Ultra-wideband planar dual-beam slow wave structure

Abstract

The invention discloses an ultra-wideband planar dual-beam slow wave structure. The ultra-wideband planar dual-beam slow wave structure comprises a planar metal slow wave wire, a metal shell and two dielectric support rods; the planar metal slow wave wire comprises straight metal lines and curved metal lines alternatively connecting the straight metal lines; extension sections are disposed on twoopposite side surfaces of the inner layer of the metal shell, and an opening is disposed between every two adjacent extension sections; the two dielectric support rods are fixed between the inner andouter layers on both sides of the metal shell; parts of the side surfaces of the dielectric support rods are exposed from the openings between the extension sections, are in surface contact with the curved metal lines of the planar metal slow wave wire, and clamp the planar metal slow wave wire to make the planar metal slow wave wire suspend within the inner cavity of the metal shell; each of theextension sections of each side surface of the inner layer extends into the corresponding opening facing the side surface, of the planar metal slow wave wire. The invention can reduce the dispersion characteristics 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 systems, and more specifically relates to an ultra-broadband planar double-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, the advantages of traveling wave tubes are bandwidth, high power, 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. Rather, each has its own strengths, and traveling wave tubes with different advantages are applied to different fields. [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 ...

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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