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Uniform spiral rectangular folded waveguide

A technology of folded waveguide and helix, which is applied in the direction of waveguide, waveguide-type devices, delay lines, etc., can solve the problems of beam-wave interaction efficiency, overall performance degradation of devices, relative bandwidth limitation of folded waveguide traveling wave tube, etc., and achieve widening work The effect of bandwidth and increased power

Active Publication Date: 2016-11-16
成都赛纳为特科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This imposes a severe limitation on the relative bandwidth of the folded waveguide TWT
Another problem with ordinary folded waveguide traveling wave tubes is the efficiency of the beam-wave interaction due to the single e-book
At home and abroad, there are plans to adopt 2 to 3 electron beams, but compared with the main electron beam located on the central axis of the structure, the phases of the electromagnetic waves experienced by other electron beams will have a certain degree of mismatch, resulting in a decline in the overall performance of the device

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 with 2 Shown.

[0029] The uniform helical rectangular folded waveguide includes three shortest waveguide periods 2 and input-output waveguide 1 that are sequentially connected and repeated along the Z axis.

[0030] The intersection of the straight line AB parallel to the Z axis and any one of the shortest waveguide periods is a continuous line segment CD.

[0031] 4 straight electronic channels 7 are provided. The linear electron beam channel 7 is parallel to the Z axis. The linear electron beam channel 7 coincides with the straight line AB. The line segment CD passes through the point of maximum amplitude of the electric field intensity of the electromagnetic wave in the shortest waveguide period. In other words, the linear electron channel 7 passes through the position where the electric field intensity is the largest in the uniform spiral rectangular folded waveguide.

[0032] The two end faces of the shortest waveguide period are single-ridged rectangu...

Embodiment 2

[0036] Such as image 3 Shown.

[0037] Compared with Embodiment 1, the only difference is that the two end faces of the shortest waveguide period are double-ridged rectangular waveguides; the broad side of any end face of the two end faces of the shortest waveguide period is parallel to the Y-axis direction. The double ridges of the double-ridge rectangular waveguide are respectively located on the two broad sides of the waveguide.

Embodiment 3

[0039] Such as Figure 4-10 Shown. Compared with implementation example 1, the only difference is:

[0040] Both ends of the shortest waveguide period are parallel to the YZ plane. The shape of the two end faces of the shortest waveguide period is rectangular; the broad sides of the two end faces of any shortest waveguide period are parallel to the Y-axis direction.

[0041] The six shortest waveguide periods of the uniform spiral rectangular folded waveguide are arranged on a cylindrical inner conductor 9; the outer surfaces of the plurality of shortest waveguide periods coincide with the outer surface of the cylindrical inner conductor 9.

[0042] The uniform helical rectangular folded waveguide also includes two outer conductors 9a; the inner surface of the outer conductor 9a coincides with the outer surface of the cylindrical inner conductor 9; all the outer conductors 9a have the outer surface of the inner conductor seal.

[0043] There are 8 linear electron beams in total.

[...

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Abstract

The invention discloses a uniform spiral rectangular folded waveguide, which comprises at least two shortest waveguide periods and an input-output waveguide communicated in sequence along the Z-axis direction. The waveguide is a rectangular waveguide, a single-ridged rectangular waveguide or a double-ridged rectangular waveguide. The uniform spiral rectangular folded waveguide is formed by spirally bending a waveguide material having a certain cross section along the Z-axis direction. When applied to a linear electromagnetic wave vacuum device of a travelling wave tube and the like, the uniform spiral rectangular folded waveguide, compared with a conventional folded waveguide, overcomes the problem of 180-degree phase difference due to U-shaped bent waveguide caused when an electron beam passes through a conventional slow wave structure, and can facilitate broadening work bandwidth of an electromagnetic wave source better. Meanwhile, the number of linear electron beam channels can be increased to two or more than two, and beam wave interaction efficiency can be obviously improved. The uniform spiral rectangular folded waveguide can also be used for realizing compact delay lines of various waveguides, the single-ridged rectangular waveguide or the double-ridged rectangular waveguide.

Description

Technical field [0001] The invention relates to an electromagnetic wave transmission line. Specifically, it relates to a compact uniform spiral rectangular folded waveguide with a slow wave structure for signal delay or electromagnetic wave source. Background technique [0002] The first important application of the folded transmission line is as a signal delay line, which is used for signal delay in systems such as radar. The second important application of the folded transmission line is its use as a slow-wave structure in a traveling wave tube amplifier. At this time, the electron beam propagates along a certain straight electron channel, while the electromagnetic wave propagates along the bent transmission line. Although the phase velocity of the electromagnetic wave propagating in the folded transmission line is very fast, which can be close to the speed of light, or even greater than the speed of light, in the linear electron channel, the phase velocity of the electromagn...

Claims

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Application Information

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IPC IPC(8): H01J23/26H01P3/00H01P9/02
CPCH01J23/26H01P3/00H01P9/02
Inventor 王清源
Owner 成都赛纳为特科技有限公司
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