Temperature gradient sensor from pulsed power supply duty cycle in ultra‐low‐power energy harvesting system

2014 ◽  
Vol 50 (11) ◽  
pp. 826-828 ◽  
Author(s):  
R. Jove‐Casulleras ◽  
J. Ramos ◽  
H. Ccorimanya ◽  
A. Camps ◽  
E. Alarcon ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Temperature Gradient ◽  
Low Power ◽  
Duty Cycle ◽  
Power Supply ◽  
Pulsed Power ◽  
Ultra Low Power ◽  
Pulsed Power Supply ◽  
Energy Harvesting System

An Ultra-Low-Power Integrated RF Energy Harvesting System in 65-nm CMOS Process

2015 ◽  
Vol 35 (2) ◽  
pp. 421-441 ◽  
Author(s):  
Lian-xi Liu ◽  
Jun-chao Mu ◽  
Ning Ma ◽  
Wei Tu ◽  
Zhang-ming Zhu ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Cmos Process ◽  
Rf Energy Harvesting ◽  
Ultra Low Power ◽  
Energy Harvesting System ◽  
Rf Energy

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.

Design of an Energy Harvesting Rectenna for Low-Power Wireless Sensor

2014 ◽  
Vol 687-691 ◽  
pp. 3391-3394
Author(s):  
Lei Jun Xu ◽  
Chang Shuo Wang ◽  
Xue Bai
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Conversion Efficiency ◽  
Power Supply ◽  
Impedance Matching ◽  
Load Resistance ◽  
Input Power ◽  
Wireless Sensor ◽  
Measurement Results ◽  
Energy Harvesting System

This paper presents the design of a compact 2.45 GHz microstrip rectenna for wireless sensors’ power supply. In energy harvesting system, the ambient RF energy can be collected by the rectenna and converted to direct current, therefore, it can be applied to the power supply of low-power wireless sensor. Voltage doubling rectifier circuit and T-type microstrip impedance matching network are applied to this rectenna to increase the output voltage and the rectification efficiency. The antenna is fabricatied ​​by using double PCB board (FR4), and it is optimized by ADS to achieve the best performance. The measurement results show that the rectifier can reach the highest conversion efficiency of 78% when the load resistance is 320 Ω and the input power is 18 dBm. It also greatly improves rectenna’s conversion efficiency at lower input power when the input power is-20 dBm, which has great practical value for supplying low power consumption sensors.

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