Receiver is an important part of aerospace communication reconnaissance system. With the rapid development of modern electronic technology, modern communication reconnaissance is developing in the direction of extremely wide frequency band, extremely high sensitivity and high power. But the traditional linear power supply system cannot meet these requirements. High frequency DC/DC converter has the advantages of small volume, light weight and high efficiency. It is widely used in the field of aerospace. In the process of voltage conversion and energy transfer of DC/DC converter, the harmonics and noise which were generated by the voltage switching of high-frequency switch and the reverse recovery of output rectifier diode in DC/DC converter will cause serious interference to the receiver and affect the spectral purity of the receiver. In order to obtain high spectral purity of the receiver, the EMC design of DC/DC converter is very important. This paper briefly introduces the mechanism of electromagnetic interference of DC/DC converter and analyzes the principle of input filter and out filter. A set of remote sensing camera power filter based on detailed theoretical analysis are designed, and the calculation accuracy is verified.
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Mu et al. (2024) studied this question.
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