Patent ID: 6635055
Filing Date: 2003-10-21
Classification: A61B,H01Q

Abstract:
A microwave applicator for applying electromagnetic radiation at microwave frequency, the applicator comprising:a waveguide with an outer waveguide wall enclosing dielectric material which extends beyond an output end of the waveguide wall to radiate microwave energy; and a coaxial input comprising an inner conductor and outer conductive sleeve surrounding said inner conductor for inputting a microwave signal of predetermined frequency at an input end of the waveguide, wherein the inner conductor extends from the outer conductive sleeve longitudinally within the waveguide wall into the dielectric material and terminates at a free end thereof within the dielectric material, and a lateral conductor is connected to, and extends laterally from, the inner conductor at a point within the dielectric material spaced a predetermined distance away from said free end so that the current flow in said inner conductor and lateral conductor launch microwaves in a fundamental mode within the dielectric material that travel to the output end of the waveguide.