Characterization and imaging with lamb wave lens at gigahertz frequencies

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buir.contributor.authorAtalar, Abdullah
buir.contributor.authorKöymen, Hayrettin
buir.contributor.orcidAtalar, Abdullah|0000-0002-1903-1240
dc.citation.epage1420en_US
dc.citation.spage1417en_US
dc.contributor.authorBozkurt, Ayhanen_US
dc.contributor.authorYaralıoğlu, Gökseninen_US
dc.contributor.authorAtalar, Abdullahen_US
dc.contributor.authorKöymen, Hayrettinen_US
dc.contributor.authorKramer, K.en_US
dc.coverage.spatialCannes, France
dc.date.accessioned2016-02-08T12:01:35Z
dc.date.available2016-02-08T12:01:35Z
dc.date.issued1994-10-11en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionDate of Conference: 31 Oct.-3 Nov. 1994
dc.descriptionConference name: 1994 Proceedings of IEEE Ultrasonics Symposium
dc.description.abstractLamb wave lenses with conical refracting surfaces are fabricated for use at 400 MHz and 1 GHz. The conical surfaces are ground and polished with mechanical means and they are sufficiently smooth for the frequencies of interest. The wide bandwidth of transducers allow frequency tuning necessary for Lamb wave lenses. The fabricated lenses show the expected V(Z) performance. At high frequencies the attenuation in the coupling medium can be very high, but due to the smaller wavelength the resolution is better and defocus distance can be reduced. Inherently higher leaky wave sensitivity of Lamb wave lens enables a good V(Z) characterization ability at higher frequencies as compared to the conventional spherical lens. Subsurface imaging with these Lamb wave lenses gives satisfactory results for layered structures. Chosen object has leaky wave modes within the angular coverage of the lens. The images exhibit a resolution close to the diffraction limit. Experimental V(Z) curves obtained with these lenses along with images are presented.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T12:01:35Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 1994en
dc.identifier.doi10.1109/ULTSYM.1994.401857en_US
dc.identifier.urihttp://hdl.handle.net/11693/27781
dc.language.isoEnglishen_US
dc.publisherIEEEen_US
dc.relation.isversionofhttps://doi.org/10.1109/ULTSYM.1994.401857en_US
dc.source.titleProceedings of the IEEE Ultrasonics Symposiumen_US
dc.subjectAttenuationen_US
dc.subjectBandwidthen_US
dc.subjectCharacterizationen_US
dc.subjectImaging techniquesen_US
dc.subjectMultilayersen_US
dc.subjectNatural frequenciesen_US
dc.subjectOptical resolving poweren_US
dc.subjectSurface wavesen_US
dc.subjectSurfacesen_US
dc.subjectTransducersen_US
dc.subjectConical refracting surfacesen_US
dc.subjectLamb wave lensesen_US
dc.subjectLeaky wave modesen_US
dc.subjectSubsurface imagingen_US
dc.subjectLensesen_US
dc.titleCharacterization and imaging with lamb wave lens at gigahertz frequenciesen_US
dc.typeConference Paperen_US

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