Microcoaxial Double Slot Antenna for Interstitial Hyperthermia: Design, Modeling and Validation

The effectiveness of hyperthermia is related to the temperature achieved during the therapy, as well as the length time of treatment and tissue characteristics. For the treatment of superficial tumors the radiation is applied through external antennas, while internal tumors are exposed to invasive applicators. To effectively treat deep-stead tumors, these antennas should produce a highly localized specific absorption rate pattern and be efficient radiators at different generator frequencies. In this work a double slot antenna for interstitial hyperthermia in muscle was designed using COMSOL Multiphysicstrade 3.3 and then was evaluated. According to the simulation and test validation, it is possible to increase near to 6 degrees Celsius temperature at a frequency of 2.45 GHz with a power level of 1 Watt.