A broadband folded waveguide traveling wave tube capable of suppressing harmonics

Abstract

The invention discloses a broadband folded waveguide traveling wave tube capable of suppressing harmonics, comprising an electron gun, a folded waveguide slow wave structure, a magnetic focusing structure, an input-output coupling structure and a collection stage; the folded waveguide slow wave structure includes an input section and The output section, the input section and the output section are respectively connected by a plurality of U-shaped curved meander waveguides with uniform structure, wherein the length of the input section is greater than that of the output section, and the structural period of the input section is greater than that of the output section; The section is close to the position of the output section, so that a certain number of U-shaped curved waveguides in arbitrarily continuous cycle negatively jump to suppress harmonics. In the position where the uniform structure period of the input section is close to the output section, the present invention makes certain consecutive U-shaped meandering waveguides undergo periodic negative jumps, which has a good effect on suppressing harmonic amplification and increases the frequency of the fundamental wave. output power, thereby improving the overall tube performance of the folded waveguide traveling wave tube.

Description

technical field [0001] The invention belongs to the technical field of broadband folded waveguide traveling wave tubes, in particular to a broadband folded waveguide traveling wave tube capable of suppressing harmonics. Background technique [0002] Traveling wave tube has become the most widely used microwave electric vacuum device because of its wide operating bandwidth, large capacity power, high efficiency and high gain. It is widely used in the fields of communication, satellite, radar, and electronic countermeasures, which are currently receiving more attention, and plays a pivotal role in the communication system. The helical traveling wave tube and coupled cavity traveling wave tube have been the most researched all the time, and the folded waveguide traveling wave tube was first reported and studied as a relatively new traveling wave tube in the 1980s, which has a helical traveling wave The excellent broadband performance of the tube also has the advantages of high...

AI Technical Summary

Problems solved by technology

Harmonic injection technology can achieve a certain effect in suppressing harmonics, but there are great difficulties in operation, and the controllability is relatively poor; the design of magnetic field jumping technology is relatively difficult, and the controllability is also relatively poor; the conventional slow wave structure When the cycle hopping technology suppresses harmonics, its second harmonic output is usually too large and also suppresses the amplification of the fundamental wave, which cannot achieve a more ideal effect.

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