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Euler method for simulating beam-wave interaction of traveling-wave tubes

A technology of injection-wave interaction and Euler method, which is applied in the Euler field of simulating the injection-wave interaction of traveling wave tubes, can solve the problems of low calculation accuracy of Euler nonlinear theory, and achieves fast calculation speed and low memory consumption. Effect

Inactive Publication Date: 2017-09-01
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low calculation accuracy of the existing Euler nonlinear theory, based on the theoretical model of Lagrangian field theory, a Euler method for simulating the injection wave interaction of a traveling wave tube is proposed

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  • Euler method for simulating beam-wave interaction of traveling-wave tubes
  • Euler method for simulating beam-wave interaction of traveling-wave tubes
  • Euler method for simulating beam-wave interaction of traveling-wave tubes

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] The flow chart of the simulation method of injection wave interaction of traveling wave tube of the present invention is as follows figure 1 As shown, it specifically includes the following steps:

[0017] A. Based on the field theory model of the Lagrangian coordinate system, the discrete electron injection is processed into a continuously distributed fluid, and a new processing method is adopted for the electronic phase: first-order Fourier expansion of the electronic phase. Then substitute the expansion into the one-dimensional motion equation and one-dimensional field equation based on the Lagrangian coordinate system, and the motion equation and field equation based on the Euler coordinate system can be obtained;

[0018] Simultaneously combine the motion equation and electron phase equation in one-dimensional Lagrangian coordinate...

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Abstract

The invention belongs to traveling-wave tube simulation techniques, and discloses a Euler method for simulating beam-wave interaction of traveling-wave tubes. Aimed at the problem that calculation precision of existing traveling-wave tubes with the Euler nonlinear theory is low, based on a Lagrangian field theory model, a new treatment method is adopted for electronic phase. The method comprises the steps that Fourier first-order expansion is conducted on the electronic phase; then Bessel function relation is adopted; a nonlinear beam-wave interaction theory model based on a Euler coordinate system is built. The Euler method has the advantages of fast calculation and low memory consumption, the moderate beam-wave interaction process of helix traveling-wave tubes can be precisely simulated, and the method lays a foundation for a study of traveling-wave tube nonlinear theory.

Description

technical field [0001] The invention belongs to the technical field of traveling wave tube simulation, and in particular relates to an Euler method for simulating injection wave interaction of a traveling wave tube. Background technique [0002] Traveling wave tube is one of the most widely used vacuum electronic devices, widely used in satellite communication, radar, electronic countermeasures and other fields. With the rapid development of my country's aerospace industry, there is a very urgent demand for the development and production of space traveling wave tube amplifiers. However, various nonlinear characteristics (such as: group delay, phase distortion, harmonics, third-order intermodulation, etc.) in space traveling wave tube amplifiers will directly affect the overall performance of satellites and spacecraft. Therefore, it is very necessary to establish the nonlinear theory of TWT to study the generation mechanism and suppression method of these nonlinear character...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 胡玉禄邱海舰胡权朱小芳杨中海李斌
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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