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Three-dimensional Electromagnetic Field Simulation Method Based on Periodic Structure of 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 problems affecting the design of high-performance periodic structures, low overall simulation efficiency of high-frequency characteristics, etc.

Active Publication Date: 2016-07-06
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 Based on Periodic Structure of Phase Shift Reduced Model
  • Three-dimensional Electromagnetic Field Simulation Method Based on Periodic Structure of Phase Shift Reduced Model
  • Three-dimensional Electromagnetic Field Simulation Method Based on Periodic Structure of 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 based on the periodic structure of the phase-shift reduced-order model. The original eigenequation obtained by the finite element method is expanded by Taylor series at a single phase-shift point, and reduced to a lower dimension Eigenequations, this process is to establish a reduced-order model. Once the lower-dimensional eigenequation, that is, the reduced-order model is established, the eigenequation of the periodic structure at multiple phase shift points can be calculated very quickly, so as to obtain the high-frequency characteristics of the periodic structure in a wide frequency band. The three-dimensional electromagnetic field simulation method based on the phase-shift reduced-order model periodic structure proposed by the present invention can perform finite element eigenanalysis on the periodic structure in the case of a phase-shift point, and can quickly and accurately obtain the periodic structure within the entire bandwidth. High frequency characteristics.

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 Patents(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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