Aperture synthesis of time-limited X waves and analysis of their propagation characteristics

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dc.contributorBradley Department of Electrical and Computer Engineeringen
dc.contributorMotorola. Paging Groupen
dc.contributorCairo University. Department of Engineering Physics and Mathematicsen
dc.contributor.authorChatzipetros, Argyrios A.en
dc.contributor.authorShaarawi, Amr M.en
dc.contributor.authorBesieris, Ioannis M.en
dc.contributor.authorAbdel-Rahman, Mohammad J.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessed2015-05-12en
dc.date.accessioned2015-05-26T19:30:58Zen
dc.date.available2015-05-26T19:30:58Zen
dc.date.issued1998-05-01en
dc.description.abstractThe feasibility of exciting a localized X-wave pulse from a finite aperture is addressed. Also, the possibility of using a finite-time excitation of a dynamic aperture to generate a finite-energy approximation to an X-wave pulse is explored. The analysis is carried out by using a Gaussian time window to time limit the infinite X-wave initial excitation. Huygens' construction is used to calculate the amplitude of the radiated wave field away from the finite-time source. The decay rate of the peak of the X wave is compared to that of a quasi-monochromatic signal. It is shown that the finite-time X-wave propagates to much farther distances without significant decay. Furthermore, the decay pattern of the radiated X-wave pulse is derived for a source consisting of an array of concentric annular sections. The decay behavior of the radiated pulse is similar to that of an X-wave launched from a finite-time aperture. This confirms the fact that time windowing the infinite energy X-wave excitation is a viable scheme for constructing finite apertures. A discussion of the diffraction limit of the X-wave pulse is also provided.en
dc.format.extent9 pagesen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationChatzipetros, A. A., Shaarawi, A. M., Besieris, I. M., & Abdel-Rahman, M. A. (1998). Aperture synthesis of time-limited X waves and analysis of their propagation characteristics. Journal of the Acoustical Society of America, 103(5), 2287-2295. doi: 10.1121/1.422747en
dc.identifier.doihttps://doi.org/10.1121/1.422747en
dc.identifier.issn0001-4966en
dc.identifier.urihttp://hdl.handle.net/10919/52601en
dc.identifier.urlhttp://scitation.aip.org/content/asa/journal/jasa/103/5/10.1121/1.422747en
dc.language.isoenen
dc.publisherAcoustical Society of Americaen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectAcoustic wave diffractionen
dc.subjectExcitation energiesen
dc.titleAperture synthesis of time-limited X waves and analysis of their propagation characteristicsen
dc.title.serialJournal of the Acoustical Society of Americaen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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