Abstract

Cognitive radio is one of the most promising techniques to efficiently utilize the radio frequency (RF) spectrum. As the Digital Video Broadcasting-Handheld (DVB-H) band is targeted (470-862 MHz), the size of the antenna becomes challenging. Metamaterial concept is used as a miniaturization technique. Two antennas are designed, fabricated and measured. The first one achieved multiband operation by loading it with a metamaterial unit cell. These bands are controlled by engineering the dispersion relation of the unit cell. The second one, which is a 2-lumped elements loaded antenna, achieved wideband operation through the entire DVB-H band with a planar size of 5×2 cm^2. A model is proposed to explain, through simple numerical simulations and an optimization algorithm, the behavior of these component loaded antennas (which are equivalent to metamaterial inspired electrically small antennas).

Department

Electronics & Communications Engineering Department

Degree Name

MS in Electronics & Communication Engineering

Date of Award

6-1-2013

Online Submission Date

May 2013

First Advisor

Darwish, Dr. Ali

Committee Member 1

Safwat, Dr. Amr

Committee Member 2

Ismail, Dr. Yehea

Document Type

Thesis

Extent

120 p.

Library of Congress Subject Heading 1

Radio -- Antens.

Library of Congress Subject Heading 2

Wireless communication systems.

Rights

The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy.

IRB

Approval has been obtained for this item

Comments

The work in this thesis was sponsored by NTRA. The project was called: Ebling Techniques for TV Band Cognitive Radios I would like to express my deep appreciation for my supervisors, Dr. Amr Safwat and Dr. Ali Darwish for their endless support and help throughout this thesis. I would also like to acknowledge the help I had received from my friend in the Microwave Lab., Eng. Amr A. Ibrahim. Filly, I would like to thank Eng. Ola Galal for her help in wielding the lumped inductors.

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