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Introducing of parasitic elements to short backfire antenna for radiation pattern improvement

Madar, Ahmed Mohamed (2014) Introducing of parasitic elements to short backfire antenna for radiation pattern improvement. Masters thesis, Universiti Tun Hussein Onn Malaysia.


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Short backfire antenna has an enclosed structure with two reflectors on top of each other conventionally short backfire antenna is characterized by gain of above 10 dB, making it attractive for handheld radio monitoring and other man-portable applications. However, a microstrip patch fed short backfire antenna had a broad E-plane radiation pattern main lobe, leading to a loss of gain and low aperture efficiency. Using commercially available CST microwave software the aim of this project was to design a short backfire antenna which has symmetric E&H planes radiation pattern. Adding six parasitic wires inside the cavity of a short backfire was found to narrow the E-plane radiation pattern main lobe, making it more like the H-plane radiation pattern and increasing the peak gain making it to around 15.5 dB. A single proof of concept antenna was built at 2.4 GHz with a microstrip patch fed with coaxial probe and have shown equalized principle planes.

Item Type: Thesis (Masters)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-5865 Telecommunication. Telegraph.
Depositing User: Normajihan Abd. Rahman
Date Deposited: 01 Jul 2014 03:50
Last Modified: 01 Jul 2014 03:50
URI: http://eprints.uthm.edu.my/id/eprint/5478
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