Metal working – Method of mechanical manufacture – Electrical device making
Patent
1986-04-03
1988-08-23
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
Electrical device making
315 35, H01J 900
Patent
active
047650567
ABSTRACT:
A waveguide helical slow-wave structure is formed of a solid rod of copper machined with a deep, narrow helical groove. A copper sleeve is brazed to the periphery of the resulting helical thread to form a helically spiraling pathway about a solid axially centered and axially extending center portion. The center portion is then partially eroded away to form a slow wave structure having a helical radially-extending portion with an inner helical axially-extending ridge to provide a helical axially-centered gap between adjacent ridges. The slow wave structure contains the microwave energy which follows the spiral path of the structure and produces RF voltage across the gap of adjacent portions of the ridges to thereby form a gapped-wall surrounding an axially-extending hole for gap electric field interaction with the axial electron beam of a traveling wave tube of which the slow wave structure is a part.
REFERENCES:
patent: 3376463 (1968-04-01), Feinstein
patent: 4185225 (1980-01-01), Doehler et al.
patent: 4229676 (1980-10-01), Manoly
patent: 4268778 (1981-05-01), Friz
patent: 4347419 (1982-08-01), Jasper, Jr.
Harper Robert
Rousseau Joseph L.
Goldberg Howard N.
Raytheon Company
Ross Taylor J.
Santa Martin M.
Sharkansky Richard M.
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