A kind of coaxial zigzag band-like injection slow-wave structure

Abstract

The invention discloses a coaxial zigzag strip-shaped injection slow wave structure, which includes a metal shell, a metal slow wave line and two dielectric support rods. The metal shell is divided into an inner layer and an outer layer. The channel is strip-shaped, and there is an opening at the bend between two adjacent ridges of the meandering waveguide structure; the metal slow wave line is obtained by folding a metal wire, and the folding path is the same as that of the meandering waveguide structure in the inner layer of the metal shell , set the same electron injection channel; two dielectric support rods are respectively fixed between the inner layer and the outer layer on both sides of the metal shell, part of the side of the dielectric support rod is exposed from the opening set on the meandering waveguide structure, and the metal slow wave line Surface contact is carried out to clamp the metal slow-wave line, so that the metal slow-wave line is suspended in the inner cavity of the metal shell. The invention can reduce the dispersion characteristic and improve the coupling impedance under the premise of ensuring a large bandwidth.

Description

technical field [0001] The invention belongs to the technical field of ribbon beam traveling wave tube slow wave system, and more specifically relates to a coaxial zigzag ribbon injection slow wave structure. Background technique [0002] As a microwave power device, traveling wave tubes have a very wide range of applications. For different application methods, traveling wave tubes have different characteristics. Generally speaking, traveling wave tubes have the advantages of wide frequency band, large power, and high gain. , high efficiency, large gain and long life, etc., but in most cases, a traveling wave tube cannot have all the advantages at the same time, but each has its own strengths. Traveling wave tubes with different advantages are applied to different field. [0003] The slow-wave structure is a device for strengthening the interaction between moving electrons and electromagnetic fields in traveling-wave electronic devices, so that the energy of electron flow c...

AI Technical Summary

Problems solved by technology

[0004] The traditional planar slow wave structure includes microstrip slow wave structure and strip slow wave structure, in which the electric field energy of the microstrip slow wave structure is mainly concentrated in its dielectric substrate, and with the decrease of the thickness of the dielectric substrate and the increase of its dielectric constant It is more and more obvious that there are disadvantages such as poor transmission characteristics and narrow bandwidth; while the dispersion of the banded slow wave structure has a large correlation with many structural parameters, and the dispersion is usually strong under the limitations of the existing processing conditions.

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