Rectangular-grooved loading winding waveguide slow wave line

Abstract

The invention provides a rectangular-grooved loading winding waveguide slow wave line, relating to a travelling wave tube amplifying device in the technical field of microwave vacuum electronics. A series of arc (or right-angle) bend waveguides and straight waveguides are connected end to end to form a winding waveguide structure; each bend waveguide is inboard provided with an opening along the broadside direction of the waveguides; each opening position is connected with a rectangular groove; the whole winding waveguides and the chambers of the rectangular-grooves are mutually communicated; the central axis symmetric line of the winding waveguide structure, the straight waveguides walls and the rectangular-grooved walls are provided with circular through holes at the points of intersection thereof; then two through holes of all adjacent straight waveguide walls and rectangular-grooved walls are connected by metal tubes with the same aperture size as the aperture size of the circular through holes to form an electron bunch channel. In the invention, the rectangular grooves featuring periodic loading are used for improving field distribution in conventional winding waveguide slow wave line; the slow wave line of the invention, compared with ordinary slow wave line, has higher coupling impedance, higher power gain and output power and smaller volume.

Description

technical field [0001] The invention belongs to the technical field of microwave vacuum electronics and relates to a traveling wave tube amplification system, in particular to a waveguide slow wave line in the traveling wave tube amplification system. Background technique [0002] Modern traveling wave tubes have become important microwave electronic devices for electronic equipment such as radar, electronic countermeasures, satellite communications, navigation, and remote sensing. The slow wave line is the core of the traveling wave tube, and its performance directly determines the technical level of the traveling wave tube. In traveling wave tubes, the most widely used slow wave structures are helix and coupled cavity. The dispersion characteristics of the helix are flat and the working frequency is wide, so it has been widely used in traveling wave tubes; but the output power of the helical traveling wave tube is limited, especially when the traveling wave tube works in ...

AI Technical Summary

Problems solved by technology

According to the relevant experimental reports at home and abroad, although the meander waveguide slow-wave structure has a large bandwidth, the coupling impedance of the structure is very small, which makes the gain per unit length low, thus limiting the overall output power and gain of the TWT , but also lead to the length of the structure is too long, it is difficult to miniaturize

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