Considering the nonlinear difference of the gain and phase characteristic in solid state power amplifier ( sspa ) , a parallel but imbalanced predistorting adjuster is used and the hardware cost can be reduced 考慮到固態(tài)功率放大器( sspa )幅度和相位非線性特性的差異,該系統(tǒng)采用幅度和相位不平衡調(diào)節(jié)的射頻預(yù)失真結(jié)構(gòu),降低了硬件成本。