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ndltd-OhioLink-oai-etd.ohiolink.edu-osu12094935592021-08-03T05:53:34Z Ramp Response Signatures of Dielectric Scatterers Nag, Soumya K. <p>The concept of using the ramp response of a perfectly electrical conducting target to generate signatures, developed by previous researchers, is extended to dielectric (penetrable) targets. Transient scattered fields obtained from convex dielectric targets illuminated by a ramp incident waveform at an axial incidence have been shown to provide reasonable representations of the transverse physical cross section of most targets up to the shadow boundary. However, a much less accurate representation is obtained beyond the shadow boundary. But even then, it is still a useful representation. The signature can be the ramp profile function itself or target images which are generated from the ramp responses. The motivation that initiated these studies is to provide a Ground Penetrating Radar (GPR) signature for Anti-Personnel (A-P) land mines buried in the ground. Most A-P mines are inhomogenous dielectric bodies with varying metal content. Ramp response of homogeneous and inhomogeneous dielectric targets for cases where the ambient medium is free space, lossless, lossy dispersive and non-dispersive, and the dielectric constant of the target is smaller than that of the ambient medium, are included. The latter case can be applied as a signature of a buried A-P mine. The results contained in this dissertation are based on (a) scattering computation using an eigenfunction solution, and a Method of Moments (MoM) solution, (b) scattering measurements in The Ohio State University, ElectroScience Laboratory (OSU-ESL) Compact Range, and (c) measurements from a limited set of buried land mines using OSU-ESL GPR. The targets, presented in this dissertation, include (a) metallic and dielectric spheres, (b) rectangular metallic and dielectric blocks, and (c) actual land mines.</p> 1999 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1209493559 http://rave.ohiolink.edu/etdc/view?acc_num=osu1209493559 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
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| collection |
NDLTD
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| language |
English
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| sources |
NDLTD
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| author |
Nag, Soumya K.
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| spellingShingle |
Nag, Soumya K.
Ramp Response Signatures of Dielectric Scatterers
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| author_facet |
Nag, Soumya K.
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| author_sort |
Nag, Soumya K.
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| title |
Ramp Response Signatures of Dielectric Scatterers
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| title_short |
Ramp Response Signatures of Dielectric Scatterers
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| title_full |
Ramp Response Signatures of Dielectric Scatterers
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| title_fullStr |
Ramp Response Signatures of Dielectric Scatterers
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| title_full_unstemmed |
Ramp Response Signatures of Dielectric Scatterers
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| title_sort |
ramp response signatures of dielectric scatterers
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| publisher |
The Ohio State University / OhioLINK
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| publishDate |
1999
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| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1209493559
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| work_keys_str_mv |
AT nagsoumyak rampresponsesignaturesofdielectricscatterers
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| _version_ |
1719427272878850048
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