Conference
Recent advances in the Incremental Theory of Diffraction for Complex Source Point illumination
| العنوان: | Recent advances in the Incremental Theory of Diffraction for Complex Source Point illumination |
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| المؤلفون: | TOCCAFONDI, ALBERTO, Canta S. M, Erricolo D. |
| المساهمون: | Toccafondi, Alberto, Canta S., M, Erricolo, D. |
| سنة النشر: | 2011 |
| المجموعة: | Università degli Studi di Siena: USiena air |
| الوصف: | The accurate prediction of the far field radiated or scattered by large structures, such as large reflector antennas, requires efficient techniques for representing the illuminating field. Complex Source Points (CSP) inherently contain information about the source directivity, hence they can be used as the basis function to expand a given, but arbitrary, radiating wave field [1-3], such as the field incident on an antenna or a more general complex structure. As a consequence, a CSP field representation, when combined with the analytic continuation in complex space of typical ray-techniques such as the Geometrical and the Uniform Geometrical Theory of Diffraction (GTD/UTD), may provide a very efficient tool to estimate the fields radiated by large objects [4]. In this framework, an extension of the Incremental Theory of Diffraction (ITD) formulation for the scattering by wedges illuminated by CSP has been introduced [5], which essentially overcomes the typical impairments of the GTD/UTD ray techniques associated with possible ray caustics and with the difficulties of ray tracing in complex space. On the other hand, when dealing with the description of the field radiated by large structures, many of the existing electromagnetic codes resort to a Physical Optics (PO) representation also with an arbitrary incident field. It is however well known that the PO approach does not always produce accurate field predictions [6]. A significative augmentation of the PO field estimate can be achieved by including along the structure's edges a line integration of an incremental fringe field, that acts as a correction term for the field estimate. Several techniques have been published to derive these elementary contributions, leading to Physical Theory of Diffraction (PTD), Elementary Edge Waves/Incremental Length Diffraction Coefficient (EEW/ILDC), and ITD. In this work we discuss some recent advances in the incremental formulation for the field diffracted by edges in perfect electric conductor (PEC) objects when illuminated by ... |
| نوع الوثيقة: | conference object |
| وصف الملف: | STAMPA |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/isbn/978-142445117-3; ispartofbook:2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011; 2011 XXXth URSI General Assembly and Scientific Symposium; volume:Article number 6050246; firstpage:1; lastpage:4; numberofpages:4; http://hdl.handle.net/11365/442123; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-81255124216 |
| DOI: | 10.1109/URSIGASS.2011.6050246 |
| الاتاحة: | http://hdl.handle.net/11365/442123 https://doi.org/10.1109/URSIGASS.2011.6050246 |
| رقم الانضمام: | edsbas.BB8A41AB |
| قاعدة البيانات: | BASE |
| DOI: | 10.1109/URSIGASS.2011.6050246 |
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