scholarly journals A Design of Ambient RF Energy Harvester with Sensitivity of −21 dBm and Power Efficiency of a 39.3% Using Internal Threshold Voltage Compensation

Energies ◽  
2018 ◽  
Vol 11 (5) ◽  
pp. 1258 ◽  
Author(s):  
Danial Khan ◽  
Hamed Abbasizadeh ◽  
Sang-Yun Kim ◽  
Zaffar Khan ◽  
Syed Shah ◽  
...  
Keyword(s):  
Threshold Voltage ◽  
Power Efficiency ◽  
Energy Harvester ◽  
Voltage Compensation ◽  
Rf Energy ◽  
Rf Energy Harvester

A CMOS RF Energy Harvester With 47% Peak Efficiency Using Internal Threshold Voltage Compensation

2019 ◽  
Vol 29 (6) ◽  
pp. 415-417 ◽  
Author(s):  
Danial Khan ◽  
Kang-Yoon Lee ◽  
Seong Jin Oh ◽  
Khuram Shehzad ◽  
Deeksha Verma ◽  
...  
Keyword(s):  
Threshold Voltage ◽  
Energy Harvester ◽  
Peak Efficiency ◽  
Voltage Compensation ◽  
Rf Energy ◽  
Cmos Rf ◽  
Rf Energy Harvester

scholarly journals A concurrent 915/2440 MHz RF energy harvester

2016 ◽  
Vol 8 (3) ◽  
pp. 405-413 ◽  
Author(s):  
Ludvine Fadel ◽  
Laurent Oyhenart ◽  
Romain Bergès ◽  
Valérie Vigneras ◽  
Thierry Taris
Keyword(s):  
Patch Antenna ◽  
Power Efficiency ◽  
Energy Harvester ◽  
Dipole Antenna ◽  
Dual Band ◽  
Far Field ◽  
Dc Voltage ◽  
Received Power ◽  
Rf Energy ◽  
Rf Energy Harvester

This paper presents the development of two dual-band radio-frequency (RF) harvesters optimized to convert far-field RF energy to DC voltage at very low received power. The first one is based on a patch antenna and the second on a dipole antenna. They are both implemented on a standard FR4 substrate with commercially off-the-shelf devices. The two RF harvesters provide a rectified voltage of 1 V for a combined power, respectively, of −19.5 dBm at 915 MHz, −25 dBm at 2.44 GHz, of −20 dBm at 915 MHz, and −15 dBm at 2.44 GHz. The remote powering of a clock consuming 1 V/5 µA is demonstrated, and the rectenna yields a power efficiency of 12%.

A Dual Band RF Energy Harvester with Hybrid Threshold Voltage Self-Compensation

2016 ◽  
Vol 25 (06) ◽  
pp. 1650055 ◽  
Author(s):  
Lianxi Liu ◽  
Wenzhi Yuan ◽  
Junchao Mu ◽  
Zhangming Zhu ◽  
Yintang Yang
Keyword(s):  
Threshold Voltage ◽  
Energy Harvester ◽  
Impedance Matching ◽  
Forward Bias ◽  
Input Power ◽  
Dual Band ◽  
Maximum Efficiency ◽  
Cmos Process ◽  
Rf Energy ◽  
Rf Energy Harvester

Threshold voltage self-compensation technology (TVSC) has been widely used in RF energy harvester. In this paper, the influence of the size of rectifying transistors, the stages and compensation orders of the rectifier, and the impedance matching network on the performance of RF energy harvester has been studied. A dual band RF energy harvester with hybrid threshold voltage self-compensation (HTVSC) is proposed in this paper in 65-nm CMOS process according to the distribution characteristic of the ambient RF energy. By combining TVSC and the technology of weak forward bias between the source and body of the rectifying transistor, the threshold voltage of MOSFET can be dramatically decreased. The performance of the RF energy harvester has been improved using this new technology. The simulation results show that the proposed dual band RF energy harvester can acquire energy at the band of 900[Formula: see text]MHz and 2.4[Formula: see text]GHz. At 900[Formula: see text]MHz-band (825–960[Formula: see text]MHz), with 1[Formula: see text]M[Formula: see text] load resistor, the output voltage of the energy harvester can be over 1.0[Formula: see text]V with a minimum [Formula: see text]18[Formula: see text]dBm RF input power and a maximum 13.8% power conversion efficiency (PCE). At 2.4[Formula: see text]GHz-band (2.4–2.485[Formula: see text]GHz), the minimum input power can be as low as [Formula: see text]19[Formula: see text]dBm with a maximum efficiency of 16.8%.

Design of Sub-Gigahertz Reconfigurable RF Energy Harvester From −22 to 4 dBm With 99.8% Peak MPPT Power Efficiency

2019 ◽  
Vol 54 (9) ◽  
pp. 2601-2613 ◽  
Author(s):  
Zizhen Zeng ◽  
Shanpu Shen ◽  
Xiaopeng Zhong ◽  
Xing Li ◽  
Chi-Ying Tsui ◽  
...  
Keyword(s):  
Power Efficiency ◽  
Energy Harvester ◽  
Rf Energy ◽  
Rf Energy Harvester
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