| 摘要 |
1,011,648. Travelling-wave tubes. C.S.F. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FILS. June 2, 1964 [June 12, 1963], No. 22715/64. Heading H1D. A delay line for a cross-field microwave tube which may have a meander pattern 7 is made by forming mutually displaced apertures 2, 3 and a terminal aperture 4 in a copper cylinder 1, these apertures being temporarily filled with a mouldable material. An insulating layer 5 of a material having good thermal conductivity, e.g. alumina or beryllium, is deposited on the exterior of the cylinder 1, this layer being machined to have a diameter slightly greater than the internal diameter of an outer copper cylinder 6, the unit 1, 5 being mounted in the cylinder by heating the latter to expand it. Finally, the ends of the assembly 1, 5, 6 are cut away to leave a length L and the mouldable material removed to leave the meander pattern 7 mounted on the layer 5 within the cylinder 6, Fig. 7. |
