Leakage radiation simulation and prediction method for electronic equipment cabinet

Abstract

The invention discloses a method for simulating and predicting leakage radiation of an electronic equipment cabinet. The radiation field of the measurement surface near the surface of the electronic equipment cabinet is measured by a proximity probe, and the integral between the equivalent radiation source and the measurement field of the radiation of the electronic equipment cabinet is established. Equation model, solve the equation to obtain the equivalent radiation source of the electronic equipment cabinet, and then calculate the relative value of the electromagnetic field at any point in the external space of the electronic equipment cabinet. Measure the actual power of the calibration surface near the surface of the electronic equipment cabinet shell, and obtain the absolute value of the electromagnetic field at any point outside the electronic equipment cabinet after calibration. Because the method of full-wave modeling is adopted, it has nothing to do with the circuit form inside the electronic equipment cabinet, the specific form of wiring and joints, the operating frequency of the equipment, power consumption and current distribution, and has nothing to do with the position of the holes on the surface of the electronic equipment cabinet, The aperture size is also irrelevant, and the prediction of the radiation field is highly accurate.

Description

technical field [0001] The invention belongs to a method for predicting an electromagnetic compatibility environment field, in particular to a method for simulating and predicting leakage radiation from an electronic equipment cabinet. Background technique [0002] Electronic system cabinets inevitably have holes and cracks, which become the main coupling path for cabinets to leak electromagnetic waves, so it is also an important topic for electromagnetic compatibility research. There are usually two methods to predict the radiation field of electronic cabinets: one is to derive empirical formulas based on Babinet's principle. The second method is the combination of the method of moments and generalized network theory to analyze such problems. Based on the transmission line model, according to the equivalent principle and generalized network theory, the field on both sides of the aperture is expressed in the form of the equivalent magnetic current scattering integral, and t...

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Problems solved by technology

[0006] The present invention aims at the problem that the prediction method in the existing electronic equipment cabinet radiation field prediction technology is not universal and the measurement accuracy is not high, and provides a simulation prediction method for leakage radiation of electronic equipment cabinets, which is suitable for electronic equipment cabinets of different sizes and internal structures It has strong versatility and high prediction accuracy

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