Survey on RF Energy Harvesting and Wireless Power Transmission

2018 ◽  
Vol 43 (11) ◽  
pp. 1877-1886
Author(s):  
Seungwook Min
Keyword(s):  
Energy Harvesting ◽  
Power Transmission ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Rf Energy Harvesting ◽  
Rf Energy

scholarly journals Novel RF energy harvesting using Rectenna

2021 ◽  
Vol 2070 (1) ◽  
pp. 012112
Author(s):  
Nikhil Purohit ◽  
Imaculate Rosaline
Keyword(s):  
Energy Harvesting ◽  
Power Transmission ◽  
Low Cost ◽  
Wireless Power ◽  
Rf Energy Harvesting ◽  
Low Threshold ◽  
Rf Energy ◽  
Rectenna Design ◽  
Performance Results ◽  
Good Agreement

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.

scholarly journals An Enhanced Multiplication of RF Energy Harvesting Efficiency Using Relay Resonator for Food Monitoring

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 1963 ◽  
Author(s):  
Xuan-Tu Cao ◽  
Wan-Young Chung
Keyword(s):  
Energy Harvesting ◽  
Power Transmission ◽  
Near Field ◽  
Magnetic Coupling ◽  
Electrical Energy ◽  
Transmission Efficiency ◽  
Smart Sensor ◽  
Rf Energy Harvesting ◽  
Sensor Module ◽  
Rf Energy

Recently, radio frequency (RF) energy harvesting (RFEH) has become a promising technology for a battery-less sensor module. The ambient RF radiation from the available sources is captured by receiver antennas and converted to electrical energy, which is used to supply smart sensor modules. In this paper, an enhanced method to improve the efficiency of the RFEH system using strongly coupled electromagnetic resonance technology was proposed. A relay resonator was added between the reader and tag antennas to improve the wireless power transmission efficiency to the sensor module. The design of the relay resonator was based on the resonant technique and near-field magnetic coupling concept to improve the communication distance and the power supply for a sensor module. It was designed such that the self-resonant frequencies of the reader antenna, tag antenna, and the relay resonator are synchronous at the HF frequency (13.56MHz). The proposed method was analyzed using Thevenin equivalent circuit, simulated and experimental validated to evaluate its performance. The experimental results showed that the proposed harvesting method is able to generate a great higher power up to 10 times than that provided by conventional harvesting methods without a relay resonator. Moreover, as an empirical feasibility test of the proposed RF energy harvesting device, a smart sensor module which is placed inside a meat box was developed. It was utilized to collect vital data, including temperature, relative humidity and gas concentration, to monitor the freshness of meat. Overall, by exploiting relay resonator, the proposed smart sensor tag could continuously monitor meat freshness without any batteries at the innovative maximum distance of approximately 50 cm.

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