Core bar for high-pitch precision spiral line and manufacturing method of core bar

Abstract

The invention discloses a core bar for a high-pitch precision spiral line and a manufacturing method of the core bar. The core bar comprises a process section (1), a porous structure (2), a spiral line coiling section (3), a planar structure (4) and a process section (1), wherein the spiral line coiling section (3) is positioned in the middle position; one end of the spiral line coiling section (3) is of the porous structure (2), the other end of the spiral line coiling section (3) is of the planar structure (4), and the other end of the porous structure (2) and the other end of the planar structure (4) are the process sections (1); and the diameter of each process section (1) is same as that of the spiral line coiling section (3), and the outer circumference surfaces of each process section (1) and the spiral line coiling section (3) are provided with coatings (5). According to the core bar for the high-pitch precision spiral line, with the special structure, in the axial direction of the core bar, one end of the core bar is of the porous structure, and a strip material of the spiral line is inserted into a hole and begins to be coiled when the spiral line is coiled; and after coiling is finished, the spiral line can be fixed by a step of the planer structure at the other end, and thus the problem of fixing the spiral line during coiling is solved.

Description

technical field [0001] The invention relates to the field of manufacturing slow wave components of traveling wave tubes in microwave electric vacuum, in particular to a core rod for a high-pitch precision helical wire and a manufacturing method of the core rod. Background technique [0002] In the field of microwave and electric vacuum, the traveling wave tube is the best device that combines bandwidth and gain. Among them, the helical traveling wave tube is the most widely used, and its high-frequency circuit is generally a helical wire or metal strip. Three or more dielectric rods are clamped and fixed in the metal tube shell. The basic function of the helical wire is to provide a high-frequency electromagnetic wave with an axial propagation speed close to the electron motion speed and a sufficiently strong axial electric field, so that the electromagnetic wave interacts with the electron beam to amplify the signal. The metal wire is called a helix, which is the carrier o...

AI Technical Summary

Problems solved by technology

Existing core rods and their manufacture are still unable to meet the above process requirements

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