Adaptive fitting and simulation method for nport problem based on vector matching method

A technology of vector matching and simulation methods, applied in design optimization/simulation, special data processing applications, etc., can solve problems such as long simulation time and unbearable calculation time, and achieve good effect, simple form, and high fitting accuracy

Active Publication Date: 2020-06-02
SHENZHEN HUADA EMPYREAN TECH CO LTD
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Problems solved by technology

When using this method to do convolution, in order to obtain the convolution at the current moment, it must be integrated from zero time to the current time, resulting in the longer the simulation time, the greater the cost of calculating the convolution at the current time, and the calculation time is usually unbearable

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  • Adaptive fitting and simulation method for nport problem based on vector matching method
  • Adaptive fitting and simulation method for nport problem based on vector matching method
  • Adaptive fitting and simulation method for nport problem based on vector matching method

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Embodiment Construction

[0062] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0063] image 3 For the nport problem adaptive fitting and simulation method flowchart based on the vector matching method of the present invention, reference will be made below image 3 , the vector matching method-based nport problem adaptive fitting and simulation method of the present invention is described in detail.

[0064] First, in step 101, the vector matching method is used to adaptively fit the S parameters. After the measured S parameters are fitted by the vector matching method, they theoretically have the form of a rational fraction sum. In practical applications, considering the delay effect in the time domain, we generally have a fitting form

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Abstract

The invention provides an nport problem self-adaptive fitting and simulation method based on a vector fitting method. The nport problem self-adaptive fitting and simulation method includes the following steps that 1, the vector fitting method is used for self-adaptive fitting of an S parameter, and the optimal fitting result SIJ (s) of the fitting order K and the delay time d is obtained, wherein1< / =i and j< / =n; 2, through Laplace inverse transformation, a transfer function Sij (s) in a frequency domain is converted into an excitation function Sij (t) in a time domain; 3, the convolution of the S parameter is calculated through a recursion method, and thus an algebraic equation of an nport model is obtained. According to the nport problem self-adaptive fitting and simulation method basedon the vector fitting method, the vector fitting method is used for self-adaptive fitting of the S parameter and the recursive convolution is used for quickly calculating the convolution of the S parameter, higher fitting accuracy and better fitting effect are achieved, and an approximate computational format simple in form and very high in accuracy is given through the Taylor.

Description

technical field [0001] The invention relates to the technical field of circuit simulation, in particular to an adaptive fitting and simulation method for nport problems based on a vector matching method. Background technique [0002] Vector fitting method (vector fitting) is a stable and effective fitting method proposed by B.Gustavsen in the document "Rational approximation of frequency domain responses by vector fitting" (published in "IEEE Transactions on Power Delivery" Volume 14 Issue 3) . The vector matching method is especially suitable for the modeling of S parameters (Y parameters or Z parameters) in circuit simulation. Compared with other fitting methods, it has the following advantages: [0003] (1) In principle, the vector matching method is given the initial pole, and the corrected pole is obtained by solving two linear least squares equations. Usually, only a limited number of iterations can be used to obtain the pole that meets the requirements, and the conve...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 赵林吴大可程明厚李雷刘寅
Owner SHENZHEN HUADA EMPYREAN TECH CO LTD
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