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Cosine grating loading similar sine waveguide slow wave structure

A technology of sine waveguide and slow wave structure, which is applied to the circuit components of time-of-flight electron tubes, etc., and can solve the problems of low interaction efficiency, weak electric field strength, and low gain

Active Publication Date: 2021-07-13
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electric field strength of this structure in the direction of electromagnetic wave transmission is relatively weak, so its coupling impedance is small, resulting in a sinusoidal waveguide traveling wave tube with low output power, low interaction efficiency, low gain and long saturation interaction length. long-term defects

Method used

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  • Cosine grating loading similar sine waveguide slow wave structure
  • Cosine grating loading similar sine waveguide slow wave structure
  • Cosine grating loading similar sine waveguide slow wave structure

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Embodiment Construction

[0024] 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.

[0025] In this example, if figure 2 , 3 , 4, the cosine grid-loaded sinusoidal waveguide slow-wave structure of the present invention includes a sine waveguide 1, the length of its broadside is a, the length of the narrowside is b, and the longitudinal (transmission direction) up and down is a sine wave with the broadside as the center. The linear periodic banding 2, the height of the sinusoidal periodic banding 2 is h, the period length of the sinusoidal periodic banding 2 is p, and the width of the sinusoidal periodic banding 2 is a.

[0026] Between the periodic strip...

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Abstract

The invention discloses a cosine grating loading similar sine waveguide slow wave structure which is characterized in that on the basis of an existing flat-topped sine waveguide slow wave structure, a topped part is in cosine fluctuation of a period in a broadside direction to form a cosine grating, namely, the cosine grating is loaded between an upper wave trough and a lower wave crest of a sine waveguide. Tests show that the cosine grating loaded sine waveguide-like slow wave structure has a higher coupling impedance value, an electromagnetic field is more concentrated in the center area of an electron beam channel, the spaces at the two sides of the electron beam channel are larger, the magnetic field can be effectively reduced when the beam waves of a traveling wave tube interact, and meanwhile the high-frequency transmission characteristic is greatly improved, therefore, the interaction capability of the electron beam and the electromagnetic wave is increased, and the output power, the gain and the interaction efficiency of the traveling wave tube are further improved.

Description

technical field [0001] The invention belongs to the technical field of vacuum electronics, and more specifically relates to a cosine grid-loaded slow wave structure similar to a sine waveguide. Background technique [0002] The development of electromagnetic spectrum resources in the terahertz frequency band is one of the frontier research directions in the field of electronic science and technology today. Electromagnetic waves in the terahertz frequency band have important research value and broad application prospects in many fields such as scientific research, communication equipment, and national economy. Vacuum electronic devices are a promising device that can realize high-power terahertz wave radiation sources. Traveling wave tubes and return wave tubes are a type of millimeter wave and terahertz radiation sources that are widely used in vacuum electronic devices. Among them, traveling wave tubes are the most widely used devices in military equipment, satellite commu...

Claims

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Application Information

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IPC IPC(8): H01J23/24
CPCH01J23/24
Inventor 张建魏彦玉徐进殷海荣岳玲娜赵国庆
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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