A Minimally Invasive Dual-Slot Antenna for Microwave Hyperthermia Treatment

This work proposes a minimally invasive dual-slot antenna operating at 2.45 GHz for microwave hyperthermia treatment. The proposed antenna is based on a substrate-integrated coaxial line (SICL) and is characterized by the radiation structure of two slots at the end of the SICL. The slots are well-spaced to mitigate the backward current so that a localized ablation zone can be achieved. Besides, the proposed antenna has a small cross-section area and hence minimal invasiveness. A prototype of the antenna is fabricated and measured to show its effectiveness. Comparisons between simulation and experiment results are presented and analyzed. As a result, the proposed antenna can serve as a promising candidate for minimally invasive microwave ablation.