dc.contributor.author	Monkevich, James Matthew	en
dc.contributor.committeechair	Besieris, Ioannis M.	en
dc.contributor.committeemember	Scales, Wayne A.	en
dc.contributor.committeemember	Riad, Sedki Mohamed	en
dc.contributor.department	Electrical and Computer Engineering	en
dc.date.accessioned	2014-03-14T20:51:37Z	en
dc.date.adate	1998-05-07	en
dc.date.available	2014-03-14T20:51:37Z	en
dc.date.issued	1998-05-04	en
dc.date.rdate	1998-05-07	en
dc.date.sdate	1998-05-04	en
dc.description.abstract	In order to accurately describe the behavior of an antenna, one needs to understand the radiation mechanisms that govern its operation. One way to gain such an insight is to view the fields and currents present on a radiating structure. Unfortunately, in close proximity to an antenna empirical techniques fail because the measurement probe alters the operation of the radiating structure. Computational methods offer a solution to this problem. By simulating the operation of an antenna, one can obtain electromagnetic field data near (or even internal to) a radiating structure. However, these computationally intense techniques often generate extremely large data sets that cannot be adequately interpreted using traditional graphical approaches. A visualization capability is developed that allows an analysis of the above-mentioned data sets. With this technique, the data is viewed from a unique, global perspective. This format is well suited for analytical investigations as well as debugging during modeling and simulation. An illustrative example is provided in the context of a rectangular microstrip patch antenna. A comparison is performed between the visualized data and the theory of operation for the microstrip patch in order to demonstrate that radiation mechanisms can be obtained visually. An additional analysis tool is developed using Gabor filters and image-processing techniques. This tool allows one to detect and filter electromagnetic waves propagating with different velocities (both speed and direction). By doing so, each mode of an antenna can be analyzed independently. The fields of a multi-moded, open-ended rectangular waveguide are analyzed in order to demonstrate the effectiveness of these techniques.	en
dc.description.degree	Master of Science	en
dc.identifier.other	etd-4698-13362	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-4698-13362/	en
dc.identifier.uri	http://hdl.handle.net/10919/36735	en
dc.language.iso	en	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	etd.pdf	en
dc.relation.haspart	ch1.pdf	en
dc.relation.haspart	ch2.pdf	en
dc.relation.haspart	ch3.pdf	en
dc.relation.haspart	ch4.pdf	en
dc.relation.haspart	ch5.pdf	en
dc.relation.haspart	ch6.pdf	en
dc.relation.haspart	refs.pdf	en
dc.relation.haspart	vita.pdf	en
dc.relation.haspart	fig3_09.mov	en
dc.relation.haspart	fig3_10.mov	en
dc.relation.haspart	fig3_11.mov	en
dc.relation.haspart	fig3_12.mov	en
dc.relation.haspart	fig5_06.mov	en
dc.relation.haspart	fig5_07.mov	en
dc.relation.haspart	fig5_08.mov	en
dc.relation.haspart	fig5_11.mov	en
dc.relation.haspart	fig5_12.mov	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	visualization	en
dc.subject	computational electromagnetics	en
dc.subject	image-processing	en
dc.subject	antennas	en
dc.title	Analysis of Aperture Radiation Using Computer Visualization and Image-Processing Techniques	en
dc.type	Thesis	en
thesis.degree.discipline	Electrical and Computer Engineering	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	masters	en
thesis.degree.name	Master of Science	en

Analysis of Aperture Radiation Using Computer Visualization and Image-Processing Techniques

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