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Journal articles on the topic 'RF Energy Harvesting'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 June 2024

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1

Patel, Deep, Rohan Mehta, Rhythm Patwa, Sahil Thapar, and Shivani Chopra. "RF Energy Harvesting." International Journal of Engineering Trends and Technology 16, no. 8 (October 25, 2014): 382–85. http://dx.doi.org/10.14445/22315381/ijett-v16p276.

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2

Szut, Jakub, Paweł Piątek, and Mariusz Pauluk. "RF Energy Harvesting." Energies 17, no. 5 (March 3, 2024): 1204. http://dx.doi.org/10.3390/en17051204.

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This article presents research on the usefulness of three different electric circuit simulation environments for exploring energy harvesting from electromagnetic waves using energy harvesters. The software that is compared includes KiCad EDA, LT Spice and MATLAB Simscape Electrical.Too prepare a common background for the results comparison, crucial equations that combine RF transmission with energy are presented. Commercially available harvesters are also presented. An overview of the state-of-the-art research on this topic is summarised. In order to verify software using conditions that are similar to real ones, the power available at the 868 MHZ ISM band, which is close to the LTE bands used for telecommunications, is calculated. The results obtained using different software are close to being identical for all tested simulation environments.

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3

Bouchouicha, D., F. Dupont, M. Latrach, and L. Ventura. "Ambient RF Energy Harvesting." Renewable Energy and Power Quality Journal 1, no. 08 (April 2010): 1309–13. http://dx.doi.org/10.24084/repqj08.652.

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4

Popovic, Zoya, Sean Korhummel, Steven Dunbar, Robert Scheeler, Arseny Dolgov, Regan Zane, Erez Falkenstein, and Joseph Hagerty. "Scalable RF Energy Harvesting." IEEE Transactions on Microwave Theory and Techniques 62, no. 4 (April 2014): 1046–56. http://dx.doi.org/10.1109/tmtt.2014.2300840.

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5

S, Kumaravel, Mohamed Thufail H, Manoj Kumar R, Karunyamani V, and Mukesh Kumar M.K. "Energy Harvesting and Management from Ambient RF Radiation." SIJ Transactions on Computer Networks & Communication Engineering 05, no. 02 (April 18, 2017): 05–08. http://dx.doi.org/10.9756/sijcnce/v5i2/05010030101.

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6

Kwiatkowski, Eric, Jose Antonio Estrada, Ana Lopez-Yela, and Zoya Popovic. "Broadband RF Energy-Harvesting Arrays." Proceedings of the IEEE 110, no. 1 (January 2022): 74–88. http://dx.doi.org/10.1109/jproc.2021.3134658.

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7

Rengalakshmi, P., and R. Brinda. "Rectifier for RF Energy Harvesting." International Journal of Computer Applications 143, no. 10 (June 17, 2016): 14–17. http://dx.doi.org/10.5120/ijca2016910365.

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8

Oliveira, Daniela, and Rodolfo Oliveira. "Characterization of Energy Availability in RF Energy Harvesting Networks." Mathematical Problems in Engineering 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/7849175.

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The multiple nodes forming a Radio Frequency (RF) Energy Harvesting Network (RF-EHN) have the capability of converting received electromagnetic RF signals in energy that can be used to power a network device (the energy harvester). Traditionally the RF signals are provided by high power transmitters (e.g., base stations) operating in the neighborhood of the harvesters. Admitting that the transmitters are spatially distributed according to a spatial Poisson process, we start by characterizing the distribution of the RF power received by an energy harvester node. Considering Gamma shadowing and Rayleigh fading, we show that the received RF power can be approximated by the sum of multiple Gamma distributions with different scale and shape parameters. Using the distribution of the received RF power, we derive the probability of a node having enough energy to transmit a packet after a given amount of charging time. The RF power distribution and the probability of a harvester having enough energy to transmit a packet are validated through simulation. The numerical results obtained with the proposed analysis are close to the ones obtained through simulation, which confirms the accuracy of the proposed analysis.

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9

Guo, Jing, Dongkun Lu, and Weige Zheng. "Experimental Study on the Efficiency of RF Energy Transfer System." Journal of Physics: Conference Series 2221, no. 1 (May 1, 2022): 012039. http://dx.doi.org/10.1088/1742-6596/2221/1/012039.

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Abstract This paper presents a 915 MHz radio frequency (RF) wireless energy transfer system which contains RF energy transmitters and RF energy harvesting nodes. Firstly, Advanced Design System (ADS) is used to design and optimize the monopole voltage doubler rectifier circuit. Secondly, an energy harvesting node is designed by a commercial RF/DC rectifier and a 915 MHz antenna. Finally, the RF energy transfer experiment between RF energy transmitter and RF energy harvesting node is demonstrated. Experimental data fits well with theoretical analysis and the harvested energy show a non-linear relationship with the distance and angle between the receiving node antenna and the transmitter antenna. The experimental data is valuable for designing RF-powered nodes and optimizing the movement trajectory of the mobile RF energy transmitter, such as an unmanned aerial vehicle (UAV).

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10

Purohit, Nikhil, and Imaculate Rosaline. "Novel RF energy harvesting using Rectenna." Journal of Physics: Conference Series 2070, no. 1 (November 1, 2021): 012112. http://dx.doi.org/10.1088/1742-6596/2070/1/012112.

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Abstract In this paper an experimental RF energy harvester using rectifying antenna (rectenna) to harvest ambient energy from cellular device operating at 900 MHz GSM band is proposed. The circuit is a combination of antenna and rectifying circuit using Schottky barrier diode for microwave (RF) to DC conversion. The performance results of the rectenna shows radiation efficiency of around 58.81%, gain of 3.9 dB and directivity of 5.972 dBi. The proposed rectenna design can prove to be a low cost device for wireless power transmission and RF energy harvesting. The prototype is fabricated with simulated and measured results in good agreement, having a return loss of 21 dB at frequency of around 885 MHz. The overall efficiency is enhanced by using ISS351-TB-E Schottky diode which is categorized by a low junction capacitance and a low threshold voltage to achieve higher conversion efficiency.

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11

Srinivasan, Revathy. "RF Energy Harvesting for IOT Application." International Journal for Research in Applied Science and Engineering Technology 7, no. 5 (May 31, 2019): 2950–53. http://dx.doi.org/10.22214/ijraset.2019.5486.

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12

Schneider, J., M. Mrnka, J. Gamec, M. Gamcova, and Z. Raida. "Vivaldi Antenna for RF Energy Harvesting." Radioengineering 25, no. 4 (September 15, 2016): 666–71. http://dx.doi.org/10.13164/re.2016.0666.

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13

Heydari Nasab, Soudeh, Mohammad Asefi, Lutfi Albasha, and Naser Qaddoumi. "Investigation of RF Signal Energy Harvesting." Active and Passive Electronic Components 2010 (2010): 1–6. http://dx.doi.org/10.1155/2010/591640.

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The potential utilization of RF signals for DC power is experimentally investigated. The aim of the work is to investigate the levels of power that can be harvested from the air and processed to achieve levels of energy that are sufficient to charge up low-power electronic circuits. The work presented shows field measurements from two selected regions: an urbanized hence signal congested area and a less populated one. An RF harvesting system has been specifically designed, built, and shown to successfully pick up enough energy to power up circuits. The work concludes that while RF harvesting was successful under certain conditions, however, it required the support of other energy harvesting techniques to replace a battery. Efficiency considerations have, hence, placed emphasis on comparing the developed harvester to other systems.

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14

Bunin, Sergey, and Roman Zhogov. "SOME THOUGHTS ON RF ENERGY HARVESTING." Information and Telecommunication Sciences, no. 1 (November 3, 2016): 46–52. http://dx.doi.org/10.20535/2411-2976.12016.46-52.

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15

Bajpai, Garima, and Umesh Barandiya. "Design of RF Energy Harvesting Circuit for Low Power Devices." International Journal of Electrical and Electronics Research 4, no. 1 (March 31, 2016): 16–19. http://dx.doi.org/10.37391/ijeer.040104.

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Radio frequency (RF) energy transfer and harvesting techniques have recently become alternative methods to power the next generation wireless networks. The RF energy harvesting system was designed to convert the RF energy available in the atmosphere into useful electrical energy which can be used to charge a battery of capacity 50 uAh. This battery requires a voltage in the range of 4- 4.2V to get itself charged. In this paper we have designed and simulated a Radio Frequency (RF) energy harvesting circuit which utilized available RF energy with the voltage boosting circuit. Simulation results represents that by using matching network of high-Q, output voltage of harvesting circuit increases and it becomes more sensitive with respect to input signal frequency and value of elements used.

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16

Mukminin, Moch Khafid, and Nurhayati Nurhayati. "LITERATURE STUDY OF HARVESTING ENERGY WITH RESOURCES RADIO FREQUENCY." INAJEEE Indonesian Journal of Electrical and Eletronics Engineering 3, no. 2 (August 28, 2020): 48. http://dx.doi.org/10.26740/inajeee.v3n2.p48-55.

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Energy harvesting is the process of harvesting energy from external sources such as solar energy, heat, wind and electromagnetic waves / radio frequencies. dimension. Research on harvesting energy needs to be developed because the use of non-renewable energy is increasingly limited. The use of radio frequency (RF) as a source of energy for harvesting is an effort to create environmentally friendly energy. This is due to the growing use of telecommunications technology. Various studies have been conducted by harvesting RF from various telecommunication signals and broadcasting media (AM / FM, TV / DTV, GSM signals, Wi-Fi signals). The purpose of writing this article is to study literature on the use of harvesting energy, especially those originating from radio / RF frequencies. A simple harvesting energy harvesting system consists of an antenna and a voltage rectifier circuit. The antennas used for RF energy harvesting have different designs according to the type of signal captured, including using periodic log antennas, archimedean spiral antennas, patch antennas, dipole patch antennas and vivaldi antennas. The energy yield obtained from the energy harvesting process with radio frequency sources tends to be small in the milliwatt scale (1.17 µW / cm2 - 20VDC) depending on the type of antenna and radio frequency used (0.3 - 27.5 GHz) and can be applied to low power electronic devices.

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17

Sherazi, Hafiz Husnain Raza, Dimitrios Zorbas, and Brendan O’Flynn. "A Comprehensive Survey on RF Energy Harvesting: Applications and Performance Determinants." Sensors 22, no. 8 (April 13, 2022): 2990. http://dx.doi.org/10.3390/s22082990.

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There has been an explosion in research focused on Internet of Things (IoT) devices in recent years, with a broad range of use cases in different domains ranging from industrial automation to business analytics. Being battery-powered, these small devices are expected to last for extended periods (i.e., in some instances up to tens of years) to ensure network longevity and data streams with the required temporal and spatial granularity. It becomes even more critical when IoT devices are installed within a harsh environment where battery replacement/charging is both costly and labour intensive. Recent developments in the energy harvesting paradigm have significantly contributed towards mitigating this critical energy issue by incorporating the renewable energy potentially available within any environment in which a sensor network is deployed. Radio Frequency (RF) energy harvesting is one of the promising approaches being investigated in the research community to address this challenge, conducted by harvesting energy from the incident radio waves from both ambient and dedicated radio sources. A limited number of studies are available covering the state of the art related to specific research topics in this space, but there is a gap in the consolidation of domain knowledge associated with the factors influencing the performance of RF power harvesting systems. Moreover, a number of topics and research challenges affecting the performance of RF harvesting systems are still unreported, which deserve special attention. To this end, this article starts by providing an overview of the different application domains of RF power harvesting outlining their performance requirements and summarizing the RF power harvesting techniques with their associated power densities. It then comprehensively surveys the available literature on the horizons that affect the performance of RF energy harvesting, taking into account the evaluation metrics, power propagation models, rectenna architectures, and MAC protocols for RF energy harvesting. Finally, it summarizes the available literature associated with RF powered networks and highlights the limitations, challenges, and future research directions by synthesizing the research efforts in the field of RF energy harvesting to progress research in this area.

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18

Nimo, Antwi, Tobias Beckedahl, Thomas Ostertag, and Leonhard Reindl. "Analysis of Passive RF-DC Power Rectification and Harvesting Wireless RF Energy for Micro-watt Sensors." AIMS Energy 3, no. 2 (2015): 184–200. http://dx.doi.org/10.3934/energy.2015.2.184.

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19

Kim, Jun-Tae, Bo-Ram Heo, and Ickjin Kwon. "An Energy-Efficient UWB Transmitter with Wireless Injection Locking for RF Energy-Harvesting Sensors." Sensors 21, no. 4 (February 18, 2021): 1426. http://dx.doi.org/10.3390/s21041426.

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An ultralow-power ultrawideband (UWB) transmitter with an energy-efficient injection-locked radio frequency (RF) clock harvester that generates a carrier from an RF signal is proposed for RF energy-harvesting Internet-of-Things (IoT) sensor applications. The energy-efficient RF clock harvester based on the injection-locked ring oscillator (ILRO) is proposed to achieve optimal locking range and minimum input sensitivity to obtain an injection-locked 450 MHz clock in ultralow-power operation. A current-starved inverter-based delay stage is adopted that allows delay adjustment by bias voltage to minimize dynamic current consumption while maintaining a constant delay regardless of changes in process, supply voltage, and temperature (PVT). To minimize static current consumption, a UWB transmitter based on a digital-based UWB pulse generator and a pulse-driven switching drive amplifier is proposed. The proposed injection-locked RF clock harvester achieves the best RF input sensitivity of −34 dBm at a power consumption of 2.03 μW, enabling energy-efficient clock harvesting from low RF input power. In ultralow-power operation, a 23.8% locking range is achieved at the RF injection power of −15 dBm to cope with frequency changes due to PVT variations. The proposed UWB transmitter with RF clock harvester achieves the lowest energy consumption per pulse with an average power consumption of 97.03 μW and an energy consumption of 19.41 pJ/pulse, enabling operation with the energy available in RF energy-harvesting applications.

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20

Fatima, Farheen, M. Jaleel Akhtar, and Omar M. Ramahi. "Frequency Selective Surface Structures-Based RF Energy Harvesting Systems and Applications: FSS-Based RF Energy Harvesting Systems." IEEE Microwave Magazine 25, no. 3 (March 2024): 47–69. http://dx.doi.org/10.1109/mmm.2023.3340988.

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21

Kim, Teasung, Joohan Park, Jeehyeong Kim, Jaewon Noh, and Sunghyun Cho. "REACH: An Efficient MAC Protocol for RF Energy Harvesting in Wireless Sensor Network." Wireless Communications and Mobile Computing 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/6438726.

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This paper proposes a MAC protocol for Radio Frequency (RF) energy harvesting in Wireless Sensor Networks (WSN). In the conventional RF energy harvesting methods, an Energy Transmitter (ET) operates in a passive manner. An ET transmits RF energy signals only when a sensor with depleted energy sends a Request-for-Energy (RFE) message. Unlike the conventional methods, an ET in the proposed scheme can actively send RF energy signals without RFE messages. An ET determines the active energy signal transmission according to the consequence of the passive energy harvesting procedures. To transmit RF energy signals without request from sensors, the ET participates in a contention-based channel access procedure. Once the ET successfully acquires the channel, it sends RF energy signals on the acquired channel during Short Charging Time (SCT). The proposed scheme determines the length of SCT to minimize the interruption of data communication. We compare the performance of the proposed protocol with RF-MAC protocol by simulation. The simulation results show that the proposed protocol can increase the energy harvesting rate by 150% with 8% loss of network throughput compared to RF-MAC. In addition, the proposed protocol can increase the lifetime of WSN because of the active energy signal transmission method.

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22

Shobha A.S. , Dr. T. C. Manjunath. "Design and Development of RF Energy Harvesting Module for Low Power Device using Propulsion Concepts in Renewable Energy." Tuijin Jishu/Journal of Propulsion Technology 44, no. 3 (September 23, 2023): 891–98. http://dx.doi.org/10.52783/tjjpt.v44.i3.390.

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Energy harvesting is the need of the hour to operate small, portable and low power electronic devices for self-reliance. We focus our research on radio frequency energy harvesting. We have designed micro strip patch antenna to operate at 2.4GHz. We have analysed the capture of ambient radio frequency energy at various physical locations. We have successfully demonstrated the RF energy harvesting technique proposed for operating devices like LED, scientific calculator and battery charging. In this paper we have verified the RF energy harvesting technique through Hardware implementation.

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23

Chaari, Mohamed Zied, Rashid Al-Rahimi, and Otman Aghzout. "Energized IOT Sensor through RF Harvesting Energy." International Journal of Online and Biomedical Engineering (iJOE) 18, no. 09 (July 11, 2022): 4–28. http://dx.doi.org/10.3991/ijoe.v18i09.30839.

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Wireless Power Collecting (WPC) present the future in powering and energizing intelligent Internet of Things (IoT) electronics devices. This chapter studies and utilizes a circuit to powering wirelessly IoT devices. The WPC offer a best technique to help researchers and engineers of modern societies to build cell blocks. The concept is to energy any IoT devices and sensors wirelessly from Radio Frequency (RF) power strength in the same areas that may be hard to achieve or potentially hazardous. We implemented the RF harvesting technology with IoT devices to increase the efficiency of sensors. The idea of this system is to power up and self-energize any IoT sensors wirelessly. This work studies two different topologies of a rectangular patch antenna and different RF harvesting circuit voltage multiplier configurations using a microwave power station as the input RF source. This work aims to utilize the wireless power transmission technique in the smart house solution. The proposed prototype gets all technical parameters to generate enough electricity to power up the bulbs 5 W wirelessly at a gap distance around a five meters. Finally, we test the RF rectifier circuit coupled with a twin patch antenna that can self-energize the bulb, eventually devices work without batteries.

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24

Ali, Nabeel, and Sherif S. Hekal. "Rectenna Design for Radio Frequency Wireless Energy Harvesting." International Journal of Advances in Scientific Research and Engineering 08, no. 04 (2022): 91–96. http://dx.doi.org/10.31695/ijasre.2022.8.4.8.

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The concept of wireless power transmission (WPT) has been introduced for nearly a century. Some of the achievements made so far have made energy harvesting a reality, capable of providing alternative sources of energy. This paper provides a summary of RF energy harvesting techniques to serve as a guide for designing RF energy harvesting units. Since energy harvesting circuits are designed to operate at relatively small voltages and currents, they rely on the latest electrical technology for high efficiency. Thus, thorough analysis and discussions of the various designs and trade-offs between them are included. Also, we introduce most of the recent applications of radio frequency (RF) energy harvesting. Also in this work, a rectenna, which is a combination between an antenna and a rectifier, with the purpose of energy harvesting, is designed and verified through simulation. The rectenna consists of two main components: the first is a micro strip patch antenna and the second is a rectifying circuit. The micro strip antenna gather the wireless power, then the received RF power is rectified to DC using the rectifier. In this work, we will design and simulate the micro strip antenna using HFSS software, and the rectifier circuit using ADS software.

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25

Kanboz, Beyza, and Merih Palandoken. "UWB Microstrip Patch Antenna Design for Energy Harvesting Applications." International Journal of Advanced Natural Sciences and Engineering Researches 7, no. 4 (May 4, 2023): 115–18. http://dx.doi.org/10.59287/ijanser.565.

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RF energy harvesting systems, which are the receiver part of Wireless Power Transfer (WPT), have gained significant development in recent years. For maximum energy acquisition over a wide frequency range, such as to provide power to small handheld devices like cell phones, tablets, smart watches, and other smart devices, wideband and compact antennas are desired. RF systems are expected to cover different frequency bands, such as 2.4 GHz, 5.1 GHz, 5.8 GHz (Bluetooth/Wi-Fi), 2.3 GHz, 2.5 GHz, 3.5 GHz, 5 GHz (WiMAX), for energy harvesting. For such an RF harvesting system, the antenna is desired to have a wide bandwidth, good gain, and an omnidirectional radiation pattern. Energy harvesting devices refer to designs that integrate production and storage. For instance, radio frequency energy sources contain a large amount of electromagnetic energy in the environment, and with RF energy harvesting systems, a portion of this electromagnetic energy can be collected and converted into usable DC voltage. Microstrip patch antennas are very good alternatives for energy harvesting applications because they are cost-effective, compact in size and weight, flat in structure, and highly repeatable. This paper presents a microstrip patch antenna with a bandwidth of 3.9 GHz in the 3.4 to 7.3 GHz range for UWB applications. The antenna design has a gain value of 3.28dBi at the numerically calculated resonance frequency of 4.9 GHz and generally covers frequencies used for electronic device communication such as Wi-Fi 5 GHz and WiMAX. The proposed antenna design has gain values that are allowed to be used for RF energy harvesting applications.

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26

Magar, Harshada B., Pramod Sharma, Archana S. Ubale, Sandhya O. Ahire, and Vineeta Philip. "Resource Allocation Challenges and Strategies for RF-Energy Harvesting Networks Supporting QoS." International Journal on Recent and Innovation Trends in Computing and Communication 11, no. 7s (July 13, 2023): 184–94. http://dx.doi.org/10.17762/ijritcc.v11i7s.6990.

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This paper specifically addresses the resource allocation challenges encountered in wireless sensor networks that incorporate RF energy harvesting capabilities, commonly referred to as RF-energy harvesting networks (RF-EHNs). RF energy harvesting and transmission techniques bring substantial advantages for applications requiring Quality of Service (QoS) support, as they enable proactive replenishment of wireless devices. We commence by providing an overview of RF-EHNs, followed by an in-depth examination of the resource allocation challenges associated with this technology. In addition, we present a case study that focuses on the design of an efficient operating strategy for RF-EHN receivers. Our investigation highlights the critical aspects of service differentiation and QoS support, which have received limited attention in previous research. Besides, we explore previously unexplored areas within these domains.

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27

Fumtchum*, Achille, Pierre Tsafack, Emmanuel Tanyi, Florin Hutu, and Guillaume Villemaud. "A Survey of RF Energy Harvesting Circuits." Regular issue 10, no. 7 (May 30, 2021): 99–106. http://dx.doi.org/10.35940/ijitee.g8944.0510721.

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The aim of this work is, on one hand, to review the state of the art of the architectures and diodes used in radio-frequency energy harvesting systems, the idea here is to review the most recent works, as well as their characteristics, which include frequency, type of diode used, topology, maximum efficiency and corresponding power, and on the other hand to carry out simulations to determine the most appropriate case for any further work in the field. After having determined the most common topologies, we used the main known radio-frequency diodes to characterize them in a first step, clearly a process of comparing the results of the simulations of the different topologies is done by initially considering an identical frequency. and afterward determine the effect of frequency band on their conversion efficiency.

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28

u Reddy, D. Srinivasul. "RF Energy Harvesting for Low Power Devices." International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering 1, no. 1 (July 20, 2012): 77–82. http://dx.doi.org/10.15662/ijareeie.2012.0101015.

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29

Garcia-Moreno, Salatiel, Marco A. Gurrola-Navarro, Carlos A. Bonilla-Barragan, and Israel Mejia. "Design Method for RF Energy Harvesting Rectifiers." IEEE Transactions on Circuits and Systems II: Express Briefs 67, no. 11 (November 2020): 2727–31. http://dx.doi.org/10.1109/tcsii.2020.2964140.

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30

Arrawatia, Mahima, Maryam Shojaei Baghini, and Girish Kumar. "Differential Microstrip Antenna for RF Energy Harvesting." IEEE Transactions on Antennas and Propagation 63, no. 4 (April 2015): 1581–88. http://dx.doi.org/10.1109/tap.2015.2399939.

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31

Gaidhane, Vilas H., Arsheen Mir, and Vishal Goyal. "Energy harvesting from far field RF signals." International Journal of RF and Microwave Computer-Aided Engineering 29, no. 5 (November 15, 2018): e21612. http://dx.doi.org/10.1002/mmce.21612.

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32

Mishra, Bharat, Akhilesh Tiwari, and Pankaj Agrawal. "RF Energy Harvesting System for Wireless Sensor Devices: A Review." International Journal of Electrical and Electronics Research 5, no. 1 (March 31, 2017): 1–5. http://dx.doi.org/10.37391/ijeer.050101.

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In present era several companies and research groups are developing enhanced technologies which help to increase the operating lifetime of battery used in wireless sensor devices. Energy harvesting from ambient radio frequency becomes an attractive and trendy solution for energizing the devices of wireless sensor networks. Abundant availability of RF power from number of cell phone towers, Wi-Fi networks and DTH transmitters ensure that ample amount of power may be harvested from ISM band and after RF to DC conversion used in various low power applications. In this paper a thorough review on existing techniques of various RF power harvesting circuit comprised of different RF to DC converter and matching network with their characteristics and applications is presented. The possibility of harvesting circuit is also explored. Authors also discussed various design issues for developing the RF energy harvester.

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33

Seregin, P. S., O. I. Burmistrov, G. Solomakha, E. I. Kretov, N. A. Olekhno, and A. Slobozhanyuk. "Circularly polarized RF coil for energy harvesting in clinical MRI." Journal of Physics: Conference Series 2015, no. 1 (November 1, 2021): 012134. http://dx.doi.org/10.1088/1742-6596/2015/1/012134.

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Abstract Radiofrequency (RF) harvesting is a promising technology for the wireless power supply of various in-bore devices used in magnetic resonance imaging. However, current technical solutions in this area are based on the conversion of linearly polarized RF fields, and thus their efficiency is limited, as they interact only with a fraction of circularly polarized RF fields. In the present work, we introduce and experimentally realize a novel harvesting setup allowing for converting circularly polarized RF fields to direct current.

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34

Moon, Kwanyoung, Kyoung Min Kim, Yunmin Kim, and Tae-Jin Lee. "Device-Selective Energy Request in RF Energy-Harvesting Networks." IEEE Communications Letters 25, no. 5 (May 2021): 1716–19. http://dx.doi.org/10.1109/lcomm.2021.3053761.

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35

YAŞLI, Ahmet, and Sadık ÜLKER. "Microwave Energy Harvesting With No Extra Receiving Antenna." Afyon Kocatepe University Journal of Sciences and Engineering 23, no. 5 (October 27, 2023): 1197–205. http://dx.doi.org/10.35414/akufemubid.1206783.

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This paper addresses different cases of radio frequency harvesting using different antenna types as transmitting antenna but using just the lead of the capacitor as the wire antenna at the receiving end with a voltage rectifier circuit. Different antennas were used in the input and with two different rectification circuits the conversion efficiencies were studied accordingly. For a source of log periodic antenna, without any antenna, 27.31% RF-DC power conversion efficiency value was obtained at the far-field. For a source of half wavelength dipole antenna, at the near-field, 50.53% RF-DC power conversion efficiency value was obtained. For a source of helical antenna, up to 5 cm distance about 14.78% RF-DC power conversion efficiency was observed. For the Yagi-Uda antenna used as a source, RF-DC power conversion efficiency that was obtained at the far was 28.89% without any receiving antenna..

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36

Luo, Yu, Lina Pu, Guodong Wang, and Yanxiao Zhao. "RF Energy Harvesting Wireless Communications: RF Environment, Device Hardware and Practical Issues." Sensors 19, no. 13 (July 8, 2019): 3010. http://dx.doi.org/10.3390/s19133010.

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Radio frequency (RF) based wireless power transfer provides an attractive solution to extend the lifetime of power-constrained wireless sensor networks. Through harvesting RF energy from surrounding environments or dedicated energy sources, low-power wireless devices can be self-sustaining and environment-friendly. These features make the RF energy harvesting wireless communication (RF-EHWC) technique attractive to a wide range of applications. The objective of this article is to investigate the latest research activities on the practical RF-EHWC design. The distribution of RF energy in the real environment, the hardware design of RF-EHWC devices and the practical issues in the implementation of RF-EHWC networks are discussed. At the end of this article, we introduce several interesting applications that exploit the RF-EHWC technology to provide smart healthcare services for animals, wirelessly charge the wearable devices, and implement 5G-assisted RF-EHWC.

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Liu, Wenbo, Kama Huang, Tao Wang, Zhuoyue Zhang, and Jing Hou. "A Broadband High-Efficiency RF Rectifier for Ambient RF Energy Harvesting." IEEE Microwave and Wireless Components Letters 30, no. 12 (December 2020): 1185–88. http://dx.doi.org/10.1109/lmwc.2020.3028607.

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K.Selvakumar and M. Senthil Kumar. "AMBIENT RF SIGNAL AND HEAT RADIATION ENERGY HARVESTING AND MANAGEMENT." EDXJL International Journal on Innovations and Advanced Research 01, no. 01 (2023): 15–21. http://dx.doi.org/10.59599/edxjl-ijiar.2022.1103.

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The study is about using an RF source to capture energy. The matching circuit is used to transfer the power from the antenna to this location. So that more power can be obtained from the tower, the rectifier circuit converts the incoming RF signal to a DC signal that is supplied into the battery, and efficient rectification boosts the output power. Wind, solar, vibration, heat, and radio frequency (RF) energy harvesting are developing as attractive alternatives to traditional energy resources. Energy harvesting is the method of electronically catching RF signals and heat radiation from a mobile phone, storing the energy in a battery, and using it as needed.

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R, Saravanakumar, Lavanya K, Pavithra B, Punithavalli B, and Revathi P. "A Wide Input Range Dual Path CMOS Rectifier for RF Energy Harvesting." SIJ Transactions on Computer Networks & Communication Engineering 05, no. 01 (February 20, 2017): 05–08. http://dx.doi.org/10.9756/sijcnce/v5i1/05010090101.

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A. Rahim, Mohamad Kamal, Bashar A. F. Esmail, Nur Syahirah M. Yaziz, Noor Asmawati Samsuri, Noor Asniza Murad, Osman Ayop, Farid Zubir, Huda A. Majid, and Norsaidah Muhamad Nadzir. "Flexible Rectenna for Energy Harvesting System." ELEKTRIKA- Journal of Electrical Engineering 21, no. 1 (April 20, 2022): 73–77. http://dx.doi.org/10.11113/elektrika.v21n1.375.

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This paper presents a flexible rectenna for RF energy harvesting application. The textile wideband antenna is designed using CST software. The Fleece and Shieldit fabrics are used as substrate and conductive material, respectively. The antenna is fabricated and its measurement performances are described in terms of reflection coefficient and the radiation pattern is measured. Then, the rectifier circuit is designed and simulated using ADS software and the integration between antenna and rectifier (rectenna) is achieved using the same software. The flexible rectenna is experimentally verified at different distances from the RF source. The highest measured DC output voltage is 35 mV at a distance of 0.5 m. The system harvests DC output voltage successfully even though it only produces a small value. This system can be improved more and used for obtaining continuous energy for future wearable applications.

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A. Rahim, Mohamad Kamal, Bashar A. F. Esmail, Nur Syahirah M. Yaziz, Noor Asmawati Samsuri, Noor Asniza Murad, Osman Ayop, Farid Zubir, Huda A. Majid, and Norsaidah Muhamad Nadzir. "Flexible Rectenna for Energy Harvesting System." ELEKTRIKA- Journal of Electrical Engineering 21, no. 1 (April 20, 2022): 73–77. http://dx.doi.org/10.11113/elektrika.v21n1.375.

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This paper presents a flexible rectenna for RF energy harvesting application. The textile wideband antenna is designed using CST software. The Fleece and Shieldit fabrics are used as substrate and conductive material, respectively. The antenna is fabricated and its measurement performances are described in terms of reflection coefficient and the radiation pattern is measured. Then, the rectifier circuit is designed and simulated using ADS software and the integration between antenna and rectifier (rectenna) is achieved using the same software. The flexible rectenna is experimentally verified at different distances from the RF source. The highest measured DC output voltage is 35 mV at a distance of 0.5 m. The system harvests DC output voltage successfully even though it only produces a small value. This system can be improved more and used for obtaining continuous energy for future wearable applications.

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Zhou, Yuwei, Bruno Froppier, and Tchanguiz Razban. "Radiofrequency ambient level energy harvesting." Wireless Power Transfer 2, no. 2 (September 2015): 121–26. http://dx.doi.org/10.1017/wpt.2015.8.

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This paper presents a study of Schottky diode rectenna (rectifying antenna) for radiofrequency (RF) energy-harvesting systems. These rectennas are suitable for wireless sensors with the rechargeable battery technology especially at low-power densities. A rectifying circuit is proposed with single high responsivity Schottky diode for RF–DC conversion. A matching circuit is optimized to improve not only the power transfer between the antenna and the diode, but also to reject harmonic signals. The radiating part is a monopole antenna, with a large bandwidth in the frequency domain and an omni-directional radiation pattern in the azimuthal plane. We show that antenna frequency response takes part in the improvement of the efficiency. The rectifier is integrated with the antenna on a printed circuit board, leading to 30% of size reduction with the same performance. The aim is to reach the highest efficiency with a single tone signal and a compact rectenna. This rectenna was simulated using both Agilent ADS and Ansoft HFSS software. An output DC voltage of 210 mV was measured inside an anechoic chamber which received a single tone signal of 2 µW/cm2power density. The highest efficiency of 34% was obtained at a power density of 1.3 µW/cm2.

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Garcia-Garcia, Joan J. "Considerations for the Design and Implementation of Ambient RF Signal Rectifiers in the 2.45 GHz WiFi Band." Applied Sciences 12, no. 15 (August 5, 2022): 7884. http://dx.doi.org/10.3390/app12157884.

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Ambient RF energy harvesting (RF-EH) is a particular case of wireless power transfer (WPT), which is characterized by ultra-low power operation. This work points out theoretical and practical aspects that should be considered in the design of RF rectifiers for ambient RF energy harvesting systems. The most common RF rectifier circuits are compared and discussed using simulations and experimental data. The efficiency is analyzed in terms of the input power and load resistance. It is demonstrated that the most efficient RF rectifier in ultra-low power conditions is the simple diode capacitor structure. As an illustrative example, an RF rectifier has been fabricated by designing an impedance-matching network to operate into the WIFI band. The fabricated prototype shows a measured 12% efficiency working at 2.47 GHz with around −30 dBm ambient input power, which is higher than the reported efficiencies in the literature. The fabricated energy harvesting system delivers power between 25.6 nW and 129.6 nW to a resistive 10 kΩ load. The obtained results are applicable to ambient RF up to 6 GHz.

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Roy, Sunanda, Jun Jiat Tiang, Mardeni Bin Roslee, Md Tanvir Ahmed, Abbas Z. Kouzani, and M. A. Parvez Mahmud. "Quad-Band Rectenna for Ambient Radio Frequency (RF) Energy Harvesting." Sensors 21, no. 23 (November 25, 2021): 7838. http://dx.doi.org/10.3390/s21237838.

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RF power is broadly available in both urban and semi-urban areas and thus exhibits as a promising candidate for ambient energy scavenging sources. In this research, a high-efficiency quad-band rectenna is designed for ambient RF wireless energy scavenging over the frequency range from 0.8 to 2.5 GHz. Firstly, the detailed characteristics (i.e., available frequency bands and associated power density levels) of the ambient RF power are studied and analyzed. The data (i.e., RF survey results) are then applied to aid the design of a new quad-band RF harvester. A newly designed impedance matching network (IMN) with an additional L-network in a third-branch of dual-port rectifier circuit is familiarized to increase the performance and RF-to-DC conversion efficiency of the harvester with comparatively very low input RF power density levels. A dual-polarized multi-frequency bow-tie antenna is designed, which has a wide bandwidth (BW) and is miniature in size. The dual cross planer structure internal triangular shape and co-axial feeding are used to decrease the size and enhance the antenna performance. Consequently, the suggested RF harvester is designed to cover all available frequency bands, including part of most mobile phone and wireless local area network (WLAN) bands in Malaysia, while the optimum resistance value for maximum dc rectification efficiency (up to 48%) is from 1 to 10 kΩ. The measurement result in the ambient environment (i.e., both indoor and outdoor) depicts that the new harvester is able to harvest dc voltage of 124.3 and 191.0 mV, respectively, which can be used for low power sensors and wireless applications.

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Nataraj, Chandrasekharan, Mahsoom Raseen Abdul Careem, Ravi Lakshmanan, Sathish Kumar Selvaperumal, and Raed Abdulla. "Wireless charging system using spectral energy harvesting technique." Indonesian Journal of Electrical Engineering and Computer Science 15, no. 1 (July 1, 2019): 314. http://dx.doi.org/10.11591/ijeecs.v15.i1.pp314-323.

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<p>This paper presented the energy harvester circuit to enable wireless charging method. The wireless RF spectrum is abundant and potent in the public locations, which can be used for energy harvesting purpose. This is supported by the fact that RF signals are ubiquitous and do not require propagation media of any sort. The system is developed using optimal antenna, matching circuit and charge pump circuit. The 2x2 array type patch antenna operated at 924 MHz is designed and simulated using High Frequency Simulator. The antenna works as a transducer to capture and measure the RF signals from freely available energy source. The field study was conducted at three different highly populated locations such as place of education, place of residence, and place of transport using Software Defined Radio (SDR). The respective acquired RF energy values are -10.45 dBFS (morning), -10.45 dBFS (noon), and -13.33 dBFS (night) at the place of transport for the demonstration purpose. The antenna parameters study also conducted and proved that the antenna gain is good which is greater than 6.6 dB and also return loss greater than -43dB. In addition, charge pump circuit is designed and shown to be capable of boosting the voltage more than 2.5 V easily at the different frequencies for wireless charging purpose.<em></em></p>

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Boopathi, C. S., M. Sivaram, T. V. P. Sundararajan, R. Maheswar, P. Yupapin, and Iraj S. Amiri. "Bandenna for RF energy harvesting and flexible electronics." Microsystem Technologies 27, no. 4 (February 15, 2021): 1857–61. http://dx.doi.org/10.1007/s00542-021-05212-5.

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Elsheakh, Dalia, Mina Farouk, Hala Elsadek, and Hani Ghali. "Quad-Band Rectenna for RF Energy Harvesting System." Journal of Electromagnetic Analysis and Applications 12, no. 05 (2020): 57–70. http://dx.doi.org/10.4236/jemaa.2020.125006.

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Khansalee, Ekkaphol, Kittipong Nuanyai, and Yan Zhao. "A Dual-Band Rectifier for RF Energy Harvesting." Engineering Journal 19, no. 5 (October 31, 2015): 189–97. http://dx.doi.org/10.4186/ej.2015.19.5.189.

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Kontagora, Nuhu Bello, Idris Aji Dauda, Yahaya Zurmi, Nanre Banwat Sharon, Sangwon Oh, and Ibrahim Aliyu. "RF energy harvesting system for charging mobile phones." Journal of Contents Computing 4, no. 1 (June 30, 2022): 401–15. http://dx.doi.org/10.9728/jcc.2022.06.4.1.401.

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Thuy. "A WIDEBAND ANTENNA ARRAY FOR RF ENERGY HARVESTING." Journal of Military Science and Technology, no. 72A (May 10, 2021): 39–45. http://dx.doi.org/10.54939/1859-1043.j.mst.72a.2021.39-45.

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In this paper, we introduce a wideband antenna array for RF energy harvesting from 3G/4G and Wi-Fi. The array consists of four parallelly linked wideband antenna elements and a metallic reflector to enhance gain and suppress back lobe radiation. In measurement, the antenna array possesses a wide bandwidth spanning from 1.6 GHz to 2.5 GHz, fully cover the three harvested bands, and the high gains between 13.5 dBi and 14 dBi. The antenna is employed in a multiband rectenna for energy harvesting and placed in the ambience. The rectenna was able to collect up to 0.27 mW power.

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