Faculty of Engineering and the Built Environment;
School of Electrical and Information System;
MSC Dissertation / In this paper, the Electronically Steerable Parasitic Array Radiator (ESPAR) antenna, developed by the Advanced Telecommunications
Research Institute (ATR) in Japan was analyzed to determine its feasibility as a low cost direction finding (DF)
system. Simulations of the antenna were performed in SuperNEC and Matlab was used to determine the direction of arrival
(DOA) using the Reactance Domain multiple signal classification (MUSIC) algorithm. Results show the ideal configuration
has 6 parasitic elements with a diameter of 0.5 . Up to 5 periodic, uncorrelated signals spread 360° in azimuth and above 45°
elevation produce sharp peaks in the MUSIC spectra. Azimuth separations of only 2° at 40 dB are resolvable while signals
arriving with 25% full power are still detectable. For the DOA to be resolved the radiation pattern should be asymmetrical and
hence the reactance set should have a range of unequal values. Comparative results show that the 6 element ESPAR offers excellent
overall performance despite the reduction in cost and is comparable in performance to the 6 element uniform linear array.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:wits/oai:wiredspace.wits.ac.za:10539/1499 |
| Date | 27 October 2006 |
| Creators | Berger, Jonathan Michael |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | 16927153 bytes, application/pdf, application/pdf |
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