Patent ID: 7113832
Filing Date: 2006-09-26
Classification: A61B,H01Q

Abstract:
1. A co-axial microwave antenna for applications selected from a group comprised of interstitial, percutaneous, laparoscopic, endoscopic, and intrasurgery in medicine and surgery, and acute hyperthermia in oncology, wherein said antenna can be inserted into a metal needle for introduction into a target tissue, said antenna comprising: an inner conductor; a dielectric layer, wherein said dielectric layer coats said inner conductor substantially along its entire length; an external conductor that covers coaxially said dielectric layer except for an end portion of said dielectric layer; a choke mounted outside said external conductor near said end portion, said choke comprising a co-axial conducting portion of a diameter greater than said external conductor; and a conducting collar for connecting said co-axial conducting portion to said external conductor, said conducting collar being arranged along said co-axial conducting portion opposite to said end portion, wherein an inner surface of said needle acts as said co-axial conducting portion of said choke.