On Enhancing Efficiency of Transmission in Imaging Systems by Wearable Scatterers

The application of electromagnetic fields within biological tissues proves to be a powerful technology with a wide range of applications, including the monitoring of physiological parameters, microwave imaging, hyperthermia therapy and deep brain stimulation. In those cases, the maximization of the transmitted field is desired. Here, several solutions to enhance the trasnmitted electromagnetic field inside biological tissues are investigated. An exact solution to the problem of electromagnetic scattering of a plane-wave from an array of dielectric or conducting cylinders placed above a multilayer medium is presented. An analytical approach is considered to solve the scattered field by the cylinders in each medium through expansions into cylindrical waves, expressed through plane-wave spectra. The multilayer models the dielectric properties of biological tissues. Numerical results obtained at $f=2.4$ GHz are presented considering different configurations of the multilayer.