Microwave antenna with choke

摘要

According to one aspect of the present disclosure, a microwave antenna assembly is disclosed. The antenna assembly includes a feedline having an inner conductor, an outer conductor and an inner insulator disposed therebetween and a radiating portion including a dipole antenna having a proximal portion and a distal portion. The antenna assembly also comprises a sheath disposed over the feedline and the radiating portion defining a chamber around the feedline and the radiating portion. The chamber is adapted to circulate coolant fluid therethrough. The antenna assembly further includes a connection hub having cable connector coupled to the feedline, an inlet fluid port and an outlet fluid port. The connection hub includes a bypass tube configured to provide for flow of the coolant fluid from the cable connector directly to the outlet fluid port.

主权项

1. A microwave antenna assembly comprising:
a feedline configured to deliver microwave energy to tissue, the feedline including an inner conductor, an outer conductor, and an inner insulator disposed between the inner conductor and the outer conductor; a dielectric layer formed circumferentially about at least a portion of the outer conductor; a conductive layer formed circumferentially about at least a portion of the dielectric layer, at least a portion of the conductive layer electrically coupled to a portion of the outer conductor of the feedline, wherein the dielectric layer and the conductive layer limit transmission of microwave energy in a proximal direction; and a fluid inflow tube disposed circumferentially about the feedline and defining a fluid inflow conduit between the feedline and the fluid inflow tube such that the feedline is disposed within the fluid inflow conduit.