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本文研制了一款用于毫米波频段,且具有温度补偿功能的模拟预失真器,该预失真器基于3d B电桥、肖特基二极管、微带线和偏置电阻,在外加直流偏置的情况下,产生预失真信号。我们理论分析了线性化器的温度响应并提出一种简单有效的补偿技术。该补偿技术通过调节控制二极管的偏压使其等效电阻不随温度变化,从而实现预失真器的温度补偿。通过ADS软件对该预失真器进行仿真,仿真结果表明,在-20°C到+130°C的变化范围内,该预失真器可提供6.5d B的增益扩张和50°的相位扩张,且随温度变化增益与相位变化小于0.5d B和5°。
In this paper, we have developed an analog pre-distorter for the millimeter-wave band with temperature compensation based on a 3dB bridge, a Schottky diode, a microstrip line and a bias resistor. The predistortion signal is generated. We theoretically analyzed the temperature response of the linearizer and proposed a simple and effective compensation technique. The compensation technology by adjusting the bias voltage of the control diode so that the equivalent resistance does not change with temperature, in order to achieve the temperature compensation of the pre-distorter. The predistorter is simulated with ADS software and the simulation results show that the predistorter provides 6.5 dB gain expansion and 50 ° phase expansion over a range of -20 ° C to + 130 ° C The gain and phase change with temperature is less than 0.5d B and 5 °.