scholarly journals A DUAL-BAND RF ENERGY HARVESTING USING FREQUENCY LIMITED DUAL-BAND IMPEDANCE MATCHING

2013 ◽  
Vol 141 ◽  
pp. 443-461 ◽  
Author(s):  
Phirun Kim ◽  
Girdhari Chaudhary ◽  
Yongchae Jeong
Keyword(s):  
Energy Harvesting ◽  
Impedance Matching ◽  
Dual Band ◽  
Rf Energy Harvesting ◽  
Rf Energy

scholarly journals A Dual-Band Wide-Input-Range Adaptive CMOS RF–DC Converter for Ambient RF Energy Harvesting

Sensors ◽  
2021 ◽  
Vol 21 (22) ◽  
pp. 7483
Author(s):  
Bo-Ram Heo ◽  
Ickjin Kwon
Keyword(s):  
Energy Harvesting ◽  
Impedance Matching ◽  
Operation Mode ◽  
Input Power ◽  
Dual Band ◽  
Rf Energy Harvesting ◽  
Input Range ◽  
Rf Energy ◽  
Cmos Rf ◽  
Multi Band

In this paper, a dual-band wide-input-range adaptive radio frequency-to-direct current (RF–DC) converter operating in the 0.9 GHz and 2.4 GHz bands is proposed for ambient RF energy harvesting. The proposed dual-band RF–DC converter adopts a dual-band impedance-matching network to harvest RF energy from multiple frequency bands. To solve the problem consisting in the great degradation of the power conversion efficiency (PCE) of a multi-band rectifier according to the RF input power range because the available RF input power range is different according to the frequency band, the proposed dual-band RF rectifier adopts an adaptive configuration that changes the operation mode so that the number of stages is optimized. Since the optimum peak PCE can be obtained according to the RF input power, the PCE can be increased over a wide RF input power range of multiple bands. When dual-band RF input powers of 0.9 GHz and 2.4 GHz were applied, a peak PCE of 67.1% at an input power of −12 dBm and a peak PCE of 62.9% at an input power of −19 dBm were achieved. The input sensitivity to obtain an output voltage of 1 V was −17 dBm, and the RF input power range with a PCE greater than 20% was 21 dB. The proposed design achieved the highest peak PCE and the widest RF input power range compared with previously reported CMOS multi-band rectifiers.

scholarly journals A Dual-Band Rectifier for RF Energy Harvesting

2015 ◽  
Vol 19 (5) ◽  
pp. 189-197 ◽  
Author(s):  
Ekkaphol Khansalee ◽  
Kittipong Nuanyai ◽  
Yan Zhao
Keyword(s):  
Energy Harvesting ◽  
Dual Band ◽  
Rf Energy Harvesting ◽  
Rf Energy

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.

A dual band rectifying antenna for RF energy harvesting

2018 ◽  
Vol 17 (4) ◽  
pp. 1748-1755 ◽  
Author(s):  
Neeta Singh ◽  
Binod K. Kanaujia ◽  
Mirza Tariq Beg ◽  
Mainuddin ◽  
Sachin Kumar ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Dual Band ◽  
Rf Energy Harvesting ◽  
Rf Energy
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