Out-of-band electromagnetic radiation third-order intermodulation blocking interference prediction method and terminal equipment

Abstract

The invention is suitable for the technical field of the electromagnetic interference test evaluation, and provides an out-of-band electromagnetic radiation third-order intermodulation barrage jammingprediction method and terminal equipment. The method comprises the following steps: acquiring third-order intermodulation new frequency through an out-of-band basic frequency point selected from a change curve of a tested frequency-utilization equipment single-frequency electromagnetic radiation critical jamming field intensity along the radiation frequency offset; performing out-of-band intermodulation critical barrage jamming effect test according to the acquired third-order intermodulation new frequency, and determining the third-order intermodulation barrage jamming factor of the frequency offset corresponding to the out-of-band basic frequency point; and similarly, determining the third-order intermodulation barrage jamming factor of the frequency offset corresponding to the preset out-of-band frequency point, and determining a third-order intermodulation barrage jamming effect index according to the third-order intermodulation barrage jamming factor and the jamming field intensity combination, and evaluating the frequency-utilization equipment out-of-band electromagnetic radiation third-order intermodulation barrage jamming effect. The problem that the out-of-band electromagnetic environment adaptability of the frequency-utilization equipment worked in the complex electromagnetic environment is hard to simply evaluate through the single-frequency electromagnetic radiation sensitive testing is solved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic interference test evaluation, in particular to a method for predicting out-of-band electromagnetic radiation third-order intermodulation blocking interference and terminal equipment. Background technique [0002] The frequency equipment has high receiving sensitivity and strong selectivity to the signal frequency. Although the receiving sensitivity can reach above -100dBm, once the frequency of the interference signal is far away from its working frequency, the critical interference field strength will increase rapidly. Generally, a single frequency of 10V / m It is difficult for interference signals to cause blocking interference, but the antenna receives a wide range of frequencies, not only receiving useful signals from frequency equipment, but also strong electromagnetic radiation signals far away from the working frequency. These signals pass through the limiting filter, low noise After...

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Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a method for predicting third-order intermodulation blocking interference of out-of-band electromagnetic radiation and terminal equipment, which solves the problem that it is difficult for existing frequency-using equipment working in a complex electromagnetic environment to simply pass single-frequency electromagnetic radiation Susceptibility test to evaluate its adaptability to out-of-band electromagnetic environment

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