Time Domain Spectral Element Simulation Method for Microwave Ferrite Components

A simulation method and time-domain spectral element technology, which is applied in the fields of instrumentation, calculation, electrical digital data processing, etc., can solve the problems of the time-domain finite element method being difficult to popularize, the amount of calculation is huge, and the time-consuming is huge, and the number of unknowns is reduced, The effect of reduced memory requirements and increased efficiency

Active Publication Date: 2018-01-23
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, the use of the finite element method involves the solution of a large linear equation system, and for electrically large-scale electromagnetic problems, the amount of calculation will be very large
When the finite element method is applied to the time domain, there is an unavoidable problem, that is, such a system of equations must be calculated once in each time step of the algorithm, and the total time consumption is very large, which is exactly the time domain finite element method. The main reason why the law is difficult to promote

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  • Time Domain Spectral Element Simulation Method for Microwave Ferrite Components
  • Time Domain Spectral Element Simulation Method for Microwave Ferrite Components
  • Time Domain Spectral Element Simulation Method for Microwave Ferrite Components

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Embodiment 1

[0093] combine figure 1 , a time-domain spectral element simulation method for microwave ferrite components, wherein the microwave ferrite components are Y-shaped waveguide circulators, such as figure 2 As shown, the diameters of the three sections of waveguides are all 22.86mm×10.16mm, and they are set at 120° to each other, and ferrite columns are arranged at the intersection of the three sections of waveguides. The radius of the ferrite column is 3.5mm, and the height is 10.16mm; the ferrite material is TT1-109, and the parameter is ε rf =11.7,4πM s =1317G,H 0 = 200Oe. The time-domain spectral element simulation method specifically includes the following steps:

[0094] Step 1. Establish the geometric model of the target: according to the structural size of the microwave ferrite components, use a computer-aided design tool (such as ANSYS) to model, and use 20 points of curved hexahedron elements to discretize the target model to obtain all The geometric parameter info...

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Abstract

The invention discloses a time-domain spectral element simulation method for microwave ferrite components. The method uses a curved hexahedron unit to discretize the entire electromagnetic space containing ferrite materials, and the The magnetic permeability of ferrite is introduced into the electric field time-domain Helmertz equation, and the uniaxial electric anisotropy perfectly matched layer is used as the absorption boundary condition. After the Galerkin transformation, the central difference scheme is adopted in the time dispersion, and the time Domain electric field iterative method; use the time domain electric field iterative method to perform two time domain simulations on the target ferrite components, and determine the insertion loss and return of each port of the target ferrite component in the working frequency band according to the definition of microwave network scattering parameters. wave loss and isolation. The invention has the advantages of high calculation precision, fast calculation speed and wide application range.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic simulation, in particular to a time-domain electromagnetic simulation method for microwave ferrite components. Background technique [0002] In general, the passive microwave network composed of isotropic materials always satisfies the reciprocity characteristic between each port. However, if anisotropic materials are used therein, passive microwave networks with non-reciprocal properties can be obtained. Ferrite is a ferrimagnetic material with magnetic anisotropy. Since the discovery of the ferromagnetic resonance phenomenon of electromagnetic waves in ferrite in 1949, people have conducted in-depth research on the non-reciprocal transport mechanism of electromagnetic waves propagating in ferrite materials. Studies have shown that the magnetic anisotropy of ferrite materials is actually induced by an externally applied constant magnetic field, which acts on the magnetic dipoles in the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 盛亦军陈如山丁大志樊振宏王贵沙侃叶晓东李兆龙
Owner NANJING UNIV OF SCI & TECH
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