A dipole microwave applicator emits microwave radiation into tissue to be treated.The applicator is formed from a thin coax cable having an inner conductor surroundedby an insulator, which is surrounded by an outer conductor. A portion of the innerconductor extends beyond the insulator and the outer conductor. A ferrule atthe end of the outer conductor has a step and a sleeve that surrounds a portion ofthe extended inner conductor. A tuning washer is attached to the end of the extendedinner conductor. A dielectric tip encloses the tuning washer, the extended innerconductor, and the sleeve of the ferrule. The sleeve of the ferrule and the extendedinner conductor operate as the two arms of the dipole microwave antenna. The tuningwasher faces the step in the ferrule, and is sized and shaped to cooperate withthe step in balancing and tuning the applicator.
