Wave field singularity aspects in large-size scatterers and inverse problems

Zaridze, R; Bit-Babik, G; Tavzarashvili, K; Economou, DP; Uzunoglu, NK

dc.contributor.author	Zaridze, R	en
dc.contributor.author	Bit-Babik, G	en
dc.contributor.author	Tavzarashvili, K	en
dc.contributor.author	Economou, DP	en
dc.contributor.author	Uzunoglu, NK	en
dc.date.accessioned	2014-03-01T01:18:28Z
dc.date.available	2014-03-01T01:18:28Z
dc.date.issued	2002	en
dc.identifier.issn	0018-926X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15031
dc.subject	Auxiliary absorbers	en
dc.subject	Auxiliary sources	en
dc.subject	Scattered field singularities	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Telecommunications	en
dc.subject.other	Electromagnetic wave diffraction	en
dc.subject.other	Electromagnetic wave scattering	en
dc.subject.other	Inverse problems	en
dc.subject.other	Numerical methods	en
dc.subject.other	Optimization	en
dc.subject.other	Auxiliary absorbers	en
dc.subject.other	Inverse scattering	en
dc.subject.other	Scattered field singularities	en
dc.subject.other	Directional patterns (antenna)	en
dc.title	Wave field singularity aspects in large-size scatterers and inverse problems	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/8.992561	en
heal.identifier.secondary	http://dx.doi.org/10.1109/8.992561	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	It is known that any scattered wave field carrying energy into infinity must have source singularity centers within a bounded space. Otherwise, the scattered field should be identically equal to zero everywhere [1]. In this paper, attention is paid to localization of these singularities under the assumption that every scattered wave is determined uniquely by its own singularities. Investigations have shown that these singularities are distributed as ""bright centers"" and the distance between them depends on frequency. To determine the position (localization) of the scattered wave field singularities, the functions describing converging and diverging waves are used. Based on these concepts and the method of auxiliary sources, an efficient numerical method to reconstruct a field up to its singularities is suggested. The localization of singularities is used for partial representation of the scattered fields, which reduces significantly the number of unknowns in describing the scattering process and leading into optimized inverse scattering problem solutions.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE Transactions on Antennas and Propagation	en
dc.identifier.doi	10.1109/8.992561	en
dc.identifier.isi	ISI:000174515400007	en
dc.identifier.volume	50	en
dc.identifier.issue	1	en
dc.identifier.spage	50	en
dc.identifier.epage	58	en