Design of 915 MHz Phased Conformal Antenna Array for Deep Tumor Hyperthermia Based on Realistic Breast Model and SAR Optimization

In this paper, we describe a specially designed 915MHz phased conformal patch antenna array for clinical deep breast tumor treatment. Firstly, its element is optimized near a realistic breast model, and a 20-element hemispherical conformal array is designed aiming for the specific absorption rate (SAR) within the tumor optimization. Then, the hyperthermia quality of the antenna array is evaluated for 10 mm tumors in radius within the breast under three depths, i.e., 65 mm (deep), 45 mm (medium), and 35 mm (shallow). Our simulation results showed that this array can heat the tumors to more than 43°C for the above three depths. Moreover, healthy tissue near the breast surface can be kept at a low temperature by using water. Based on this study, we conclude that this phased conformal antenna array has the potential for breast tumors hyperthermia.