摘要: Starting from the basic electromagnetic theory, the radiation characteristic of eight-slot leaky coaxial cable is studied, the existing condition of radiation mode is given, and the frequency bandwidth of the single-mode radiation... 展开 Starting from the basic electromagnetic theory, the radiation characteristic of eight-slot leaky coaxial cable is studied, the existing condition of radiation mode is given, and the frequency bandwidth of the single-mode radiation is discussed. In this paper, authors point out that the cable does not have radiation wave of even mode but only have wave of odd mode such as-1, -3, -5 and so on. A series of new slots can be opened at the outer conductor of the cable where the distance between the new slot and old ones is P/2n where n must be odd number and it should be equal or less than -3. Consequently, the corresponding high-order mode is restrained and the frequency bandwidth of the single-mode radiation is extended. The conclusions have an important meaning to the design and use of eight-slot leaky coaxial cable. 收起