A method for determining the frequency stirring bandwidth of electrically large metal cavities based on small samples

Abstract

This invention discloses a method for determining the frequency stirring bandwidth of electrically large metal cavities based on small samples, belonging to the field of electromagnetic compatibility testing technology. The method includes the following steps: S1, configuring the test system and determining the test parameters; S2, calibrating the vector network analyzer and saving the real and imaginary parts respectively; S3, calculating candidate stirring bandwidths based on the frequencies within the test band; S4, selecting a bandwidth value from S3, using a non-parametric bootstrapping algorithm to self-sample it into M×N dimensional samples, and organizing them into magnitude values; S5, performing an A / D test on the magnitude values ​​to determine the critical frequency; S6, obtaining the critical frequency cluster corresponding to the candidate stirring bandwidths from S3, calculating the standard deviation, and selecting the candidate stirring bandwidth with the smallest standard deviation as the frequency stirring bandwidth. This method solves the technical problem of lacking an accurate method for determining the frequency stirring bandwidth of electrically large metal cavities under small sample conditions.

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