Enhancement of output power level of RF Energy Harvesting Circuit Using Wilkinson Power Combiner

2022 ◽  
Author(s):  
Joydeep Banerjee
Keyword(s):  
Energy Harvesting ◽  
Output Power ◽  
Power Level ◽  
Output Power Level ◽  
Power Combiner ◽  
Rf Energy Harvesting ◽  
Rf Energy

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.

Analysis of Matching Circuit to Improve the Efficiency of RF to DC Conversion for Ambiet RF Energy Harvesting

2014 ◽  
Vol 699 ◽  
pp. 909-914 ◽  
Author(s):  
Zahriladha Zakaria ◽  
Nurul Nadia Razak ◽  
Nur Aishah Zainuddin ◽  
Mohd Nor Husain ◽  
Yosza Dasril
Keyword(s):  
Comparative Analysis ◽  
Energy Harvesting ◽  
Output Power ◽  
Significant Influence ◽  
Short Circuit ◽  
Open Circuit ◽  
Rf Energy Harvesting ◽  
Optimum Technique ◽  
Parametric Studies ◽  
Rf Energy

This paper presents an analysis of matching circuit with rectifier for RF energy harvesting. The matching circuit has a significant influence to improve the efficiency of RF-DC conversion. In this paper, comparative analysis of rectifier efficiency is performed, particularly the rectifier with-and without-matching circuit. The analysis is conducted using ADS simulation version 2011, to determine the output power as well as the efficiency of the rectifier. The results show the rectifier with-matching circuit produced higher efficiency about 72%, compared to the rectifier without-matching circuit which is only achieved 20% of the efficiency. The effects of tuning the matching circuit upon the rectifier efficiency had been studied. In this paper, the parametric studies of the effect of short circuit and open circuit stubs tuning are performed to determine the efficiency of the rectifier. The results show matching circuit after tuning produced higher efficiency compared to matching circuit before tuning. This study is useful to provide an insight on the optimum technique to design RF energy harvesting.

scholarly journals RF Energy Harvesting System Based on an Archimedean Spiral Antenna for Low-Power Sensor Applications

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1318 ◽  
Author(s):  
Antonio Alex-Amor ◽  
Ángel Palomares-Caballero ◽  
José Fernández-González ◽  
Pablo Padilla ◽  
David Marcos ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Power Level ◽  
Storage Capacitor ◽  
Spiral Antenna ◽  
Archimedean Spiral ◽  
Rf Energy Harvesting ◽  
Correct Operation ◽  
Energy Harvesting System ◽  
Rf Energy

This paper presents a radiofrequency (RF) energy harvesting system based on an ultrawideband Archimedean spiral antenna and a half-wave Cockcroft-Walton multiplier circuit. The antenna was proved to operate from 350 MHz to 16 GHz with an outstanding performance. With its use, radio spectrum measurements were carried out at the Telecommunication Engineering School (Universidad Politécnica de Madrid) to determine the power level of the ambient signals in two different scenarios: indoors and outdoors. Based on these measurements, a Cockcroft-Walton multiplier and a lumped element matching network are designed to operate at 800 MHz and 900 MHz frequency bands. To correct the frequency displacement in the circuit, a circuit model is presented that takes into account the different parasitic elements of the components and the PCB. With an input power of 0 dBm, the manufactured circuit shows a rectifying efficiency of 30%. Finally, a test is carried out with the full RF energy harvesting system to check its correct operation. Thus, the RF system is placed in front of a transmitting Vivaldi antenna at a distance of 50 cm. The storage capacitor has a charge of over 1.25 V, which is enough to run a temperature sensor placed as the load to be supplied. This demonstrates the validity of the RF energy harvesting system for low-power practical applications.

A Metamaterial-Inspired Small Rectenna for RF Energy Harvesting Based on a 3-Way Power Combiner

2019 ◽  
Author(s):  
Abdel-Ghafour Abraray ◽  
Kazi Mohammed Saidul Huq ◽  
Shahid Mumtaz ◽  
Jonathan Rodriguez ◽  
Otman El Mrabet ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Power Combiner ◽  
Rf Energy Harvesting ◽  
Rf Energy
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