Slow-wave structure having block supported helix structure

Abstract

The helix (10) of a slow-wave structure of a traveling wave tube is supported by a number of spaced dielectric blocks (34, 36) that are carried by a helical ribbon (26) in registry with the helix (10) itself. Registration of the ribbon (26) and its blocks (34, 36) with the helix structure (10) is facilitated by first winding a guide wire (40) in the spaces (16) between successive turns of the helix (10), to extend into and protrude radially outwardly from the spaces (16). After use of the guide wire (40) to align the ribbon-supported dielectric blocks (34, 36), the guide wire (40) is removed and the assembly of helix (10), blocks (34, 36) and supporting ribbon (26) is secured in its tubular envelope (20) by brazing, coining or heat-shrinking.

Dependencies are inferred from the claim text.