Method for estimating crosstalk magnitude, caused by electromagnetic interference of external transient state, of PCB microstrip transmission line

Abstract

The invention belongs to the field of estimation and protection of electromagnetic interference in communication engineering, and particularly relates to a method for estimating the crosstalk magnitude, caused by electromagnetic interference of an external transient state, of a PCB microstrip transmission line, wherein the method is for estimating the size of transient state response of a PCB which works normally when the PCB is interfered by external sudden electromagnetic pulses in study of the integrity of PCB microstrip line signals under complex electromagnetic environments in space. The method comprises the steps that a coupling model between a PCB microstrip line and transient state electromagnetic interference in the air is established; the coupling between the PCB microstrip line and the transient state electromagnetic interference in the air is calculated according to the coupling model between the PCB microstrip line and the transient state electromagnetic interference in the air; coupling voltages are added to the microstrip transmission line, and discretization is carried out on a transmission line equation by utilizing an FDTD method; simulation is carried out on a crosstalk equation after discretization by utilizing Matlab, and a crosstalk result is obtained. According to the method for estimating the crosstalk magnitude, caused by the electromagnetic interference of the external transient state, of the PCB microstrip transmission line, the crosstalk of spacial electromagnetic interference on the PCB microstrip line is calculated through a simple method, calculation amount is reduced, and efficiency is improved.

Description

technical field [0001] The invention belongs to the field of estimation and protection of electromagnetic interference in communication engineering. Specifically involved in the study of PCB microstrip line signal integrity in a space-complex electromagnetic environment, the estimation of the transient response of a normally working PCB board when it is subjected to sudden electromagnetic pulse interference from the outside world The method of crosstalk size of PCB microstrip transmission line caused by transient electromagnetic interference. Background technique [0002] The rapid development of integrated circuit technology makes electronic circuits more and more complex, and printed circuit boards (PCBs) are gradually becoming high-density, high-speed, and multi-layered. High speed will inevitably cause the frequency to rise, which will bring high-frequency electromagnetic field coupling. This is the main factor restricting the development of PCB to high speed and high ...

AI Technical Summary

Problems solved by technology

[0006] To sum up: the existing literature on the microstrip line signal integrity research in complex electromagnetic environment is either too much calculation or the research has limitations. Based on this, the present invention proposes a new algorithm based on the reciprocity theorem to calculate Coupling between the space electromagnetic field and the microstrip line, and using the finite difference time domain (FDTD) method to calculate the transient response of the crosstalk on the microstrip transmission line caused by this coupling

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