| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve assembling accuracy of a loading element and a helix. <P>SOLUTION: A helix type traveling-wave tube comprises a cylindrical envelope 9, an electron gun mounted at one end of the envelope 9 and radiating electron beam inside the envelope, and a collector mounted at the other end of the envelope 9 and collecting electrons of the electron beam. Plural vanes 14 are formed on an inner face of the envelope 9 in parallel to a shaft of the envelope 9 and integrally with the envelope 9. A helix 4 is arranged inside the envelope 9 coaxially with the envelope 9. The helix 4 is supported away from the envelope 9 by three or more supports 8 interposed between an outer periphery of the helix 4 and the inner face of the envelope 9 away from the vanes 14. Then, an inside diameter of the envelope 9 and an outside diameter of a circle to which the three or more supports 8 are inscribed has a shrink fitting relationship. <P>COPYRIGHT: (C)2013,JPO&INPIT |
