Low-Frequency Electromagnetic Imaging Using Sensitivity Functions and Beamforming
Pierre-David Letourneau, Mitchell Tong Harris, Matthew Harper Langston, and George Papanicolaou
Publication Source: Society for Industrial and Applied Mathematics (SIAM) Journal on Imaging Sciences, Vol. 13, No. 2, pp. 807-843, May 2020
We present a computational technique for low-frequency electromagnetic imaging in inhomogeneous media that provides superior three-dimensional resolution over existing techniques. The method is enabled through large-scale, fast (low-complexity) algorithms that we introduce for simulating electromagnetic wave propagation. We numerically study the performance of the technique on various problems including the imaging of a strong finite scatterer located within a thick conductive box.