PROBLEM TO BE SOLVED: To provide a coaxial cable equipped with an external conductor and an internal conductor which are adapted so as to be connected to an energy source for processing constituents, and to provide a first and a second dielectric materials arranged between the internal conductor and the external conductor, with the dielectric materials for positioning the internal conductor being in a substantially coaxial relation to the external conductor.SOLUTION: The coaxial cable is provided with an external conductor and an internal conductor which are adapted so as to connect with an energy source, and a first and a second dielectric materials arranged between the internal conductor and the external conductor and positioning the internal conductor at a first position with respect to the external conductor. The first dielectric material has a first thermal expansion coefficient, and the second dielectric material has a second thermal expansion coefficient which is different from the first.COPYRIGHT: (C)2009,JPO&INPIT【課題】組織を処置するためにエネルギー源に接続するように適合された外部導体および内部導体と、内部導体と外部導体との間に配置される第一および第二の誘電材料とを備え、これらの誘電材料が、内部導体を外部導体に対してほぼ同軸関係に位置決めする同軸ケーブルを提供すること。【解決手段】エネルギー源に接続するように適合された外部導体および内部導体と;内部導体を外部導体に対して第一の位置に位置決めする、内部導体と外部導体との間に配置される第一および第二の誘電材料とを備える同軸ケーブルであって、第一の誘電材料は第一の熱膨張係数を有し、第二の誘電材料は第一の熱膨張係数とは異なる第二の熱膨張係数を有する。【選択図】なし