scholarly journals State-of-the-Art Techniques in RF Energy Harvesting Circuits

Telecom ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 369-389
Author(s):  
Ioannis D. Bougas ◽  
Maria S. Papadopoulou ◽  
Achilles D. Boursianis ◽  
Konstantinos Kokkinidis ◽  
Sotirios K. Goudos
Keyword(s):  
Energy Harvesting ◽  
State Of The Art ◽  
Impedance Matching ◽  
Energy Scavenging ◽  
Rf Energy Harvesting ◽  
Energy Devices ◽  
Advantages And Disadvantages ◽  
Receiving Antenna ◽  
Rf Energy ◽  
Continuous Use

The exigency for continuous use of electrical devices has created greater demands for electricity along with more efficient transmission techniques. Energy from natural resources can be solar, thermal, vibration, friction, or Radio Frequencies (RF) signals. This state-of-the-art work provides a summary of RF energy harvesting techniques and can be used as a guide for the manufacture of RF energy scavenging modules. The use of Radio Frequency (RF) Energy Harvesting (EH) technique contributes to the development of autonomous energy devices and sensors. A rectenna system includes three main units: the receiving antenna, the impedance matching network, and the rectifier. We thoroughly analyze how to design a rectenna system with special emphasis given on the design of the rectifier. At the same time many works of the last 10 years are presented. This review article categorizes the used topologies depending on the type of antennas, IMNs, and rectifiers and comparatively presents their advantages and disadvantages.

State-of-the-Art Technologies in RF Energy Harvesting Circuits – A Review

2020 ◽  
Author(s):  
Ioannis D. Bougas ◽  
Maria S. Papadopoulou ◽  
Konstantinos Psannis ◽  
Panagiotis Sarigiannidis ◽  
Sotirios. K. Goudos
Keyword(s):  
Energy Harvesting ◽  
State Of The Art ◽  
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.

scholarly journals A Dual-Band Antenna for RF Energy Harvesting Systems in Wireless Sensor Networks

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
A. Bakkali ◽  
J. Pelegri-Sebastia ◽  
T. Sogorb ◽  
V. Llario ◽  
A. Bou-Escriva
Keyword(s):  
Energy Harvesting ◽  
Dual Band ◽  
Design Parameters ◽  
Rf Energy Harvesting ◽  
Radio Frequency Energy ◽  
Dual Band Antenna ◽  
Receiving Antenna ◽  
Harvesting Systems ◽  
Rf Energy ◽  
5 Ghz

In this paper, we focus on ambient radio frequency energy available from commercial broadcasting stations in order to provide a system based on RF energy harvesting using a new design of receiving antenna. Several antenna designs have been proposed for use in RF energy harvesting systems, as a pertinent receiving antenna design is highly required since the antenna features can affect the amount of energy harvested. The proposed antenna is aimed at greatly increasing the energy harvesting efficiency over Wi-Fi bands: 2.45 GHz and 5 GHz. This provides a promising alternative energy source in order to power sensors located in harsh environments or remote places, where other energy sources are impracticable. The dual-band antenna can be easily integrated with RF energy harvesting system on the same circuit board. Simulations and measurements were carried out to evaluate the antenna performances and investigate the effects of different design parameters on the antenna performance. The receiving antenna meets the required bandwidth specification and provides peak gain of more than 4 dBi across the operating band.

scholarly journals RF Energy Harvesting for Ubiquitous, Zero Power Wireless Sensors

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Warda Saeed ◽  
Nosherwan Shoaib ◽  
Hammad M. Cheema ◽  
Muhammad U. Khan
Keyword(s):  
Energy Harvesting ◽  
Wireless Sensors ◽  
State Of The Art ◽  
Detailed Comparison ◽  
Portable Devices ◽  
Wireless Power ◽  
Environment Friendly ◽  
Rf Energy Harvesting ◽  
Rf Energy ◽  
Rectenna Design

This paper presents a review of wireless power transfer (WPT) followed by a comparison between ambient energy sources and an overview of different components of rectennas that are used for RF energy harvesting. Being less costly and environment friendly, rectennas are used to provide potentially inexhaustible energy for powering up low power sensors and portable devices that are installed in inaccessible areas where frequent battery replacement is difficult, if not impossible. The current challenges in rectenna design and a detailed comparison of state-of-the-art rectennas are also presented.

scholarly journals Flexible milimeter-wave microstrip patch antenna array for wearable RF energy harvesting applications

2021 ◽  
Vol 11 (3) ◽  
pp. 1976
Author(s):  
Mohd Saiful Riza Bashri ◽  
Noor Amalina Ramli
Keyword(s):  
Energy Harvesting ◽  
Antenna Array ◽  
Patch Antenna ◽  
Impedance Matching ◽  
Microstrip Patch Antenna ◽  
Structural Deformation ◽  
Body Parts ◽  
Rf Energy Harvesting ◽  
Microstrip Patch ◽  
Rf Energy

In this paper, a series-fed milimeter-wave microstrip patch antenna array operating at 28 GHz is presented for wearable radio-frequency (RF) energy harvesting applications. The antenna array is made of 4×4 rectangular microstrip elements on a polyethylene terephthalate (PET) substrate to provide conformability when directly attached on human body parts. A 4-way Wilkinson power divider is connected to the array for RF power combining. The overall size of the antenna is 47×28×0.25 mm. The half-power beamwidth (HPBW) of the antenna array can be increased up to 151.9⁰ via structural deformation making it suitable for energy harvesting applications. The performance of the antenna array is investigated in terms of impedance matching, gain and radiation pattern. The average simulated specific absorption rate (SAR) of the antenna is 0.52 W/kg which is well below the safety limit of 1.6 W/kg averaged over 1 g of tissue for 100 mW of input power.

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