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An ultra-broadband quasi-open slow-wave structure

A slow-wave structure and ultra-broadband technology, applied in the field of slow-wave structures, can solve the problems of large depth-to-depth ratio of the structure, increased processing difficulty, dispersion of longitudinal electric field distribution, etc., and achieves low tuning operating voltage, low processing difficulty, and large coupling impedance. Effect

Inactive Publication Date: 2017-05-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0007] However, with the increase of the broadside of the sine wave slow wave structure, the longitudinal electric field distribution of this slow wave structure will become more dispersed, resulting in a very small average coupling impedance in the band-shaped electron beam passing region, making the return wave oscillator It is difficult to vibrate, and the interaction efficiency is low; at the same time, due to the increase of the broad side, the depth ratio of the structure becomes larger, resulting in an increase in the difficulty of microfabrication

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  • An ultra-broadband quasi-open slow-wave structure
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[0027] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0028] In this example, if figure 1 As shown, the ultra-broadband quasi-open slow wave structure of the present invention includes two identical metal plates 1 with a broadside length a, located on the upper and lower sides, separated by a distance b, and a longitudinal length of l, which are located at the same position in the vertical direction.

[0029] At the same time, load the width R on the lower side of the upper metal plate and the center position of the upper side of the lower metal plate in the width direction. w , the height is R h A strip-shaped metal ridge 2...

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Abstract

The invention discloses an ultra-broadband quasi-open slow-wave structure, which comprises two identical metal plates and supporting metal walls or media on both sides, wherein, at the center of the width direction of the lower side of the upper metal plate and the upper side of the lower metal plate Load a strip-shaped metal ridge with a width of Rw and a height of Rh that periodically undulates along the longitudinal direction, wherein the period length of the ups and downs is p; in this way, a strip-shaped electron injection channel is formed in the space between the strip-shaped metal ridges, and its height hb is the difference between the metal plate distance b and twice the ridge height Rh. It has a natural strip-shaped electron beam channel, no additional processing is required, the processing difficulty is low, and the coupling impedance is large, which is very conducive to the start-up of the return wave oscillator; the low-end cut-off frequency is very low, with ultra-wideband characteristics, and high-frequency transmission Reflect small features.

Description

technical field [0001] The invention belongs to the technical field of vacuum electronics, and more specifically relates to an ultra-broadband quasi-open slow wave structure suitable for working in a terahertz band return wave tube. Background technique [0002] Terahertz (THz for short) usually refers to electromagnetic waves with a frequency of 0.1-10 THz (wavelength of 0.03-3 mm), which is located between infrared and microwave. Due to its special position in the electromagnetic spectrum, terahertz science and technology is currently a very important interdisciplinary frontier field. The unique properties of terahertz waves make it have broad practical prospects in the fields of basic research in biology, medicine, physics, chemistry, and electronic information, as well as in technical fields such as material research, communication information, environmental science, spectroscopy, and national security. and important scientific research value. At the same time, teraher...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J23/24H01J23/28
CPCH01J23/24H01J23/28
Inventor 张鲁奇魏彦玉徐进赵国庆王战亮宫玉彬王文祥
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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