Patent ID: 8945111
Filing Date: 2015-02-03
Classification: A61B,H01Q

Abstract:
1. A microwave antenna assembly comprising: a feedline including an inner conductor, an outer conductor and an inner insulator disposed therebetween; and a radiating portion including an unbalanced dipole antenna having a proximal portion and a distal portion of different lengths and a gap therebetween, the gap disposed off-center of the unbalanced dipole antenna and configured to provide an impedance match between the unbalanced dipole and initial and real part impedance of tissue, wherein the proximal portion includes at least a portion of the inner conductor and the inner insulator and the distal portion includes a conductive member, wherein the assembly further comprises a choke disposed around at least a portion of the feedline, the choke including an inner dielectric layer and an outer conductive layer, wherein a distal end of the inner dielectric layer is disposed between a distal end of the outer conductive layer and the gap.