Patent Number: 8,574,227

Title: Tissue measurement and ablation antenna

Abstract: A surgical antenna for radiating microwave energy (e.g. frequency 500 MHz to 60 GHz) from a e.g. ceramic insertion tip (60) into biological tissue is disclosed. The tip is provided at the end of an elongate body which delivers the microwave energy to the tip via an inner conductor (30), an outer conductor (20) surrounding the inner conductor and a dielectric material (50) therebetween. The impedance of the insertion tip (60) is selected to improve impedance matching with the complex conjugate of the complex impedance of the tissue at a treatment frequency. For example the insertion tip may act as or include at least one quarter wavelength impedance transformer. By closely matching the antenna's impedance to the tissue, dynamic tuning (if used) can be performed much more efficiently. Impedance matching at the tip can also focus the radiated energy distribution.

Inventors: Hancock; Christopher Paul (Bristol, GB), White; Malcolm (Coleford, GB)

Assignee: Medical Device Innovations Limited

International Classification: A61B 18/18 (20060101)

Expiration Date: 1/05/12017