Step-down coaxial microwave ablation applicators and methods for manufacturing same
First Claim
1. A microwave ablation applicator comprising:
- a feed-line segment including a first inner conductor, a first dielectric disposed on an outer surface of the first inner conductor and having a first face in a plane perpendicular to a longitudinal axis of the first inner conductor, and a first outer conductor disposed on the outer surface of the first dielectric;
a step-down segment adjacent to a distal end portion of the feed-line segment and including a second inner conductor, a second dielectric having a diameter less than a diameter of the first dielectric and disposed on the outer surface of the second inner conductor, and a second outer conductor disposed on the outer surface of the second dielectric; and
a radiator base segment adjacent to a distal end portion of the step-down segment and including a third inner conductor, a third dielectric having a diameter less than the diameter of the first dielectric and disposed on the outer surface of the third inner conductor, a third outer conductor disposed on the outer surface of a proximal end portion of the third dielectric so as to form a feed gap at a distal end portion of the radiator base segment, a balun dielectric disposed on the outer surface of the third outer conductor, and a balun outer conductor disposed on the outer surface of the balun dielectric, the third outer conductor having a length that is less than a length of the third dielectric so as to form the feed gap,wherein a length of the step-down segment is based on a wavelength of an operation frequency of the microwave ablation applicator,wherein the balun outer conductor is directly connected to a proximal end portion of the third outer conductor,wherein the step-down segment includes multiple steps, andwherein a ferrule is disposed at each of the steps of the step-down segment.
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Accused Products
Abstract
Microwave ablation applicators and methods for manufacturing the microwave ablation applicators are disclosed. A microwave ablation applicator includes a feed-line segment, a step-down segment, and a radiator base segment. The feed-line segment includes a first inner conductor, a first dielectric disposed on the first inner conductor, and a first outer conductor disposed on the first dielectric. The step-down segment includes a second inner conductor, a second dielectric disposed on the second inner conductor, and a second outer conductor disposed on the second dielectric. The radiator base segment includes a third inner conductor disposed on the third inner conductor, a third outer conductor disposed on the proximal end of the third dielectric so as to form a feed gap at a distal end of the radiator base segment, a balun dielectric disposed on the third outer conductor, and a balun outer conductor disposed on the balun dielectric.
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Citations
11 Claims
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1. A microwave ablation applicator comprising:
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a feed-line segment including a first inner conductor, a first dielectric disposed on an outer surface of the first inner conductor and having a first face in a plane perpendicular to a longitudinal axis of the first inner conductor, and a first outer conductor disposed on the outer surface of the first dielectric; a step-down segment adjacent to a distal end portion of the feed-line segment and including a second inner conductor, a second dielectric having a diameter less than a diameter of the first dielectric and disposed on the outer surface of the second inner conductor, and a second outer conductor disposed on the outer surface of the second dielectric; and a radiator base segment adjacent to a distal end portion of the step-down segment and including a third inner conductor, a third dielectric having a diameter less than the diameter of the first dielectric and disposed on the outer surface of the third inner conductor, a third outer conductor disposed on the outer surface of a proximal end portion of the third dielectric so as to form a feed gap at a distal end portion of the radiator base segment, a balun dielectric disposed on the outer surface of the third outer conductor, and a balun outer conductor disposed on the outer surface of the balun dielectric, the third outer conductor having a length that is less than a length of the third dielectric so as to form the feed gap, wherein a length of the step-down segment is based on a wavelength of an operation frequency of the microwave ablation applicator, wherein the balun outer conductor is directly connected to a proximal end portion of the third outer conductor, wherein the step-down segment includes multiple steps, and wherein a ferrule is disposed at each of the steps of the step-down segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification