Patent ID: 8747398

Claim:
A system for tissue ablation, comprising: a microwave antenna configured for direct insertion into a targeted tissue; a microwave energy generator coupled to the microwave antenna and configured to provide microwave energy of a predetermined frequency and having a generator impedance; an input line for receiving at least one of an output signal and microwave energy from the microwave energy generator; an output line for transmitting at least one of an impedance matched output signal and microwave energy to the microwave antenna; and an active matching network, including: a fixed inductor electrically connected in series between the input line and the output line; a first capacitor and a first tuning diode electrically connected in series to one another and connected to the input line at a location upstream of the fixed inductor; a second capacitor and a second tuning diode electrically connected in series to one another and connected to the output line at a location downstream of the fixed inductor; a first inductor connected to a first direct current source via a first supply line and connected at a point between the first capacitor and the first tuning diode; and a second inductor connected to a second direct current source via a second supply line and connected at a point between the second capacitor and the second tuning diode, wherein the first and second tuning diodes are selectively switchable from an off state to an on state to place at least one of the first capacitor and the second capacitor in an active state with the fixed inductor to compensate for a difference between the generator impedance and an impedance of the targeted tissue.