Modeling of planar applicators for microwave thermotherapy

In order to improve the external applicators used for microwave thermotberapy controlled by microwave radiometry in medical applications, we propose specific planar applicators developed for heating: either annular ones to be used at the frequency equal to 915 MHz or in the shape of a horseshoe (short-circuited ring) for 434 MHz. The final goal of this paper is the realization of a honeycomb network for the treatment of larger areas and greater volumes. Index Terms--Finite-difference time-domain (FDTD) method, medical applications, microwave heating, microwave planar applicators.