System and method for analyzing scattering parameter passivity

Abstract

The invention provides a system and a method for analyzing scattering parameter passivity, which can be applied to a calculating device. The calculating device is connected with a measuring instrument which is used for measuring a signal transmitted on a circuit to obtain a scattering parameter file. The system comprises a parameter reading module, a vector fitting module, a matrix conversion module and a passivity analysis module, wherein the system reads the scattering parameter file by the modules; each scattering parameter is respectively subjected to vector fitting to generate a non-common extreme-value form rational function matrix of the scattering parameter; according to the rational function matrix, an equivalent circuit is generated, and the rational function matrix is converted into a state space matrix; finally, the state space matrix obtained by conversion is substituted into a Hamilton matrix by the system; and whether the characteristic value of the Hamilton matrix comprises a pure imaginary numerical value is analyzed to judge whether the rational function matrix satisfies the passivity or not so as to judge whether the equivalent circuit satisfies the passivity requirement or not.

Description

technical field [0001] The invention relates to a circuit simulation system and method, in particular to a scattering parameter passivity analysis system and method. Background technique [0002] In low frequency circuits, the size of electronic components such as transmission lines is negligible relative to the wavelength of the signal. However, in high-frequency microwave circuits, due to the short wavelength, the size of electronic components cannot be ignored. The microwave network method equates the microwave components to reactance or resistance devices, and equates the actual guided wave transmission system to a transmission line, thus simplifying the actual microwave system into a microwave network. Electronic components that cannot generate power, such as reactance and resistors, are called passive electronic components, and circuits that include only passive electronic components are called passive circuits. [0003] Scattering parameters (scattering parameters, ...

AI Technical Summary

Problems solved by technology

If the equivalent circuit model does not satisfy the passivity, it will cause the problem that the simulation software cannot achieve convergence in the time domain solution process

Images