Breast Cancer Hemispheric Shaped Hyperthermia System Designed with Compact Conformal Planar Antenna Array

Abstract

This paper describes the design of a novel 1.8 GHz hemispheric shaped hyperthermia system for clinical breast cancer treatment. The electromagnetic waves are focused in arbitrary locations with the aid of the Time Reversal (TR) technique. In this way a compact conformal planar antenna is designed to reduce mismatching between applicators and the breast tissue. The designed antenna presents 88% S-band fractional bandwidth for various kinds of breast tissues with different dispersion properties. It is shown that by employing an array of 16 antennas each carrying 1.5 W power, the tumour temperature can be increased to 43°C within 30 minutes of the heating process.