Effects mechanism of strong electromagnetic environment to equipment

When facing complex electromagnetic environment, especially strong interfering signals existing, the equipment using frequency always show some unexpected characteristics, such as sensitivity descent, some strange frequencies signals radiating which should not exist. By injection test of some electronic devices, nonlinear effects are proved to be the reason of equipment using frequency working performance descent. Then, the rules of working performance descent, such as cross modulation radiation and desensitization, are researched based on the different setting of strong interfering signals. According to the conclusions of this paper, it's helpful to use electronic equipment reasonably in strong electromagnetic environment.