Communications: radio wave antennas – Antennas – Active sleeve surrounds feed line
Reexamination Certificate
2009-04-07
2011-10-11
Phan, David G (Department: 2821)
Communications: radio wave antennas
Antennas
Active sleeve surrounds feed line
C606S033000, C606S041000, C607S101000
Reexamination Certificate
active
08035570
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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Glassman Jonathan L.
Kim Steven
Lee Anthony C.
Prakash Mani N.
Rossetto Francesca
Phan David G
Vivant Medical Inc.
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