Helix slow wave structure

A technology of slow-wave structure and helix, applied in the field of slow-wave structure, can solve the problems of difficult general application, complex process, expensive price, etc., and achieve the effect of improving performance, improving heat capacity and reliability, and improving heat dissipation capacity

Inactive Publication Date: 2012-05-09
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is more complex and expensiv

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  • Helix slow wave structure
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  • Helix slow wave structure

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Embodiment Construction

[0023] A helical slow-wave structure, such as Figure 3-5 As shown, it includes a helix 6, a tube shell 1 and three medium holding rods 2. The inner diameter of the helix 6 is a, the outer diameter is b, and the pitch is p, and it is wound from a strip metal wire with a rectangular cross section; wherein the length of the rectangular cross section is s=b-a, the width is w, and s / w≥1; the outer surface of the helix 6 is provided with 3 rectangular grooves parallel to the central axis of the helix and evenly distributed; The inner surface is compatible, and the shape of the side surface in contact with the helix 6 is adapted to the shape of the groove on the outer surface of the helix 6, so that the medium clamping rod 2 can fix the helix 6 inside the shell 1 and keep both The central axis is consistent.

[0024] The material of the slow-wave structure helix is ​​molybdenum, the material of the shell is stainless steel, and the material of the clamping rod is beryllium oxide ...

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Abstract

The invention relates to a helix slow wave structure, which belongs to the field of microwave vacuum electronic techniques. The helix slow wave structure comprises a helix, a tube shell and n (n is larger than or equal to 2) dielectric clamping rods. The inner diameter of the helix is a, the outer diameter of the helix is b, the pitch of the helix is p and the helix is formed by a belt-shaped metal wire with a rectangular cross section in a winding way, wherein the length s of the rectangular cross section is equal to b minus a, the width of the rectangular cross section is w and s/w is larger than or equal to 1; n grooves which are in parallel with the central axis of the helix and are evenly distributed on the external surface of the helix; and the shape of the side surface of the dielectric clamping rods in contact with the tube shell is adaptive to the shape of the internal surface of the tube shell, the shape of the side surface of the dielectric clamping rods in contact with the helix is adaptive to the shape of the grooves arranged on the external surface of the helix and therefore the dielectric clamping rods can fix the helix in the tube shell to keep the central axes of the helix and the tube shell to be consistent with each other. By adopting the thicker helix, the helix slow wave structure provided by the invention has the advantages that the electron bombardment resisting capacity of the slow-wave structure is improved, the structure is firmer and the reliability is improved; and moreover, since the contact area between the dielectric clamping rods and the external surface of the helix is larger, the heat dissipating capacity of the slow-wave structure is further improved.

Description

technical field [0001] The invention belongs to the technical field of microwave vacuum electronics, and relates to a slow wave structure in a traveling wave amplifier or an oscillator. Background technique [0002] A traveling wave amplifier or oscillator is a device that uses the interaction between electromagnetic traveling waves and electron beams to amplify electromagnetic waves. In order for the interaction to take place, the phase velocity of the electromagnetic wave needs to be reduced to the same velocity as the electron beam. A slow wave structure such as a helix is ​​used in the device to propagate the electromagnetic wave. The path of electromagnetic wave transmission in the slow wave structure is greater than the axial distance of the slow wave structure, so that the phase velocity of the electromagnetic wave is almost the same as the speed of the electron beam. At this time, the DC energy of the electron beam is converted into the energy of the electromagnetic ...

Claims

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Application Information

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IPC IPC(8): H01J23/26
Inventor 魏彦玉刘鲁伟宫玉彬许雄殷海荣岳玲娜刘漾徐进王文祥
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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