5 dBm input power levels underlying the maximization of the overall efficiency and possible optimization strategies. The maximum achievable power conversion efficiency (PCE) is formulated as a mathematical programming problem and solved by optimizing the design factors including antenna geometry, operational frequencies, rectifier topologies, and rectifier parameters. An array of broadband high gain patch antennas with reconfigurable rectifiers, an impedance matching network, and a voltage-multiplier circuit are employed in the system to maximize the PCE. The voltage standing wave ratio (VSWR) and reflection coefficient (S11) of the antenna are estimated and optimized by numerical method. Simulations are conducted to evaluate the performances of the rectenna and the voltage-multiplier circuit. Results for radiation pattern, wave absorption, input impedance, voltage, and power across the load resistance as a function of frequency are obtained for the optimized configuration. The overall efficiency of the optimized RFEH system is measured at various power inputs and load resistances.

Efficiency enhanced voltage multiplier circuit for RF energy harvesting

2016 ◽  
Vol 48 ◽  
pp. 95-102 ◽  
Author(s):  
Shailesh Singh Chouhan ◽  
Marko Nurmi ◽  
Kari Halonen
Keyword(s):  
Energy Harvesting ◽  
Rf Energy Harvesting ◽  
Voltage Multiplier ◽  
Rf Energy ◽  
Multiplier Circuit

Analysis of voltage multiplier circuit simulation for rain energy harvesting using circular piezoelectric

2018 ◽  
Vol 101 ◽  
pp. 211-218 ◽  
Author(s):  
Nik Ahmad Kamil Zainal Abidin ◽  
Norkharziana Mohd Nayan ◽  
Muhammad Mokhzaini Azizan ◽  
Azuwa Ali
Keyword(s):  
Energy Harvesting ◽  
Circuit Simulation ◽  
Voltage Multiplier ◽  
Multiplier Circuit

Dynamic modeling of a galloping structure equipped with piezoelectric wafers and energy harvesting

2019 ◽  
Vol 67 (3) ◽  
pp. 142-154 ◽  
Author(s):  
M. Y. Abdollahzadeh Jamalabadi ◽  
Moon K. Kwak
Keyword(s):  
Energy Harvesting ◽  
Cantilever Beam ◽  
Vibrational Energy ◽  
Virtual Work ◽  
Power Level ◽  
Closed Form Solutions ◽  
Multi Scale ◽  
Rigid Mass ◽  
Piezoelectric Wafer ◽  
Piezoelectric Wafers

This study presents the analytical solution and experimental investigation of the galloping energy harvesting from oscillating elastic cantilever beam with a rigid mass. A piezoelectric wafer was attached to galloping cantilever beam to harvest vibrational energy in electric charge form. Based on Euler-Bernoulli beam assumption and piezoelectric constitutive equation, kinetic energy and potential energy of system were obtained for the proposed structure. Virtual work by generated charge and galloping force applied onto the rigid mass was obtained based on Kirchhoff's law and quasistatic assumption. Nonlinear governing electro-mechanical equations were then obtained using Hamilton's principle. As the system vibrates by self-exciting force, the fundamental mode is the only one excited by galloping. Hence, multi-degreeof-freedom equation of motion is simplified to one-degree-of-freedom model. In this study, closed-form solutions for electro-mechanical equations were obtained by using multi-scale method. Using these solutions, we can predict galloping amplitude, voltage amplitude and harvested power level. Numerical and experimental results are presented and discrepancies between experimental and numerical results are fully discussed.

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