Dual-Source Self-Start High-Efficiency Microscale Smart Energy Harvesting System for IoT

2018 ◽  
Vol 65 (1) ◽  
pp. 342-351 ◽  
Author(s):  
Mahmoud R. Elhebeary ◽  
Mahmoud A. A. Ibrahim ◽  
Mohamed M. Aboudina ◽  
Ahmed Nader Mohieldin
Keyword(s):  
Energy Harvesting ◽  
High Efficiency ◽  
Dual Source ◽  
Energy Harvesting System

scholarly journals High-efficiency D-TV energy harvesting system for low-input power

2016 ◽  
Vol 3 (1) ◽  
pp. 34-42 ◽  
Author(s):  
Tiago Moura ◽  
Nuno Borges de Carvalho ◽  
Pedro Pinho
Keyword(s):  
Energy Harvesting ◽  
High Efficiency ◽  
Field Measurements ◽  
Sine Wave ◽  
Input Power ◽  
Digital Television ◽  
Radio Frequency Energy ◽  
Television Signal ◽  
Voltage Doubler ◽  
Energy Harvesting System

In this work, a high-efficiency radio-frequency energy-harvesting system that takes use of the Portuguese Digital Television signal (750–758 MHz) to obtain DC power is proposed. To be useful, it is optimized to operate at low-power conditions. For the rectifier, three different solutions are presented: a single-series diode, a single-shunt diode, and a voltage-doubler configuration. The efficiency is similar for the three rectifiers – about 54% with a sine-wave excitation and −10.5 dBm of input power. Field measurements with the voltage-doubler have shown 63% efficiency for the same input power.

scholarly journals 3.3V DC output at -16dBm sensitivity and 77% PCE rectifier for RF energy harvesting

2019 ◽  
Vol 10 (3) ◽  
pp. 1398
Author(s):  
Astrie Nurasyeila Fifie Asli ◽  
Yan Chiew Wong
Keyword(s):  
Energy Harvesting ◽  
Power Efficiency ◽  
High Efficiency ◽  
Impedance Matching ◽  
High Sensitivity ◽  
Oxide Thickness ◽  
Process Technology ◽  
Rf Energy Harvesting ◽  
Energy Harvesting System ◽  
Rf Energy

<span>This paper presents a high voltage conversion at high sensitivity RF energy harvesting system for IoT applications. The harvesting system comprises bulk-to-source (BTMOS) differential-drive based rectifier to produce a high efficiency RF energy harvesting system. Low-pass upward impedance matching network is applied at the rectifier input to increase the sensitivity and output voltage. Dual-oxide-thickness transistors are used in the rectifier circuit to maintain the power efficiency at each stage of the rectifier. The system is designed using 0.18µm Silterra RF in deep n-well process technology and achieves 4.07V output at -16dBm sensitivity without the need of complex auxiliary control circuit and DC-DC charge-pump circuit. The system is targeted for urban environment.</span>

Smart Ultra Low Power Energy Harvesting System

2013 ◽  
Vol 4 (3) ◽  
pp. 102-118
Author(s):  
Alexandre L. Correia ◽  
José M. Catela ◽  
Moisés S. Piedade ◽  
Rui M. Rocha
Keyword(s):  
Energy Harvesting ◽  
Power Supply ◽  
High Efficiency ◽  
Energy Resources ◽  
Energy Sources ◽  
Ultra Low Power ◽  
Surrounding Environment ◽  
Energy Harvesting System ◽  
Reference Implementation ◽  
Novel Design

Small embedded systems operating in unattended conditions do need to be perpetually powered if a truly pervasive paradigm is envisaged. Harvesting energy from the surrounding environment seems to be the best option. For that, a set of systems has been proposed featuring interesting solutions but not yet capable of overcoming some issues like performance and flexibility. The authors propose a novel design for an environmental energy harvesting power supply that not only can work with multiple energy sources but also can extract the maximum possible energy from them. Additionally, it can provide important information concerning the energy resources of the system. Focusing particularly on the system’s design, the authors present results from a reference implementation that highlight the low wasted power and high efficiency characteristics of the system.

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