Abstract
According to the optimization problem of power amplifier output power, linearity and other performance indicators, this paper proposes an improved three-level cascade overall design framework, designed by the load traction method, source traction method and power back-off method for the driver stage and final stage power. The amplifier better improves the output power and linearity of the system and the high-gain pre-stage power amplifier is designed by the small-signal S-parameter method. After the performance analysis, simulation design, physical production and testing of the cascaded power amplifier, the output power of the system is 15W. This paper implements high power, high gain, high linearity power amplifier design, and applies this result to BeiDou Navigation Satellite System (BDS).
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