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

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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Problems solved by technology

But for the whole system, the order of the vector fitting model is very high, and the state variables have many dimensions, which increases the computational burden and brings great difficulties to the circuit simulation.

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