Research on High-power Pre-Amplifier Based on MSK

With the development of satellite technology, high-power SAR satellites show broad application prospects in the future. The pre-amplifier is widely used in SAR system, which is used to achieve lower-power and fast comparators. In SAR satellite communication, the transmitted signals of different frequencies usually carry different information. The traditional pre-amplifier is used to realize signal transmission in the low power satellite communication system. The traditional pre-amplifier is difficult to meet the requirement of high-power communication. The high-power pre-amplifier based on MSK is designed for high-power information transmission of SAR satellite. The H bridge cascaded multilevel inverter is selected to replace the traditional analog amplifiers. The high-power signal transmission of SAR satellite system is realized by using cascaded multilevel inverter combined with MSK modulation algorithm. The experiments results verify the prototype design is rational and feasible.