A Segmented Rim Helical Folded Waveguide

Abstract

The invention discloses a segmented outer-edge-convex spiral line type folded waveguide. The segmented outer-edge-convex spiral line type folded waveguide comprises at least two shortest waveguide period structures connected in sequence along a Z axis. The segmented outer-edge-convex spiral line type folded waveguide comprises multiple right-angle bending waveguides and straight waveguides. Compared with the conventional folded waveguide, when the segmented outer-edge-convex spiral line type folded waveguide is applied to a traveling wave tube and other linear electromagnetic vacuum devices, the problem that a 180-degree phase difference exists due to the right-angle bending waveguide when an electron beam passes through the conventional slow waveguide is overcome; therefore, the expansion of the operating bandwidth of an electromagnetic wave source can be promoted; meanwhile, the number of the linear electron beam channels can be increased to be two or more, so that the interaction efficiency of the beam waves can be remarkably improved; in addition, by adoption of the segmented outer-edge-convex spiral line type folded waveguide, the compact type delay lines with various kinds of waveguides, such as a single-ridge waveguide or a double-ridge waveguide can be realized, particularly, a slow-wave structure of a compact type traveling wave tube amplifier, and the like can be realized; and furthermore, the segmented outer-edge-convex 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. In particular, it relates to a compact segmented rim raised helical folded waveguide for slow wave structures for signal delay or 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 t...

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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