Time domain spectral element simulation method for microwave ferrite component
A simulation method and technology of time-domain spectral elements, which are applied in the fields of instruments, calculations, and electrical digital data processing, etc., can solve problems such as difficult promotion of time-domain finite element method, huge amount of calculation, and huge time-consuming, so as to reduce unknown quantities, The effect of reduced memory requirements and improved efficiency
Active Publication Date: 2015-05-20
NANJING UNIV OF SCI & TECH
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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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[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 a microwave ferrite component. According to the method, a curved hexahedron unit is utilized to conduct discretization to a whole electromagnetism space containing ferrite materials, ferrite magnetic conductivity which is in a tensor form and contains a damping factor is introduced into an electric field time domain Helmholtz equation, and a single-axis electrical anisotropy perfectly matched layer serves as an absorbing boundary condition, after Galerkin transformation, a central difference scheme is adopted in time discretization, and a time domain electric field iteration formula is obtained; time-domain simulation is conducted to the target ferrite component twice through the time domain electric field iteration formula, and according to the definition of a microwave network scattering parameter, insertion loss, return loss and isolation of the target ferrite component at each port within a working frequency range are determined. The time domain spectral element simulation method for the microwave ferrite component has the advantages of being high in computation accuracy, high in computation speed and broad in range of application.
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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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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