Abstract
Radio Frequency (RF) energy harvesting is a promising alternative energy source to provide power for low power electronic devices through the air. RF energy harvesting technologies are used in many application fields such as building automation, industrial monitoring, data center, security and defense. In this study, effects of frequency shift keying modulation technique on charging times of RF energy harvesting were measured and investigated in detail. An advanced measurement system was established and this measurement system was performed using an RF energy harvesting circuit, a signal generator, patch antennas and other equipment. The modulated signal at 14 dBm output power was generated by signal generator. Then, the energy produced by the signal generator was obtained from 20 cm to 60 cm at the interval of 5 cm distance by the RF energy harvesting circuit with 6 dBi patch antenna. According to measurement results, the shortest charging time was calculated as 1 s at a distance of 20 cm. In addition to that, the longest charging time was calculated as 7 s at a distance of 60 cm. It was determined that the charging time of the RF energy harvesting decreased as the distance between signal generator and RF energy harvesting circuit reduced.
Highlights
There are many kinds of energy sources such as solar, mechanical vibrations, thermal gradients and electromagnetic waves in nature
The measurement system consists of Universal Software Radio Peripheral (USRP) -2900 Software Defined Radio from National Instruments [24], P2110 Powerharvester module from Powercast Company [25], WSN-Eval-01 Wireless Sensor Board, XLP 16-bit Development Board and PICtail Daughter Card and Patch Antennas
The time difference between the consecutive packets was calculated as charging time for Radio Frequency (RF) energy harvesting
Summary
There are many kinds of energy sources such as solar, mechanical vibrations, thermal gradients and electromagnetic waves in nature. A Radio Frequency (RF) energy harvesting technology is a promising alternative energy source to feed low power electronic devices through the air. Due to the increase in the number of low power electronic devices in the ambient environment, it is hoped that this technology will be widely used in future. Measurement of power densities of the electromagnetic waves is important for efficient RF energy harvesting. There are many studies on this subject in the literature [1]–[9]. The operating frequency of an RF energy harvesting circuit should be designed according to the most powerful frequency band in the environment.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
