Mitigation of coupling in RF Tomography with applications to belowground sensing

In imaging applications based on RF Tomography, coupling between transmitters and receivers is a principal technical challenge to be overcome. To mitigate the coupling, we propose to activate different transmitters simultaneously, and determine their respective current source distribution in order to create electric field nulls at desired points (e.g., the receivers). The current design problem must take into consideration physical and system constraints of the radiators. As such, the current design must be formulated as a nonlinear programming problem. These constraints are discussed in details, and our method is validated using FDTD simulations.