A Novel Six-Band Dual CP Rectenna Using Improved Impedance Matching Technique for Ambient RF Energy Harvesting

2016 ◽  
Vol 64 (7) ◽  
pp. 3160-3171 ◽  
Author(s):  
Chaoyun Song ◽  
Yi Huang ◽  
Paul Carter ◽  
Jiafeng Zhou ◽  
Sheng Yuan ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Impedance Matching ◽  
Rf Energy Harvesting ◽  
Matching Technique ◽  
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 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.

scholarly journals Dielectric Resonator Rectenna for RF Energy Harvesting System

2019 ◽  
Vol 9 (2) ◽  
pp. 4834-4839
Keyword(s):  
Energy Harvesting ◽  
Dielectric Resonator ◽  
Electromagnetic Waves ◽  
Impedance Matching ◽  
Dielectric Resonator Antenna ◽  
Rf Energy Harvesting ◽  
Dc Power ◽  
Energy Harvesting System ◽  
Rf Energy ◽  
Dc Current

Recently, the various methods for RF energy harvesting and reutilizing has become the challenging matter around the world to minimize the wastage of RF energy in the form of electromagnetic waves within the atmosphere. An associate approach of collecting a particular range of frequencies & conversion into dc current- Rectenna is proposed here. Star shaped Dielectric Resonator Antenna is implemented as antenna for receiving RF energy at 2.44 GHz resonant frequency. It is observed that Star shaped DRA exhibits a radiated power of 0.8825 W with respect to 1W incident power and maximum gain of 5.9672 dBi. The RF power received by Antenna is given to a Rectifier circuit via proper impedance matching circuit. The rectified pulsating DC power is given to capacitor filter to suppress harmonics .

scholarly journals 3.3V DC output at -16dBm sensitivity and 77% PCE rectifier for RF energy harvesting

2019 ◽  
Vol 10 (3) ◽  
pp. 1398
Author(s):  
Astrie Nurasyeila Fifie Asli ◽  
Yan Chiew Wong
Keyword(s):  
Energy Harvesting ◽  
Power Efficiency ◽  
High Efficiency ◽  
Impedance Matching ◽  
High Sensitivity ◽  
Oxide Thickness ◽  
Process Technology ◽  
Rf Energy Harvesting ◽  
Energy Harvesting System ◽  
Rf Energy

<span>This paper presents a high voltage conversion at high sensitivity RF energy harvesting system for IoT applications. The harvesting system comprises bulk-to-source (BTMOS) differential-drive based rectifier to produce a high efficiency RF energy harvesting system. Low-pass upward impedance matching network is applied at the rectifier input to increase the sensitivity and output voltage. Dual-oxide-thickness transistors are used in the rectifier circuit to maintain the power efficiency at each stage of the rectifier. The system is designed using 0.18µm Silterra RF in deep n-well process technology and achieves 4.07V output at -16dBm sensitivity without the need of complex auxiliary control circuit and DC-DC charge-pump circuit. The system is targeted for urban environment.</span>

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