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Complete waveguide bandwidth standard waveguide output high power helix TWT

A bandwidth standard, helical technology, applied in the direction of traveling wave tube, etc., can solve the problems of limited output power, difficult broadband, difficult to achieve broadband matching, etc., to achieve the effect of good matching performance

Inactive Publication Date: 2008-10-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] However, this power coupling output device has the following disadvantages: ①The end of the helix is ​​not directly connected to the shell through metal, so the heat dissipation is poor and the output power is limited; ②Bandwidth adjustment is difficult, and it is difficult to achieve broadband matching
At the same time, the symmetrical box window design of ordinary waveguide will inevitably cause ghost mode oscillation in the frequency band. It is difficult to obtain broadband output in high-power applications, and its relative bandwidth generally does not exceed 20%.
In fact, according to new investigations, there is no S-band helical traveling wave tube with this standard waveguide output at home and abroad.

Method used

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  • Complete waveguide bandwidth standard waveguide output high power helix TWT
  • Complete waveguide bandwidth standard waveguide output high power helix TWT
  • Complete waveguide bandwidth standard waveguide output high power helix TWT

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Embodiment Construction

[0018] Technical points of the present invention:

[0019] ① Local welding technology at the end of the helix uses four trapezoidal beryllium oxide ceramic clamping rods (generally three) to clamp the helix. The inner side of the clamping rod with the most serious heat generation is welded with the helical copper strip, and the outer side is welded with the oxygen-free copper outer conductor shell cooled by water, which realizes good thermal contact and improves the heat dissipation performance.

[0020] ② A transition structure composed of special-shaped metal strips and deformed waveguide walls is designed. This structure ensures the mode conversion and impedance matching from the helix to the standard waveguide within the full waveguide bandwidth. The standing wave coefficient is 1.26, and the helix The direct metal welding connection between the output end and the tube wall ensures good heat dissipation performance, making the microwave performance and heat dissipation per...

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Abstract

The invention relates to a full wave guide bandwidth standard wave output high power helical line traveling wave tube, which belongs to a field of microwave electric vacuum device. The high power helical line traveling wave tube includes a tube body, helical line arranged in the tube body, a holding bar, a flat wave guide and a microwave window, the flat wave guide and the helical line are connected by a helical line-ridge wave guide transition structure; the flat wave guide is connected with the microwave window by a flat wave guide-microwave window end joint wave guide transition section; and the microwave window is connected to a output end joint wave guide by a transition wave guide. The advantages of the invention are that output power level of the traveling wave tube is greatly increased in a standard wave guide bandwidth, and matching capability is good.

Description

technical field [0001] The invention relates to a high-power helical traveling wave tube output by a standard waveguide with full waveguide bandwidth, belonging to the technical field of microwave electric vacuum devices. Background technique [0002] High-power microwave electro-vacuum devices are the most important devices in modern defense and military equipment such as radar, electronic countermeasures, communications, and guidance. Among them, the helical traveling wave tube has attracted much attention due to its wide frequency band, high dynamic range, high efficiency, low noise and other advantages, and is widely used in various transmitter final power amplifiers. [0003] In some important applications, S-band broadband continuous wave high-power microwave sources are required. In order to meet this technical requirement, it is not only necessary to increase the single-tube output power of the helical TWT as much as possible, but also to combine the output power of...

Claims

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Application Information

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IPC IPC(8): H01J25/34
Inventor 汪海洋李家胤李明光
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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