#$%^&*AU2014204553A120140807.pdf#####ABSTRACT A microwave antenna assembly (300) comprising: an introducer (316) having a first lumen (316a) defined therein an elongate shaft (312) disposed within the introducer 5 (316), the elongate shaft (312) having a second lumen defined therein a conductive member (314) at least partially disposed within the second lumen of the elongate shaft (312), the conductive member (314) including a distal end (336) configured to penetrate tissue a first dielectric material (328) disposed between the elongate shaft (312) and at least a portion of the conductive member (314) and a second dielectric material (362) 10 that covers at least a portion of the conductive member (314) wherein the conductive member (314) is selectively movable relative to a distal end of the introducer (316) from a first configuration wherein the distal end (336) of the conductive member (314) at least partially abuts a distal end of the introducer (16) to a second configuration wherein the distal end (336) of the conductive member (314) is spaced relative to the distal end of the is introducer (316).
