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Three-dimensional electromagnetic field simulation method of periodic structure based on phase-shift reduced model

A periodic structure, reduced-order model technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of low overall simulation efficiency of high-frequency characteristics, affecting the design of high-performance periodic structures, etc.

Active Publication Date: 2013-11-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

This directly leads to the low overall simulation efficiency of the high-frequency characteristics of periodic structures, which seriously affects the design of high-performance periodic structures.

Method used

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  • Three-dimensional electromagnetic field simulation method of periodic structure based on phase-shift reduced model
  • Three-dimensional electromagnetic field simulation method of periodic structure based on phase-shift reduced model
  • Three-dimensional electromagnetic field simulation method of periodic structure based on phase-shift reduced model

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Embodiment Construction

[0061] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0062] refer to figure 1 , a three-dimensional electromagnetic field simulation method based on a phase-shift reduced-order model periodic structure, comprising the following steps:

[0063] A. Establish the electromagnetic field boundary value problem in the periodic structure, and obtain the functional equation of the electromagnetic field boundary value problem through the standard variational principle of the finite element method.

[0064] First, according to Maxwell's equations and the boundary conditions and conductor properties of the periodic structure, the boundary value problem of the electromagnetic field in the periodic structure is obtained, as follows:

[0065] ▿ × μ r ...

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Abstract

The invention discloses a three-dimensional electromagnetic field simulation method of a periodic structure based on a phase-shift reduced model. An original eigen equation acquired by a finite element method is subjected to Taylor series expansion in a single phase shift point to be reduced to an eigen equation lower in dimension, and the process is to build the reduced model. Once the eigen equation lower in dimension, namely the reduced model, is built, an eigen equation of the periodic structure in multiple phase shift points can be calculated quite quickly, so that high-frequency characteristics of the periodic structure in a broadband are acquired. By the aid of the three-dimensional electromagnetic field simulation method of the periodic structure based on the phase-shift reduced model, finite-element eigen analysis can be performed on the periodic structure under the condition of one phase shift point, and high-frequency characteristics of the periodic structure in a whole bandwidth can be acquired rapidly and accurately.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional electromagnetic field numerical solution, and relates to a three-dimensional electromagnetic field simulation method based on a periodic structure of a phase-shift reduced-order model. Background technique [0002] Periodic structures are widely used in microwave tubes, including periodic changes in waveguide cross-section, periodic loading of diaphragms in waveguides, and periodic filling of dielectrics. In microwave tubes, periodic structures are commonly used as the high-frequency circuit of the device, forming a place where electron beams interact with high-frequency fields for energy exchange to realize microwave oscillation or amplification. High-frequency characteristics of the periodic structure: including dispersion characteristics, impedance characteristics and attenuation characteristics, which directly affect the operating frequency, frequency bandwidth, conversion efficiency...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 徐立李斌杨中海朱小芳李建清
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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