Power dividers are vital components and widely used in radio technology, such
as antenna arrays, power amplifiers, multiplexers and mixers. A good example is
the well-known Wilkinson power divider with its distinctive feeding network
characteristics. A comprehensive review indicated that limited research is carried
out in the area of planar multiport and reconfigurable power dividers in terms of
the power levels between output ports.
The main objectives of this work were to develop a small size power divider, a
planer multi-output ports power divider and a power divider with a reconfigurable
power division ratio. These power dividers were designed to operate over either
an ultra-wideband frequency (3.1-10.6 GHz) or WLAN bands (2.4 or 5.2 GHz).
A novel multi-layered topology solved the complexity of interconnecting isolation
resistors by introducing an additional layer below the ground layer. The prototype
was fabricated and tested to validate the results. The measurements and
simulation were in good agreement.
Finally, a novel uniplanar power divider with reconfigurable output power level
difference was developed. The configurability feature was achieved by tuning the
quarter wave transformer using one varactor diode. The power divider was
applied to improve a full duplex system cancellation performance at the receiver
element caused by interference from in-site transmitting antennas.
This study investigated fixed power dividers, multi-output power dividers and
reconfigurable power dividers. The measurements validated by the simulation
results and applications proved the designed power dividers could be used in
practical applications. / Higher Committee for Education Development (HCED), Iraq
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/17447 |
| Date | January 2018 |
| Creators | Ali, Ammar H.A. |
| Contributors | Abd-Alhameed, Raed |
| Publisher | University of Bradford, University of Bradford, Faculty of Engineering and Informatics |
| 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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