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OSU-Dissertation-FINAL.pdf (14.85 MB)

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Integration of Radio Frequency Harvesting with Low Power Sensors

DeLong, Brock J
http://rave.ohiolink.edu/etdc/view?acc_num=osu152408949118599

Abstract Details

2018, Doctor of Philosophy, Ohio State University, Electrical and Computer Engineering.
This dissertation gives guidelines for state-of-the-art power harvesters and for optimizing its components, e.g., rectifier, matching network, and antenna, in various applications. A single diode rectifier using a quarter-wave matching circuit with a measured efficiency of 73.7% is also presented. Several experimental demonstrations are included for powering a number of sensors and devices, such as a clock, computer mouse, calculator, thermometer, medical insulin pump, and super capacitor with power management circuitry. To increase the amount of RF harvested power, an array of rectifying antennas (rectennas) is presented and used in experiments up to 60 meters. Wireless power transfer demonstrations at near field distances are also presented. For the latter, we show a strong tolerance to misalignment while delivering high levels of power (1.2 mW over 42 cm). As an application, a medical pump is successfully powered over this distance. Further, bandwidth widening techniques are presented along with rectifier optimizations. To reduce the overall dimensions of the rectenna, miniaturization techniques are discussed. This leads to a rectenna size of 1.5 x 2.5 cm^2, making it ideal for medical or on-body applications. This rectenna was used to successfully activate a body-worn thermometer across 65 cm. In the case of implantable devices, a dielectric matching layer was found useful and validated using pig skin. A related SAR analysis ensured the safety of the proposed RF powering harvesting techniques.
John Volakis (Advisor)
Asimina Kiourti (Advisor)
Liang Guo (Committee Member)
122 p.
Electrical Engineering; Electromagnetics
power harvesting; wireless power; WPT; medical devices; wireless power transfer; wireless power transmission

Recommended Citations

Citations

  • DeLong, B. J. (2018). Integration of Radio Frequency Harvesting with Low Power Sensors [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu152408949118599

    APA Style (7th edition)

  • DeLong, Brock. Integration of Radio Frequency Harvesting with Low Power Sensors. 2018. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu152408949118599.

    MLA Style (8th edition)

  • DeLong, Brock. "Integration of Radio Frequency Harvesting with Low Power Sensors." Doctoral dissertation, Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu152408949118599

    Chicago Manual of Style (17th edition)

osu152408949118599
958
© 2018, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.