2014/03/25 by Abdul Wahab, Wahab, Abdul, Amer Rasheed +5
Engineering · Mathematics · #35L05 #35R30 #47A52 #65J20 #FOS: Physical sciences #Geophysical Methods and Applications #Mathematical Physics (math-ph) #Microwave Imaging and Scattering Analysis #Numerical methods in inverse problems
paper · pdf · doi:10.48550/arxiv.1403.6463
openalex publication_date 2014/03/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The problem of reconstructing the spatial support of an extended radiating electric current source density in a lossy dielectric medium from transient boundary measurements of the electric fields is studied. A time reversal algorithm is proposed to localize a source density from loss-less wave-field measurements. Further, in order to recover source densities in a lossy medium, we first build attenuation operators thereby relating loss-less waves with lossy ones. Then based on asymptotic expansions of attenuation operators with respect to attenuation parameter, we propose two time reversal strategies for localization. The losses in electromagnetic wave propagation are incorporated using the Debye's complex permittivity, which is well-adopted for low frequencies (radio and microwave) associated with polarization in dielectrics.