Quasi-coaxial zigzag sheet beam slow-wave structure

Abstract

The invention discloses a quasi-coaxial zigzag sheet beam slow-wave structure, which comprises a metal shell, a metal slow-wave line and two dielectric support rods, wherein the metal shell is dividedinto an inner layer and an outer shell, the inner layer adopts a zigzag waveguide structure, an electron beam channel is strip-shaped, the bending between two adjacent ridge sheets of the zigzag waveguide structure is provided with an opening; the metal slow-wave line is obtained by folding a metal line, the folding path is the same as the folding path of the zigzag waveguide structure of the inner layer of the metal shell, and an identical electron beam channel is set; and the two dielectric support rods are respectively fixed between the inner layer and the outer layer at two sides of the metal shell, and the side surfaces of the dielectric support rods are partially exposed from the openings set on the zigzag waveguide structure and performs surface contact with the metal slow-wave line so as to clamp the metal slow-wave line and enable the metal slow-wave line to be suspended in an inner cavity of the metal shell. The quasi-coaxial zigzag sheet beam slow-wave structure can reducethe dispersion characteristics and improve the coupling impedance under the premise of ensuring high 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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