ELECTROMAGNETIC IMAGING FOR LARGE STORAGE BINS USING FERRITE LOADED SHIELDED HALF-LOOP ANTENNAS

In one embodiment, a method implemented by an electromagnetic imaging system for imaging material within a metal container, the method comprising: transmitting to, and receiving signals from, plural antennas attached to an interior wall of the metal container, the signals delivered over a plurality of channels, each of the plural antennas comprising a ferrite loaded, shielded half-loop antenna; measuring a plurality of scattering parameters (S-parameters) for all of the plurality of channels; calibrating the measurements; and providing an image of the material using an inversion algorithm based on the calibrated measurements.