Fluctuant waveguide slow wave structure

Abstract

The invention provides a fluctuant waveguide slow wave structure, belonging to the technical field of vacuum electronics. The structure is formed by deforming a conventional rectangular waveguide of which the size of wide edges is a, and the size of narrow edges is b; the E face of the fluctuant waveguide slow wave structure is regularly fluctuant; the H face of the fluctuant waveguide slow wave structure is a plane; crossed contour lines of the E face and the H face are regularly-changed wavy lines; the period length of the regularly-changed wavy lines is p; and the fluctuant height h of theregularly-changed wavy lines is a difference of the size b of the narrow edges for the rectangular waveguide and the height hb of an electron beam channel. The fluctuant waveguide slow wave structureis simple in main structure and easy to process, has the characteristics of low high-frequency loss, small reflection and wide frequency band, is suitable for using banded electron beam to operate, and the like. The fluctuant waveguide slow wave structure is completely applied to travelling wave tubes (TWT) which work in a terahertz wave band, and is a novel slow wave structure with great application potential.

Description

technical field [0001] The invention belongs to the technical field of vacuum electronics and relates to a slow wave structure of a traveling wave tube suitable for working in the terahertz band. Background technique [0002] Research in the terahertz band is a frontier hotspot in the field of electromagnetism and optics. However, due to the lack of a suitable terahertz power source, the development of the electromagnetic spectrum in the terahertz band is still blank. Vacuum electronic devices have great potential in realizing high-power terahertz sources. Traveling wave tube is the most important type of microwave source in the field of vacuum electronics technology. It has the characteristics of high power, high efficiency, high gain, broadband and long life. It is widely used in radar, guidance, satellite communication, microwave remote sensing, and radiation measurement. And other fields, its performance directly determines the level of equipment. The core component o...

AI Technical Summary

Problems solved by technology

Due to the shorter working wavelength, the smaller the size of the slow-wave structure, that is, the size co-transition effect, makes these structures have large high-frequency loss and strong reflection when working in the terahertz band.

In addition, the processing of the electron beam channel of the meandering waveguide is very difficult; the input and output structure of the rectangular grid waveguide is difficult to design

Various difficulties make the development cost of the existing terahertz power source high, the cycle is long, and there is still a long way to go before practical application

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