An ablation probe (1； 100； 200), comprising: an applicator (2； 102； 202) arranged to apply radiation to heat surrounding tissue； a feeding cable (4； 104； 204) arranged to supply electromagnetic energy to the applicator. The feeding cable comprises a distal portion (2a, 202a) and a proximal portion (2b； 202b). The distal portion of the feeding cable has a distal cross sectional size and the proximal portion of the feeding cable has a proximal cross sectional size, wherein the distal cross sectional size is less that the proximal cross sectional size. The ablation probe further comprises a connector (24； 224) arranged to mechanically and electrically couple the distal portion (2a, 202a) of the feeding cable (2； 202) to the proximal portion (2b； 202b) of the feeding cable (2； 202). The connector comprises a joining member (12) comprising a proximal end (12b) shaped to receive an end of the proximal portion (2b； 202b) of the feeding cable and a distal end (12a) shaped to receive an end of the distal portion (2a； 202a) of the feeding cable.
