HIGH-STRENGTH MICROWAVE ANTENNA ASSEMBLIES
4 Assignments
0 Petitions
Accused Products
Abstract
Various high-strength microwave antenna assemblies are described herein. The microwave antenna has a radiating portion connected by a feedline to a power generating source, e.g., a generator. The antenna is a dipole antenna with the distal end of the radiating portion being tapered and terminating at a tip to allow for direct insertion into tissue. Antenna rigidity comes from placing distal and proximal radiating portions in a pre-stressed state, assembling them via threaded or overlapping joints, or fixedly attaching an inner conductor to the distal portion. The inner conductor is affixed to the distal portion by, e.g., welding, brazing, soldering, or by adhesives. A junction member made from a hard dielectric material, e.g., ceramic, can be placed between the two portions and can have uniform or non-uniform shapes to accommodate varying antenna designs. Electrical chokes may also be used to contain returning currents to the distal end of the antenna.
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Citations
30 Claims
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1-15. -15. (canceled)
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16. A microwave antenna assembly comprising:
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a feedline having an outer conductor; an electrical choke including; a conductive layer in electrical contact with the outer conductor of the feedline; and a first inner dielectric layer, at least a portion of the conductive layer separated from the outer conductor of the feedline by the first inner dielectric layer; and a radiating portion disposed distally of the electrical choke. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A microwave ablation system, comprising:
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an electrosurgical energy source; a microwave antenna assembly operatively connected to the electrosurgical energy source, the microwave antenna assembly including; a feedline having an outer conductor; an electrical choke including; a conductive layer in electrical contact with the outer conductor of the feedline; and a first inner dielectric layer, at least a portion of the conductive layer separated from the outer conductor of the feedline by the first inner dielectric layer; and a radiating portion disposed distally of the electrical choke. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification