A microwave ablation system configured for use in luminal network is provided. The heat dissipation body includes a central portion defining a through hole therein and a plurality of fin extending from a periphery of the central portion. The duplicate data is mapped to a modulation symbol having a different size or phase as that of the original data, thus to reduce the PAPR unlike the general repetition coding. The fuser can thus have a simple structure formed of a reduced number of components and enhancing workability and facilitating its fabrication.