Pulse power amplification circuit, SAR system and circuit control method

The embodiment of the invention provides a pulse power amplification circuit, a SAR system and a circuit control method, the pulse power amplification circuit is applied to the SAR system, and the circuit comprises a gallium nitride internal matching power tube and an output matching circuit; the gallium nitride internal matching power tube is connected with the output matching circuit; the output matching circuit is used for receiving a power signal output by the gallium nitride internal matching power tube and processing the power signal to obtain a radio frequency output signal meeting a set condition, and the set condition comprises that the phase stability of the phase course of the radio frequency output signal meets a first index requirement. 本申请实施例提出了一种脉冲功率放大电路、SAR系统和电路控制方法，脉冲功率放大电路应用于合成孔径雷达SAR系统中，该电路包括：氮化镓内匹配功率管和输出匹配电路；所述氮化镓内匹配功率管与所述输出匹配电路连接；其中，所述输出匹配电路用于接收所述氮化镓内匹配功率管输出的功率信号，对所述功率信号进行处理，得到满足设定条件的射频输出信号，所述设定条件包括：所述射频输出信号的相位历程的相位稳定度满足第一指标要求。