High-strength microwave antenna assemblies

摘要

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.

主权项

1. A microwave antenna assembly comprising:
a proximal radiating portion having an inner conductor and an outer conductor separated by a dielectric layer; a distal radiating portion disposed distally of the proximal radiating portion, the inner conductor extending at least partially through the distal radiating portion; and an electrical choke disposed proximally of the distal radiating portion and including a conductive layer in electrical contact with the outer conductor, at least a portion of the conductive layer separated from the outer conductor by an inner dielectric layer.