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http://bura.brunel.ac.uk/handle/2438/23590
Title: | Diffuse field cross-correlations: Scattering theory and electromagnetic experiments |
Authors: | Davy, M Besnier, P del Hougne, P de Rosny, J Richalot, E Sarrazin, F Savin, DV Mortessagne, F Kuhl, U Legrand, O |
Issue Date: | 12-Oct-2021 |
Publisher: | American Physical Society (APS) |
Citation: | Davy, M., Besnier, P., del Hougne, P., de Rosny, J., Richalot, E., Sarrazin, F., Savin, D.V., Mortessagne, F., Kuhl, U., and Legrand, O. (2021) Physical Review E, 104 (4), 044204. doi: 10.1103/physreve.104.044204. |
Abstract: | The passive estimation of impulse responses from ambient noise correlations arouses increasing interest in seismology, acoustics, optics and electromagnetism. Assuming the equipartition of the noise field, the cross-correlation function measured with non-invasive receiving probes converges towards the difference of the causal and anti-causal Green’s functions. Here, we consider the case when the receiving field probes are antennas which are well coupled to a complex medium – a scenario of practical relevance in electromagnetism. We propose a general approach based on the scattering matrix formalism to explore the convergence of the cross-correlation function. The analytically derived theoretical results for chaotic systems are confirmed in microwave measurements within a mode-stirred reverberation chamber. This study provides new fundamental insights into the Green’s function retrieval technique and paves the way for a new technique to characterize electromagnetic antennas. |
URI: | https://bura.brunel.ac.uk/handle/2438/23590 |
DOI: | https://doi.org/10.1103/physreve.104.044204 |
ISSN: | 2470-0045 |
Other Identifiers: | 044204 |
Appears in Collections: | Dept of Mathematics Research Papers |
Files in This Item:
File | Description | Size | Format | |
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Preprint.pdf | 2.38 MB | Adobe PDF | View/Open |
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