Welding helix structure of traveling-wave tube

Abstract

The invention discloses a welding helix structure of a traveling-wave tube. The welding helix structure of the traveling-wave tube comprises a helix, slow-wave transition bars, a tube and clamping blocks of block-shaped structures; the slow-wave transition bars and the helix are positioned in the tube and are axially arranged along the inner part of the tube, and the helix and the tube are coaxial; the slow-wave transition bars are positioned between the helix and the tube; the clamping blocks are positioned between the slow-wave transition bars and the helix; the contact surfaces of the clamping blocks and the slow-wave transition bars as well as the helix are coated with platable metal; the clamping blocks and the slow-wave transition bars and the helix are welded together by the platable metal; the clamping blocks are distributed at intervals of at 120 degrees along the direction of the circumference of the cross section of the helix; and the adjacent clamping blocks at the axis direction of the helix are not connected mutually. The traveling-wave tube of the welding helix structure relieves the load, increases the coupling impedance, and improves the electronic efficiency.

Description

technical field [0001] The invention relates to a microwave device, in particular to a welding spiral structure of a traveling wave tube. Background technique [0002] Traveling wave tube is a microwave electric vacuum power device, which mainly plays the role of final stage amplification in microwave signal system, and has a wide range of applications. Traveling wave tube has the characteristics of wide frequency range, high gain, large dynamic range and low noise, and has become an important microwave device for electronic equipment such as radar, electronic countermeasures, relay communication, satellite communication, live TV satellite, navigation, remote sensing, remote control, and telemetry. . The slow wave part of the traveling wave tube will generate heat due to a small amount of irregular electrons. If this part of the heat cannot be effectively transmitted and dissipated, it will have an adverse effect on the working environment of the traveling wave tube and aff...

AI Technical Summary

Problems solved by technology

The slow wave part of the traveling wave tube will generate heat due to a small amount of irregular electrons. If this part of the heat cannot be effectively transmitted and dissipated, it will have an adverse effect on the working environment of the traveling wave tube and affect the working stability of the traveling wave tube. In severe cases It will also damage the traveling wave tube. Therefore, the heat dissipation of the slow wave is very important. The welding helix structure of the slow wave part of the existing traveling wave tube can make the distance between the helix and the clamping rod, between the clamping rod and the shell The thermal resistance is reduced, thereby improving the heat dissipation capacity of the slow wave, but the welding helix structure of most existing traveling wave tubes is a structure welded with the helix and the slow wave transition strip through the clamping rod, and the traveling wave of this structure The tube can improve the heat dissipation capacity of the slow wave, but it affects the electronic interaction efficiency of the traveling wave tube, which in turn affects the electronic efficiency of the whole tube of the traveling wave tube

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