A Segmented Helical Folded Waveguide

Abstract

The invention discloses a segmented spiral line type folded waveguide. The segmented spiral line type folded waveguide comprises at least two shortest waveguide period structures connected in sequence along a Z axis. The segmented spiral line type folded waveguide comprises multiple right-angle bending waveguides and straight waveguides. When the segmented spiral line type folded waveguide is applied to a linear electromagnetic wave vacuum device, such as a traveling wave tube and the like, compared with a traditional folded waveguide, the segmented spiral line type folded waveguide has the advantages that a 180-degree phase difference due to the right-angle bending waveguides when electron beams pass through a traditional slow-wave structure is overcome, and the working bandwidth of an electromagnetic wave source can be better extended. Meanwhile, the number of linear electron beam channels can be increased to two or more, and the beam-wave interaction efficiency can be remarkably improved. The segmented spiral line type folded waveguide also can be used for realizing compact delay lines of various waveguides, such as single-ridged waveguides or double-ridged waveguides, particularly, a slow-wave structure of a compact type traveling wave tube amplifier, and the like. The segmented spiral line type folded waveguide is applied to various kinds of communication systems and radar systems at frequency bands of microwave, millimeter wave and terahertz wave.

Description

technical field [0001] The invention relates to an electromagnetic wave transmission line. Specifically, it relates to a compact segmented helical folded waveguide for signal delay or slow wave structure for electromagnetic wave source. Background technique [0002] The first important application of folded transmission lines was as a signal delay line, used for signal delay in systems such as radar. A second important application of folded transmission lines is as a slow wave structure in traveling wave tube amplifiers. 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 electromagnetic wave felt by the electron b...

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

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