scholarly journals An Efficient Reconfigurable RF-DC Converter With Wide Input Power Range for RF Energy Harvesting

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 79310-79318 ◽  
Author(s):  
Danial Khan ◽  
Seong Jin Oh ◽  
Khuram Shehzad ◽  
Muhammad Basim ◽  
Deeksha Verma ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Input Power ◽  
Rf Energy Harvesting ◽  
Rf Energy

scholarly journals A 2.77 μW Ambient RF Energy Harvesting Using DTMOS Cross-Coupled Rectifier on 65 nm SOTB and Wide Bandwidth System Design

Electronics ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1173
Author(s):  
Thuy-Linh Nguyen ◽  
Yasuo Sato ◽  
Koichiro Ishibashi
Keyword(s):  
Energy Harvesting ◽  
Orthogonal Frequency Division Multiplexing ◽  
Input Power ◽  
Potential Candidate ◽  
Wide Bandwidth ◽  
Rf Energy Harvesting ◽  
Ambient Environment ◽  
Rf Energy ◽  
Rf Signal ◽  
To Receive

This paper proposes a structure of the μ W RF energy harvesting (RFEH) system that is used for scavenging RF power from an ambient environment. A cross-coupled rectifier (CCR) with floating sub-circuit structures was utilized in the application of dynamic threshold MOSFET (DTMOS) on Silicon on Thin Buried Oxide (SOTB) to obtain high drain conductance of the MOSFET. A wide bandwidth matching between antenna and rectifier was designed to receive energy from the orthogonal frequency division multiplexing (OFDM) RF signal with a bandwidth of 15 MHz at 950 MHz band. Realistic measurements with a 950 MHz LTE mobile phone signal from the ambient environment indicate that an average DC output power of 2.77 μ W is harvested with the proposed RFEH system at a level of −19.4 dBm input power. The proposed RFEH system exhibits the best performance when compared to that of other realistic RFEH systems and is a potential candidate for battery-less Internet of Things (IoT) applications.

scholarly journals Simple Adaptive Rectifier with High Efficiency over a Range of 21 dBm Input Power for RF Energy Harvesting Applications

2021 ◽  
pp. 8-15
Author(s):  
Eman M. Abdelhady ◽  
◽  
Hala M. Abdelkader ◽  
Amr A. Al-Awamry
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Breakdown Voltage ◽  
Adaptive Design ◽  
High Efficiency ◽  
Power Level ◽  
Input Power ◽  
Rf Energy Harvesting ◽  
High Input Power ◽  
Rf Energy

This paper presents a novel simple adaptive and efficient rectifier for Radio Frequency (RF) energy harvesting applications. Traditional rectifiers have maximum RF-DC Power Conversion Efficiency (PCE) over a narrow range of RF input power due to diode breakdown voltage restrictions. The proposed adaptive design helps to extend the PCE over a wider range of RF input power at 2.45GHz using a simple design. Two alternative paths arecontrolled depending on the RF input power level. Low input power levels activate the first path connected to a single rectifier; low power levels make the diode operate below its breakdown voltage and therefore avoiding PCE degradation. High input power levels activate the second path dividing it into three rectifiers. This keeps input power at each rectifier at a low power level to avoid exceeding the diode break down voltage. Simulated PCE of this work is kept above 50% over a range of 21.4 dBm input power from -0.8dBm to 20.6dBm.

scholarly journals Effect of Parallel Capacitor in Matching Network of RF Energy Harvesting Circuit

2019 ◽  
Vol 7 (4) ◽  
pp. 19-24
Author(s):  
Pankaj Agrawal ◽  
Bharat Mishra ◽  
Akhilesh Tiwari
Keyword(s):  
Energy Harvesting ◽  
Conversion Efficiency ◽  
Output Voltage ◽  
Optimization Technique ◽  
Load Resistance ◽  
Input Power ◽  
Variable Load ◽  
Matching Network ◽  
Rf Energy Harvesting ◽  
Rf Energy

This paper is an outcome of a wide research on RF energy harvesting techniques presented so far along with the development and implementation of the new idea of using a matching network with and without including parallel capacitance. While working with variable signal power in RF energy harvesting there is always a problem with nonlinear behavior of rectifying diode in harvesting circuit, to overcome the same a variety of matching networks are proposed in this manuscript with the variable RF power along with the variable load. Simulation results shows that output has been achieved upto 1.8Volts with maximum power conversion efficiency up to 79% at -10 dBm input power. Experimental results represented DC output of 1.62 volts at a frequency of 900 MHz with -10 dBm input power. Optimization technique is used to select parameters value which maximizes output voltage and efficiency. Variation of load resistance and input power plays a major role in output voltage and conversion efficiency. Comparison of the same is also presented in this particular research paper.

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 Design and Analysis of a Modified TG Rectifier with Substrate Voltage Compensation Techniques at 45 nm Technology for High Frequency Low Power RF Energy Harvesting

2020 ◽  
Vol 11 ◽  
pp. 1-10
Author(s):  
Manash Pratim Sarma ◽  
Kandarpa Kumar Sarma
Keyword(s):  
Energy Harvesting ◽  
Wireless Network ◽  
High Frequency ◽  
High Speed ◽  
Wide Band ◽  
Input Power ◽  
Rf Energy Harvesting ◽  
Voltage Compensation ◽  
Major Bottleneck ◽  
Rf Energy

- The development of latest generation of wireless communication standards in the recent years has created enormous possibility to deploy high speed wireless network throughout the globe. There is always demand for high speed, seamless data connectivity. But it is a well-known fact that the increase in speed always makes the power consumption higher. Also while attempting to cater to the need of connectivity to a remote location, the major bottleneck is the availability of power. Hence incorporating self-sustainability to a wireless network is becoming the need of the hour. Radio frequency (RF) energy harvesting (EH) is gaining much attention in contemporary communications in this context. In the design of an EH system, the high frequency rectifier plays a significant role. Apart from several design hurdles that exist in a high frequency rectifier, to attain a high percentage conversion efficiency (PCE) at lower input power is the primary design challenge. This paper presents a design of a modified transmission gate (TG) based high frequency rectifier with two substrate voltage compensation techniques, viz. capacitor and MOS based compensation for RF EH system.The proposed capacitor and MOS based techniques enable the rectifier to achieve a PCE upto 86% and 92% at -5dBm respectively in its single stage implementation. This can be claimed to be the highest in-class efficiency as compared to recently published works. The frequency responses with both the techniques depict a wide band performance covering all popular wireless bands. The dynamic power dissipations (DPD) observed are 12nW and 16nW at -5dB, whereas the leakage power (LP) is 20x10-51W and zero respectively. Further such an performance are obtained using minimal number of transistors, viz. 4 and 5 respectively.

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