Dynamically matched microwave antenna for tissue ablation
AssigneeCovidien LP
InventorsCHRISTOPHER T. RUSIN, JOSEPH D. BRANNAN
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Abstract
A microwave ablation probe for providing microwave energy to tissue is disclosed. The probe includes a feedline having an inner conductor, a secondary inner conductor, and insulating spacer, and an outer conductor. The inner conductor is slidably disposed within the secondary inner conductor. The feedline also includes a radiating portion having an extruded portion of the inner conductor centrally disposed therein, wherein longitudinal movement of the inner conductor relative to the feedline tunes the radiating portion.
Claims14
(canceled)
A microwave ablation probe, the probe comprising:
- a feedline including an inner conductor and an outer conductor, and an insulating spacer disposed between the inner and outer conductors, the inner conductor including a slidable conductor disposed within a tubular conductor, the slidable conductor being longitudinally movable relative to the tubular conductor while maintaining electro-mechanical contact with the tubular conductor;
- and
- a radiating portion coupled to the feedline and including at least a portion of the slidable conductor disposed therein.
A microwave ablation probe for providing microwave energy to tissue, the probe comprising:
- a feedline including an inner conductor and an outer conductor, and an insulating spacer disposed between the inner and outer conductors, the inner conductor including a slidable conductor disposed within a tubular conductor, the slidable conductor being longitudinally movable relative to the tubular conductor while maintaining electro-mechanical contact with the tubular conductor;
- a radiating portion coupled to the feedline and including at least a portion of the slidable conductor disposed therein;
- and
- at least one loading including a direct current (DC) electric field-dependent dielectric material, wherein at least one dielectric property of the DC electric field-dependent dielectric material varies in response to the DC electric field supplied thereto.
Dependencies are inferred from the claim text.