Prediction Model of In-Band Blocking Interference under the Electromagnetic Radiation of Dual-Frequency Continuous Wave

Kai Zhao,Xiaodong Pan,Guanghui Wei,Yaping Wang

doi:10.1155/2020/7651389

Abstract

Two hypotheses for the blocking effect mechanisms under the electromagnetic radiation are presented, and the corresponding dual-frequency interference prediction models are proposed, which can be used to predict the working state of equipment under the condition that the single-frequency susceptibility is known. By taking a radar and a communication radio as the EUT, the experiments of dual-frequency continuous wave electromagnetic radiation are designed and carried out to verify the prediction models. The test results show that the sensitive bandwidth of blocking interference effect for the tested radar and the communication station is consistent with their working bandwidth, respectively. By substituting the test data into the proposed prediction models, the prediction errors of the models are less than 13%. Moreover, it can be found that the tested radar is more sensitive to the peak value of electric field, and the tested communication station is more sensitive to the effective value of electric field.

Highlights

With the rapid development of information technology and wide application of electronic equipment, the electromagnetic environment is getting worse and worse, which is characterized by a variety of electromagnetic signals overlapped intensively in the space domain, time domain, frequency domain, and energy domain. e working reliability of electronic equipment is seriously threatened
Assuming that the receiver is sensitive to the amplitude of electromagnetic radiation field intensity, that is, as long as the field intensity amplitude of the interference signals is higher than the critical interference field intensity, it will cause effective interference to the receiver. e coupling voltage on the receiver due to the electromagnetic radiation in space is shown in equation (1)
In order to accurately predict the survivability of the electronic equipment under the in-band dual-frequency electromagnetic environment, two hypotheses on the mechanism of the electromagnetic radiation blocking effect to the receiver are presented, and corresponding prediction models are established, respectively

Summary

Introduction

With the rapid development of information technology and wide application of electronic equipment, the electromagnetic environment is getting worse and worse, which is characterized by a variety of electromagnetic signals overlapped intensively in the space domain, time domain, frequency domain, and energy domain. e working reliability of electronic equipment is seriously threatened. Other related researches are mainly from the macro perspective, taking into account the factors that cause interference to the equipment in the complex electromagnetic environment and using the methods of expert evaluation and statistical analysis to evaluate the survivability of the equipment [10,11,12,13,14,15,16,17]. For this reason, based on the blocking jamming mechanism, two in-band dual-frequency prediction models of receiver are proposed, which are verified by the radar and communication station.

Two Types of Prediction Models

Continuous Wave Electromagnetic Radiation Experiment of a Certain Radar

Findings

Conclusion