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A metal-loaded helical slow-wave structure

A slow-wave structure and metal-loaded technology, which is applied to the coupling device of the transit time type electron tube, etc., can solve the problems of strong dispersion, high coupling impedance, narrow bandwidth, etc.

Active Publication Date: 2021-06-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

compared to figure 1 For the metal-loaded helical slow-wave structure, this metal-loaded method has strong dispersion, usually positive dispersion, so the bandwidth is relatively narrow, and the coupling impedance is high.

Method used

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  • A metal-loaded helical slow-wave structure
  • A metal-loaded helical slow-wave structure
  • A metal-loaded helical slow-wave structure

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Embodiment Construction

[0021] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0022] The principle of beam-wave interaction in the helical slow wave structure is that the electron beam exchanges energy with the longitudinal electric field generated by the electromagnetic wave propagating in the helix, and then realizes signal amplification. In a metal-loaded structure, the wider the bandwidth of the helical structure, the greater the proportion of metal loading, the longitudinal field distribution near the helix is ​​therefore reduced, and the coupling impedance is correspondingly reduced, for example figure 1 structure. In the present invention, in...

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Abstract

The invention discloses a metal-loaded helical slow-wave structure. A metal periodic diaphragm structure is loaded between a metal tube shell and a medium clamping rod. It is composed of a hollow disk, which is similar to a disk-loaded waveguide structure. In the region between two adjacent metal diaphragms of the metal periodic diaphragm structure, the longitudinal component of the electric field is relatively concentrated, which improves the phenomenon that the longitudinal electric field component near the helix decreases due to the loading of the metal strip loading structure, and then Increase the coupling impedance of the helix. In this way, on the basis of ensuring a large working bandwidth, the coupling impedance of the metal-loaded helical slow wave structure is also greatly improved, so that the output power of the helical TWT is further improved.

Description

technical field [0001] The invention belongs to the technical field of vacuum electronic devices, and more specifically relates to a beam-wave interaction structure of a traveling wave tube: a metal-loaded helical slow wave structure. Background technique [0002] The helical slow wave structure is widely used in military radar, electronic information countermeasures, satellite communications and other electronic devices that require broadband work. Compared with the coupled cavity traveling wave tube, the helical slow wave structure has weak dispersion and wide operating frequency, but its power capacity is relatively small. [0003] In a broadband helix, a commonly used method to reduce dispersion and widen the frequency range is to load metal fins. By changing the distribution of the longitudinal electric field, the phase velocity at the low-frequency end decreases rapidly or even becomes negative dispersion, thereby expanding the bandwidth. However, the existing metal-...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J23/42
CPCH01J23/42
Inventor 岳玲娜王仕荣苟茂松徐进赵国庆殷海荣王文祥魏彦玉
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA