A directional ablation instrument for ablation of a targeted tissue. The instrument includes a transmission line having a proximal portion suitable for connection to an electromagnetic energy source, and an elongated antenna device having a longitudinal axis and an end coupled to the transmission line....http://www.google.ca/patents/US7115126?utm_source=gb-gplus-sharePatent US7115126 - Directional microwave ablation instrument with off-set energy delivery portion
