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In this paper, the related concepts of Electromagnetic Interference (EMI) and Electromagnetic Compatibility (EMC) were expounded, the research progress of EMI suppression methods for power converters was summarized, and the future development trend of EMI suppression for power converters was pointed out, for example, EMI suppression method of changing circuit topology, EMI suppression method for improving control strategy, EMI suppression method of optimized driving circuit.

In order to meet the requirements of electronic countermeasure application, the visualization analysis method of information electromagnetic environment was studied. The elements of data operation parameters of electromagnetic environment were put forward, and a comprehensive display system of electromagnetic environment information was developed. Then the dynamic display of radar detection range in complex electromagnetic environment based on GIS was completed.

The power transmission emission test (CE102) is the key to electromagnetic compatibility (EMC) testing. The device exceeded the limit at multiple frequencies in the CE102 test. The analysis was performed to locate the curve. The filter was selected based on the frequency characteristics of the filter components and the DC-DC conversion was performed. The harmonic emission of the switching frequency of the converter was analyzed and effectively suppressed. The filter module circuit was set according to the characteristics of the interference source, the key parameters of the filter module was calculated, the rectification method was formulated, and CE102 test was performed again to determine the accuracy of the rectification plan.

Solving the electromagnetic interference problem of the vacuum tank temperature acquisition system has an important role in improving its field reliability. The interference coupling path is found by simulating the source of electromagnetic interference in the environment, and the component characteristics are analyzed. The problem of electromagnetic interference by improving its own anti-interference ability was solved, and a solution for verification was proposed again.

An high-speed stealth UAV will be developed by an aviation research institute. Data link is an important part of UAV system. In order to have a deeper understanding of data link system, this paper was made through studying many recent academia papers. The basic composition and working principle of UAV data link system was introduced in this paper, the current UAV data link interference and anti-interference technology was expounded, the key problems faced by the development of UAV data link anti-interference technology were summarized, and the future development trend of UAV data link anti-interference technology was pointed out.

Aiming at a better understanding for the physical explanation of amplifier nonlinear distortion and the convenience to get frequency and amplitude range of output signals under condition of multi-frequency input signals, amplifier modeling for nonlinear response based on transfer function is proposed by introducing method for solving the output response in frequency domain and transfer function which is deduced from the gain characteristic. According to the results of simulation example of amplifier, the calculation errors is similar to the traditional Taylor series method by the comparison which shows the approach could effectively reduce the model complexity and save time for calculating output response in frequency domain. The achievements provide amplifier modeling based on transfer function which contributes to the prediction of nonlinear interference in communication system can explain the mechanism for nonlinear phenomena such as the intermodulation distortion and gain compression.