Design Analysis of Microwave Ablation using Minimally Invasive Antenna in Human Liver

Microwave ablation (MWA) is a minimally invasive technique used to treat liver tumors by heating and destroying cancerous cells. In this work, we designed and analyzed a novel externally-tapped intertwined helical antenna for MWA. The antenna was tested on a tissue model using the High-Frequency Structure Simulator (HFSS), and the results showed a reflection coefficient S11 of −17.91dB and a gain of −0.86dB. T-rings were added to the outer conductors to reduce back current and increase the near spherical ablation zone. The proposed antenna has resonant mode at 5GHz and can provide transversal heating for tumor ablation. The results demonstrate the potential of the intertwined helical antenna for MWA applications.