Microwave heating by using flat LHM lens

Microwave heating system for hyperthermia by using four flat LHM lenses orthogonally-deployed around the heating region is proposed and simulated. For the process of heating a 6mm-diameter tumor in homogeneous lossy dielectric medium, our 2-D FDTD simulations indicate that microwave energy can be concentrated tightly inside the tumor. Also the temperature distribution is derived through bio-heat equation (BHE), which has been solved by finite differential approach. Due to the admiring focusing properties of LHM lens, the temperature inside the tumor may rise from 37°C to more than 42.65°C during one hour with average input power density of 1.60 W/cm at 6GHz, while the temperature of normal tissue keeps well below 42°C as the requirement of hyperthermia.