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Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD! >
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Thesis - Computer Engineering >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/123456789/1566
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| Title: | Design of Phase Tunability of Conductor Backed Coplanar Waveguide (CPW) Patch Antenna. |
| Authors: | Tsegaye, Arega |
| Advisors: | DR.Ing.Mohammed Abdo |
| Copyright: | Apr-2008 |
| Date Added: | 30-Oct-2008 |
| Publisher: | Addis Ababa |
| Abstract: | Traditionally beam steering in phase array antenna system is achieved using tunable
phase shifter or switched feed network. Here, a tunable patch antenna element is
suggested as a novel alternative to a combination of a radiating element and a phase
shifter. A coplanar wave guide patch antenna is chosen due to its suitability to mount
external tuning elements, using varactor diode.
Approximate analytical models for coplanar waveguide patch antennas with finite ground
plane have been developed in the literature; such approach is limited to finite ground
plane coplanar waveguide patch antenna only. Numerical result from approximate made
were used as initial value in optimized simulation using math lab and Empire software
tool. Coplanar waveguide patch antennas were constructed to re-tune to the desired
frequency and tuning element was surface mounted.
The result obtained reveals a significant amount of phase shift with in the desired
bandwidth at the center frequency of 1.04GHz. Alternative tuning with ferroelectric
elements and distributed tuning is suggested as further research |
| Description: | A Thesis Submitted to the School of Graduate studies of Addis
Ababa University, in partial Fulfillment of the Requirements for
the Degree of Master of Science in Electrical Engineering
(communication engineering). |
| URI: | http://hdl.handle.net/123456789/1566 |
| Appears in: | Thesis - Computer Engineering
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