Radio-frequency-based catheter system with improved deflection and steering mechanisms

One of biological tissue's plastic the curve radiofrequency antenna insatllation (110) is ablation patient body vessel, comprising a end part (140) and long and thin pipe (150) and a pipe body (120). Coaxial angle between and outer conductor (640 and 660) of the casing pipe (120) is extended, and pipe (150) coaxial. Soft plastic the curve radiofrequency antenna (250) is flexible tube body (120) end part bearing, and a coaxial angle between and outer conductor (640 and 660) which. Soft plastic the curve radiofrequency antenna (250) is suitable for receiving and in the RF energy for melting biological tissue, and can (190) and for preparing (180) and is model the shape between the linear type, a of generating the curved ablation pattern with a a biological tissue the pipe body.