Vector fitting and balanced truncation method based electromagnetic compatible macro model modeling method

A technology of vector fitting and model modeling, which is applied in electrical digital data processing, special data processing applications, instruments, etc., and can solve problems such as increased computational burden, difficulty in circuit simulation, and many dimensions of state variables

Inactive Publication Date: 2014-08-27
BEIHANG UNIV
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But for the whole system, the order of the vector fitting model is very high, and the state variables have man

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  • Vector fitting and balanced truncation method based electromagnetic compatible macro model modeling method
  • Vector fitting and balanced truncation method based electromagnetic compatible macro model modeling method
  • Vector fitting and balanced truncation method based electromagnetic compatible macro model modeling method

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Embodiment Construction

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0048] The EMC macromodel modeling method based on the vector fitting and balanced truncation method provided by the present invention firstly obtains the frequency point data under a certain bandwidth by testing the port scattering parameters of the circuit with a vector network analyzer, and vector fitting these test data Obtain the state space model of the circuit, then use the balance truncation method to reduce the order of the state space model, and then convert the reduced state space model into a SPICE model, thereby generating the macro model of the original circuit, and finally when other circuit systems produce the same When dealing with EMC problems, this macro model can be used instead of the original circuit module for analysis.

[0049]The measurement system of circuit port scattering parameters includes the object under test (p...

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Abstract

The invention provides a vector fitting and balanced truncation method based electromagnetic compatible macro model modeling method. The vector fitting and balanced truncation method based electromagnetic compatible macro model modeling method comprises measuring port scattering parameters to obtain scattering parameters under different frequency points and obtaining a state space model due to conversion through a vector fitting method; constructing a passivity judgment matrix according to a state equation coefficient matrix and performing model passivity judgment and enhancement; calculating controllability and observability Grammian matrixes according to the state equation coefficient matrix to achieve system balance; calculating an HSV (Hankel Singular Value) and a corresponding curvature spectrum of every frequency point and confirming orders of a reduced-order model; confirming a reduced order macro module; obtaining a general module. According to the vector fitting and the balanced truncation method based electromagnetic compatible macro model modeling method, a wideband system model of an original circuit can be fit only according to testing data within a small frequency band, the accuracy is high, the fitting time is short, the model orders can be confirmed rapidly after order reduction, the electromagnetic compatible macro model modeling time is greatly reduced, and a converted SPICE (Simulation Program with Integrated Circuit Emphasis) net list has universality.

Description

technical field [0001] The invention relates to a predictive modeling method in the electromagnetic field, more specifically, an electromagnetic compatibility macromodel modeling method based on vector fitting and balance truncation method. Background technique [0002] The problem of electromagnetic compatibility has become more and more prominent in the process of circuit system design, and has become one of the key issues restricting the development speed and market competitiveness of circuit systems. [0003] An accurate and effective electromagnetic emission model is the key to predicting and simulating system electromagnetic compatibility. The currently popular modeling method based on vector fitting can quickly and automatically establish a broadband equivalent model based on measurement data, and has relatively high model accuracy. But for the whole system, the order of the vector fitting model is very high, and the state variables have many dimensions, which makes ...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 谢树果林冠豫马超张卫东
Owner BEIHANG UNIV
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