Chirp backscattering by pec sphere eccentrically placed in a dielectric sphere - Archive ouverte HAL
Article Dans Une Revue Journal of Quantitative Spectroscopy and Radiative Transfer Année : 2020

Chirp backscattering by pec sphere eccentrically placed in a dielectric sphere

Résumé

A plane electromagnetic (em) wave, amplitude- and frequency-modulated as a linear chirp, is incident on a dielectric sphere that hosts an eccentric, spherical, pec (perfect electric conductor) inclusion. This radiation problem is solved in the frequency domain by use of symmetry-dependent, spherical eigenvectors, the end-result being a set of linear equations for the wave amplitudes of the frequency spectrum of the electric field in every part of space. That set is solved by truncation and matrix-inversion, separately for even- and odd-symmetry wave amplitudes. The backscattered chirp is found by an inverse Fourier transform that yields the time-dependent, monostatic, radar cross section (mrcs). A numerical application manifests the possibility to detect a pec sphere concealed in an acrylic sphere by use of a wide-band chirp that targets a morphology-dependent resonance (mdr) of the composite body. Our theory and code are validated by use of a commercial software.
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Dates et versions

hal-03098646 , version 1 (30-01-2024)

Identifiants

Citer

Dimitrios Chrissoulidis, Elodie Richalot, Stéphane Protat. Chirp backscattering by pec sphere eccentrically placed in a dielectric sphere. Journal of Quantitative Spectroscopy and Radiative Transfer, 2020, 256, pp.107318. ⟨10.1016/j.jqsrt.2020.107318⟩. ⟨hal-03098646⟩
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