Electromagnetic Compatibility Predict Based on the Forth Class Key Antenna Model

At present, the electromagnetic interference problem is serious between the airborne electronic equipment increasingly. The compatibility analysis and forecasting among devices are the premise to guarantee the equipment to work normally. This paper puts forward a method to predict electromagnetic compatibility among systems using the model of forth class key antenna. This model can simulate antenna pattern better, without actual measured datas. This paper takes horn antenna as an example, and the fitting effect had been verified by simulation experiment, and we draw the conclusion through the examples: the mutual coupling value by forth class key antenna model can be used to calculate antenna coupling energy in the electromagnetic compatibility forecast between systems, the mutual coupling probability value can be used as the probability gist of electromagnetic compatibility prediction accuracy.