Reciprocity theorem based phased array hyperthermia applicator design

A novel method based on reciprocity theorem is elaborated for the estimation of phased array hyperthermia applicator complex excitation currents. For this purpose a detailed numerical model of the structure is constructed including all tissues and the antennas as metallic scatterers. The structure is simulated with a virtual-test source at the tumor's center to yield the excitation currents at the port of the phased array through the corresponding scattering parameters. A simulation with these excitations verifies the focusing of electromagnetic energy over the tumor's area, which is improved by increasing the number of the array elements.