Candidate: Mohammed Aldosari
Title: Wideband Rectenna System for Microwave Power Transfer
Date: August 1, 2018
Time: 2:00 PM
Place: EIT 3141
Supervisor(s): Ramahi, Omar M.
One of the fundamental devices in Microwave Power Transfer (MPT) is the rectenna or rectifying antenna, which collects the electromagnetic energy from the free space and convert it directly to a useful DC power. Although many designs of rectenna systems have been proposed, most of them operate in a narrowband frequency and/or a certain level of incident power, which limits the output DC power and the uses of the rectenna.
In this work, three novel designs of the rectenna that operate in broadband frequency and wide range of received power are developed. The design methodology for such critical characteristics for the rectenna has been discussed in details. Furthermore, the presented wideband rectennas have the best results comparing to the literature in terms of frequency bandwidth and power range, which indicates great achievement in terms of increasing the output DC power significantly as a result of decreasing the effect of the variation of the frequency and incident power and the ability of harvesting multiple frequencies simultaneously.
Furthermore, the wideband rectenna can be considered as an approach to minimize the number of the used rectennas by having a single rectenna that operates in a wide frequency bandwidth and wide range of incident power. The best proposed rectenna operates from 0.5 – 5.4 GHz with 80% and 30% as maximum and minimum RF-DC conversion efficiency. In addition, it can operate within an incident power range of 3 to 25dBm at 3.4GHz.
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