基于大信号散射函数的线性化建模技术研究  

Research on linearization modeling technology based on large-signal scattering function

作　　者：华晓杰[1] 林茂六[1] 孙洪剑[1] 

机构地区：[1]哈尔滨工业大学电子与信息技术研究院,黑龙江哈尔滨150001

出　　处：《通信学报》2008年第4期20-23,共4页Journal on Communications

基　　金：国家自然科学基金资助项目(60772078)~~

摘　　要：基于非线性大信号散射函数理论,对射频功率放大器在非线性区的非线性特性进行了研究;为使非线性大信号散射函数更接近于传统的散射参数,在弱非线性的前提下,综合运用相位归一化和线性化技术对大信号散射函数进行合理化建模,并证明了在大信号基波激励条件下相位共轭项谐波引起的激励是不可忽略的;最终,利用实际HEMT晶体管的测量数据分析了相位共轭项引起的激励产生的响应失真,并指出后续工作的重点方向。Based on nonlinear large-signal scattering functions theory, some notable characters of RF-amplifier when operated on nonlinear regime were described. In case of weakly nonlinear device, a novel method to combine phase normalization and linearization of scattering functions was presented, which looks similar to classical scattering parameters for modeling nonlinear device under test （DUT）. Moreover, the reasons were analyzed for the distortion of response and relate it with the emergence of conjugate term. Finally, it prove that the response to the conjugate term of the small input excitation is not negligible and conclude with the efficiency of the model.

关 键 词：大信号散射函数 弱非线性 相位归一化 线性化 

分 类 号：TN722.75[电子电信—电路与系统] TN926