Abstract
A hyperthermia applicator for tumor treatment in the head and neck region is introduced. The system is based on an array of UWB, electrically small Vivaldi antenna. The antenna design has dimensions of 80 x 44 x 9.2 mm including the SMA attachments. The antenna is simulated with water background, and the simulation results under SEMCAD X environment shows a reflection coefficient less than 10 dB at a frequency range from 50 MHz to 3.75 GHz. Specific absorption rate (SAR) values of a simulated tumor in a head phantom model exposed to radiation from four antenna are presented. Investigation of the use of nanoparticles to control the electrical conductivity and permittivity of the tumor is presented.