Design and Development of Wireless Power Transmission for Unmanned Air Vehicles

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Authors
Huang, Chung-Huan
Subjects
Wireless Power Transmission
Full-wave rectenna
Schottky Diode
Advisors
Jenn, David C.
Date of Issue
2012-09
Date
Sep-12
Publisher
Monterey, California. Naval Postgraduate School
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Abstract
This thesis is an exploration of microwave wireless power transmission (WPT) for micro-air vehicles (MAVs). WPT, converting radio frequency (rf) power into usable direct current (dc) power, can be implemented with a rectifying antenna, or rectenna. The emphasis of this thesis is on the simulation of rectenna efficiency and measurement of experimental hardware. In this thesis, power reflection in the rectifier matching circuit was investigated by a series of simulations using Agilent Advanced Design System (ADS). Tuning elements were added and adjusted in order to optimize the efficiency. A maximum efficiency of 57 per cent was obtained at 10 gigahertz (GHz) with 200 mW input to the rectenna. A full-wave rectenna was built and hardware experiments were conducted to measure the efficiency of the WPT and characterize the behavior of the circuit. The design is optimized for an input power of 200 mW but, because of hardware limitations, only low-input power levels (about 1 mW) could be tested. A comparison of measurement and simulation results is given, and possible reasons for the differences are discussed.
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Thesis
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Electronic Warfare Systems Engineering
Electrical Engineering
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