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Slow wave line for travelling wave tube

A technology of traveling wave tubes and slow wave lines, applied in the field of slow wave lines, can solve problems such as unstable operation of traveling wave tubes and interference with fundamental mode electromagnetic waves, and achieve the effect of eliminating high-order mode electromagnetic waves

Inactive Publication Date: 2012-06-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the phase velocity of the high-order mode electromagnetic wave is basically equal to the velocity of the electron beam, the high-order mode electromagnetic wave will be amplified, thereby interfering with the work of the fundamental mode electromagnetic wave and making the traveling wave tube unstable.

Method used

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  • Slow wave line for travelling wave tube
  • Slow wave line for travelling wave tube
  • Slow wave line for travelling wave tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: as Figure 5 , Image 6 and Figure 7 shown. A slow wave line for a traveling wave tube, consisting of multiple groups of photonic crystal units 14 axially arranged along the electron beam channel 8 of the traveling wave tube, the interior of the photonic crystal unit 14 is a hollow structure, and multiple groups of photonic crystal units 14 The hollow structure forms the electron beam channel 8 of the traveling wave tube, the foreground material 11 of the photonic crystal unit 14 is two-dimensionally arranged periodically in the radial direction, the background material 12 fills the gap between the foreground material 11, and the photonic crystal unit 14 The metal separators 13 arranged periodically in the axial direction are fixedly connected together and separated by them. The foreground material 11 of the photonic crystal unit 14 uses an alloy permanent magnet material, such as materials such as samarium cobalt (SmCo), neodymium iron boron (Nd2Fe14B...

Embodiment 2

[0029] Embodiment 2: as Figure 9 , Figure 10 with Figure 11 As shown, a slow wave line for a traveling wave tube consists of multiple groups of photonic crystal units 14 arranged axially along the electron beam channel 8 of the traveling wave tube, and the photonic crystal units 14 are symmetrically divided into two columns up and down, two columns The gaps between the photonic crystal units 14 form the electron beam channel 8 of the traveling wave tube, the foreground materials 11 of the photonic crystal units 14 are arranged in two-dimensional periodicity along the radial direction, and the background materials 12 fill the gaps of the foreground materials 11 , the photonic crystal units 14 are fixedly connected together and isolated by the metal partition 13 . The foreground material 11 of the photonic crystal unit 14 uses an alloy permanent magnet material, such as materials such as samarium cobalt (SmCo), neodymium iron boron (Nd2Fe14B) or AlNiCo (AlNiCo); the backgro...

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Abstract

The invention relates to a slow wave line for a travelling wave tube; a plurality of groups of photonic crystal units are axially arrayed along an electron beam channel of the travelling wave tube, the photonic crystal unit is a hollow structure, the hollow structures of a plurality of the photonic crystal units form the electron beam channel of the travelling wave tube, the foreground materials of the photonic crystal units are arrayed in a two-dimensional periodical way radially, the background material thereof fills the clearances of the foreground materials, the photonic crystal units arefixedly connected together by metal separation plates which are axially arrayed periodically and are separated by the metal separation plates, the foreground materials of the photonic crystal units are alloy permanent magnet material, the background material adopts ferrite permanent magnet material, and the metal separation plate adopts soft magnetic material; the slow wave line has the beneficial effects that: three functions of bunching electron beam, providing slow electromagnetic wave and filtering high order mode electromagnetic waves are realized in the same structure.

Description

technical field [0001] The invention belongs to the technical field of microwave vacuum electronics, and in particular relates to slow wave lines of traveling wave tubes. Background technique [0002] Traveling wave tube is a broadband high-power microwave source device, which is widely used in radar communication and space satellite communication. Schematic diagram of the structure of the traveling wave tube figure 1 and figure 2 As shown, the traveling wave tube mainly includes: electron gun 1, slow wave line 2 (slow wave circuit), beamforming system 3, collector 4, metal shielding shell 5, input waveguide 6 and output waveguide 7. There is an electron beam channel 8 inside the slow wave line, the beamforming system 3 and the metal shielding shell 5 surround the outer circumference of the slow wave line in turn, the electron gun 1 and the collector 4 are respectively located at the two ends of the slow wave line, the input waveguide 6 and the output waveguide 7 are res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J23/24
Inventor 宫玉彬殷海荣魏彦玉王文祥
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA