Curved ridge-loading rectangular slot waveguide slow wave line

Abstract

The invention discloses a curved ridge-loading rectangular slot waveguide slow wave line, which belongs to the field of microwave vacuum electronic devices. The slow wave line comprises two parallel metal plates, wherein an upper metal plate and a lower metal plate are supported and fixed together through a side wall; the two metal plates are provided with curved slots; the shapes of sections of the curved slots are the same as those of half sections formed after the section of a rectangular single-ridge waveguide or a rectangular double-ridge waveguide is sectioned along the central line of a wide edge of the waveguide; each curved slot is formed by connecting a series of curved slot parts with straight slot parts side by side alternately; and the curved slots of the upper metal plate and the lower metal plate are formed in a mirror symmetry mode relative to a central plane between the upper metal plate and the lower metal plate. The curved ridge-loading rectangular slot waveguide slow wave line provided by the invention has the advantages of curved slot waveguide slow wave lines and ridge waveguides, so that the slow wave line has higher power capacity and a wider operating bandwidth; and the slow wave line has the wider operating bandwidth and higher coupling resistance under the same size compared with the conventional curved slot waveguide slow wave line, so that the increase of the bandwidth of a travelling wave tube and the improvement on gains and efficiency are facilitated.

Description

technical field [0001] The invention belongs to the technical field of microwave vacuum electronic devices, and in particular relates to a beam-wave interaction device of a traveling wave tube—a slow wave line. Background technique [0002] Traveling wave tubes have a prominent application status in many fields such as military and civilian radar, communication, electronic countermeasures, etc., and the slow wave structure (slow wave line) is a key component in the traveling wave tube that has a decisive impact on performance. At present, there is a serious contradiction between the output power and the working bandwidth of the traveling wave tube. The slow wave traveling wave tube such as the helix and its deformation has a very wide bandwidth, but the output power is relatively small due to the heat dissipation conditions; while the coupling cavity 1. Trapezoidal slow-wave line TWT is an all-metal structure, and its power capacity is generally more than an order of magnitu...

AI Technical Summary

Problems solved by technology

[0005] Even the meandering rectangular waveguide slow-wave line has advantages over ordinary rectangular waveguide slow-wave lines, meandering rectangular waveguide slow-wave lines, and even rectangular-groove waveguide slow-wave lines, but when the signal frequency is further increased, especially into the submillimeter wave , and even after the terahertz band, the meandering rectangular slot waveguide slow wave line still faces extreme challenges in terms of device size and processing accuracy.

Images