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文章提出了一种Ka波段的射频预失真线性化器。它由一个GaAs肖特基二极管和一个电容并联构成,通过一个偏置电阻加入直流馈电,具有增益扩展和相位延迟的特性,并且其增益和相位特性具有可调性,尤其其相位特性可调性更强。将其应用于工作频率为30GHz饱和输出功率为10W的功放,输出三阶交调失真(IMD3)可以改善15dBc以上,此时功放输入的双音激励信号频率间隔为5MHz。该线性化器可调性强、结构简单、成本低廉、易于实现,有着非常大的工程应用价值。
This paper presents a Ka-band RF pre-distortion linearizer. It consists of a GaAs Schottky diode and a capacitor in parallel, through a bias resistor into the DC feed, with a gain expansion and phase delay characteristics, and its gain and phase characteristics with adjustable, especially its adjustable phase characteristics Sex more. Applying it to an amplifier with a 10-GHz saturation output power of 10W, the third-order IMD3 output can be improved by more than 15dBc. At this moment, the frequency of the dual-tone excitation signal input by the amplifier is 5MHz. The linearizer adjustable, simple structure, low cost, easy to implement, has a very large engineering value.