Water-loaded metal-dielectric wall diagonal horn antenna for hyperthermia application

In this paper, simulation study of a water-loaded metal-dielectric diagonal horn antenna in direct contact with phantom bio-medium (muscle) is presented. The proposed antenna is a new type of diagonal horn in which the major portion of the antenna walls is made of Lucite while remaining wall portion is made of metal, considering the region of the antenna from throat to aperture. The field over the aperture of the metal-dielectric diagonal horn corresponds to combination of a number of hybrid modes. The SAR and temperature distributions in the muscle-medium along with antenna input reflection coefficient and aperture electric field distribution across the antenna aperture were determined at 2.45 GHz and the results are compared with those due to the conventional metal diagonal horn of same aperture dimensions.