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Communication dans un congrès

Gaussian beam summation method vs. Gaussian beam launching in high-frequency RCS of complex radar targets

Papa Ousmane Leye 1, 2 Ali Khenchaf 1, 2 Philippe Pouliguen 3
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
ENSTA Bretagne - École Nationale Supérieure de Techniques Avancées Bretagne
Abstract : The problem of Gaussian beam propagation is of significant interest for many physical disciplines, including optics, geophysics, and acoustics. Individual Gaussian beams are asymptotic solutions of Helmholtz's equation. Since they are insensitive to ray transition region, several techniques based on Gaussian beam are used to evaluate high frequency EM wave equation, which overcome partially or fully the difficulties of singular regions (caustics, zero field in shadow zones). We compare two different accurate and approximate representations for the scattered electromagnetic field from canonical and complex targets, given in terms of Gaussian beam. The Gaussian beam launching technique (GBL) consist of representing the scattered field by a set of Gaussian beams which strike the target surface from where they are reflected, and also diffracted by the target edge. In the Gaussian beam summation (GBS) approach the complete wave field at a receiver is evaluated as superposition Gaussian beams concentrated close to rays emerging from the target, passing in the neighborhood of the receiver.
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Contributeur : Annick Billon-Coat <>
Soumis le : vendredi 1 décembre 2017 - 12:12:20
Dernière modification le : mercredi 24 juin 2020 - 16:19:51



Papa Ousmane Leye, Ali Khenchaf, Philippe Pouliguen. Gaussian beam summation method vs. Gaussian beam launching in high-frequency RCS of complex radar targets. IGARSS 2016, Jul 2016, Beijing, China. ⟨10.1109/IGARSS.2016.7729679⟩. ⟨hal-01653326⟩



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