Electro-Acoustic Scattering using Finite Difference Time Domain Method (FDTD)

Rupa, V.Viswa; Negi, Yoginder Kumar; Balakrishnan, N.

doi:10.1109/mapcon56011.2022.10047716

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2023

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“…In this paper, the work is built upon our previous paper [31] and extends our investigation to higher frequencies and a greater number of unknowns, and delves into the exploration of Bragg scattering, as detailed in the next section.…”

Section: Numerical Approachmentioning

confidence: 99%

Electro-Acoustic Scattering From a Pulsating Sphere

Negi,

Balakrishnan

2023

IEEE J. Multiscale Multiphys. Comput. Tech.

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In this paper, we show the RCS enhancement due to the acoustic disturbances around a pulsating sphere. The acoustic variation is modelled with the dielectric inhomogeneities around the sphere caused by the pressure fluctuations due to the acoustic source. RCS is computed for the modelled dielectric pulsating sphere, a cube and a cone on a cylinder across a frequency band using Finite Difference Time Domain (FDTD) method. The RCS of the pulsating sphere and other objects considered are dominated by the background scattering from the pulsating object. In this work, we show that the dielectric variation due to the acoustic source can be detected even if there is no scattering from the object . The scattering from the dielectric variation leads to the detection of Bragg scattering along with a significant increase in RCS.

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Section: Numerical Approachmentioning

confidence: 99%