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Method for improving gain flatness of coupling cavity traveling-wave tube

A gain flatness, coupled cavity technology, applied in the direction of the circuit components of the transit time type electron tube, can solve the problem of excessive fluctuation of the gain of the coupled cavity traveling wave tube

Inactive Publication Date: 2012-05-30
HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for improving the gain flatness of the coupling cavity traveling wave tube and solve the problem of excessive gain fluctuation of the coupling cavity traveling wave tube

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  • Method for improving gain flatness of coupling cavity traveling-wave tube
  • Method for improving gain flatness of coupling cavity traveling-wave tube
  • Method for improving gain flatness of coupling cavity traveling-wave tube

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Embodiment Construction

[0037] The specific implementation of the present invention will be described in further detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solutions of the invention.

[0038] Such as figure 1 The coupled cavity traveling wave tube shown is composed of an electron gun, a coupled cavity slow wave system, a collector, a microwave input system, and a microwave output system.

[0039] figure 2 It is a schematic diagram of the function of the coupled cavity traveling wave tube slow wave system with a gain below 30dB. A coupled-cavity slow-wave system consisting of a driver section and an output section separated by an absorber between the two sections. There are only input sections in the driver section. The output section consists of three parts, namely the initial phase speed section, the first phase speed jump sec...

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Abstract

The invention discloses a method for improving the gain flatness of a coupling cavity traveling-wave tube. In the invention, a coupling cavity chain is added in an appropriate position of the traditional coupling cavity traveling-wave tube slow-wave structure. The chromatic dispersion of the coupling cavity chain is greater than that of other sections of the coupling cavity traveling-wave tube slow-wave system, the phase velocity of microwave signals in the coupling cavity chain is smaller than the movement velocity of electronic beams, and the microwave signals can obtain negative gains in the coupling cavity chain. In other sections of the coupling cavity traveling-wave tube slow-wave system, the microwave signals can obtain positive gains. Because of the superposition of the positive gains and the negative gains, the flatness of the entire slow-wave system can be improved. The method is applicable and feasible and has high use values.

Description

technical field [0001] The invention relates to the field of microwave vacuum electronics, in particular to a method for improving the gain flatness of a coupling cavity traveling wave tube. Background technique [0002] According to its slow wave structure, traveling wave tubes can be divided into helical traveling wave tubes, coupled cavity traveling wave tubes, etc. The helical slow wave system has very small dispersion and has a wide operating bandwidth, but the helical slow wave system has poor heat dissipation performance, so it is generally used in medium and small power traveling wave tubes with wide frequency bands. The coupled cavity slow wave system has strong dispersion, so its operating bandwidth is very narrow compared to the helical slow wave system, but the coupled cavity slow wave system has good heat dissipation performance and can withstand considerable operating power. Wave systems are generally used in high-power traveling wave tubes. [0003] The coup...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J23/24
Inventor 吴华夏江祝苗方卫沈旭东张丽
Owner HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE