The aim of this study is to analysis, investigate and find out the solutions for the
problems associated with the implementations of antennas RFID Reader and Tag
for various applications. In particular, the efficiency of the RFID reader antenna
and the detection range of the RFID tag antenna, subject to a small and compact
antenna¿s design configuration have been studied.
The present work has been addressed directly to reduce the cost, size and increase
the detection range and communication reliability of the RFID framework
antennas. Furthermore, the modelling concept of RFID passive tags mounted on
various materials including the novel design of RFID reader antenna using
Genetic Algorithm (GA) are considered and discussed to maintain reliable and
efficient antenna radiation performances.
The main benefit of applying GA is to provide fast, accurate and reliable solutions
of antenna¿s structure. Therefore, the GA has been successfully employed to
design examples: meander-line, two linear cross elements and compact Helical-
Spiral antennas.
In addition, a hybrid method to model the human body interaction with RFID tag
antenna operating at 900MHz has been studied. The near field distribution and the
radiation pattern together with the statistical distribution of the radiation
efficiency and the absorbed power in terms of cumulative distribution functions
for different orientation and location of RFID¿s tag antenna on the human body
have been demonstrated.
Several tag antennas wi th symmetrical and unsymmetrical structure configurations
operating in the European UHF band 850-950 MHz have been fabricated and
tested. . The measured and simulated results have been found to be in a good
agreement with reasonable impedance matching to the typical input impedance of
an RFID integrated circuit chip and nominal power gain and radiation patterns.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/6340 |
| Date | January 2012 |
| Creators | Al Khambashi, Majid S. |
| Contributors | Rajamani, Haile S., Abd-Alhameed, Raed |
| Publisher | University of Bradford, School of Engineering, Design and Technology |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Thesis, doctoral, PhD |
| Rights | <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br />The University of Bradford theses are licenced under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Licence</a>. |
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