Apparatus and Systems for Liquid Metal-Based Tunable Coaxial Antenna for Microwave Ablation

Apparatus and systems of liquid metal-based tunable coaxial antenna for microwave ablation are described. Tunable antennas are capable of maintaining the optimal impedance matching in different organs of treatment as well as actively improving tissue heating during the course of the ablation. Efficient energy delivery to various tumor tissue and tissue conditions is critical in creating larger tumor margins and reducing the risk for local tumor progression. Efficient energy delivery can also help decrease the need for aggressive cooling mechanism from reflected power and antenna shaft heating. The tuning can be achieved by small physical motion of liquid metal plug actuated by pressure regulator.