Study on Electromagnetic Interference Effect of Reconnaissance Equipment Under Complex Electromagnetic Environments

With the development of the electronics and information technology, the electromagnetic environment of the battlefield space is filled with more and more radiation source signals and intentional interference signals. It is of great significance to study the electromagnetic interference (EMI) effect of reconnaissance equipment in the complex electromagnetic environment to grasp the electromagnetic situation of the electromagnetic space. In this paper, influence of exterior environment on frequency-domain and direction measurement performance of typical reconnaissance equipment is modelled and simulated. Then the EMI effect is analyzed and the frequency and direction measurement parameters of reconnaissance equipment is studied. The results show that the parameter measurement error is less than 1.2% when there is no large interference, and when there is inner noise and external interference concurrently, the bandwidth and pitch angle will have a large deviation.