Method for manufacturing coupled cavity travelling wave tubes

Details Method for manufacturing coupled cavity travelling wave tubes Method for manufacturing coupled cavity travelling wave tubes

1983-10-05

1986-10-28

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Electrical device making

315 36, H01P 1100, H01Q 1300

Patent

active

046190414

ABSTRACT:
A millimeter coupled cavity travelling wave tube has each of its slow wave structures formed of at least one longitudinally extending member having holes made therethrough by a hobbing process, which holes constitute at least in part the cavities of the slow wave structure. In a preferred embodiment a one and one only such longitudinally extending member is provided, the holes therein each a whole cavity. The hobbing is such that a buttress is left outstanding from each cavity facing surface of a cavity separating wall and the beam hole is bored axially through said member from end to end through said buttresses. After machining of the cavity coupling holes in the cavity separating walls (e.g. by spark erosion) the cavities are closed by plates brazed to opposite faces of the member.

REFERENCES:
patent: 3636402 (1972-01-01), Horigome
patent: 3678575 (1972-07-01), Akeyama et al.
patent: 3684913 (1972-08-01), James et al.
patent: 4129803 (1978-12-01), Friz
patent: 4143341 (1979-03-01), Gross
"Waveguide Components", by D. J. Doughty, Journal Brit. I.R.E. (Feb. 1961) pp. 169, 176, 177, 179.
"How Cold Hobbing Shapes Intricate Parts", by Alex Phillips, The Iron Age (Apr. 3, 1958) pp. 91-93.

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