一种用于大信号测试的矢量校准快速修正方法  

A Vector Calibration Fast Correction Method for Large Signal Measurement

作　　者：苏江涛[1,2] 郭庭铭 刘军 许吉[1] 郑兴 Su Jiangtao;Guo Tingming;Liu Jun;Xu Ji;Zheng Xing(RF Circuits and System Key Laboratory of Ministry of Education,Hangzhou Dianzi University,Hangzhou 310018,China;Zhejiang Key Laboratory of Large-Scale Integrated Circuit Design,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学射频电路与系统教育部重点实验室,杭州310018 [2]浙江省大规模集成电路设计重点实验室,杭州310018

出　　处：《半导体技术》2019年第8期652-658,共7页Semiconductor Technology

基　　金：国家自然科学基金资助项目(61727804,61701147,61827806,61871161);浙江省自然科学基金资助项目(LY17F010016,LY17F010017,LZ17F010001);电子测试技术重点实验室开放基金项目(614200101010517)

摘　　要：大信号测试系统是评估GaN功率器件的非线性特性的重要手段,而精准的矢量校准是获得稳定可信测试数据的第一步。为了解决毫米波频段矢量校准易随时间增加而失效的难题,对不同的校准方法进行了讨论,并以直通-反射-匹配负载(TRM)校准方法为基础,对校准过程中的误差系数随时间变化的趋势进行了数据分析,提出了一种可以实时快速修正校准模型中误差系数的方法。采用这种方法,失效的校准状态可以在1 min内得到快速修正而恢复初始校准状态;矢量校准的时间稳定度与传统方法相比,可延长10倍以上。该方法有力地保证了大信号测试中数据的一致性,可广泛应用于器件建模和电路设计等领域。The large-signal measurement system is an important method for evaluating the nonlinear performance of GaN power devices, and accurate vector calibration is the first step in obtaining stable and reliable test data. In order to solve the issue that vector calibration is easy to lose effectiveness with time at millimeter wave band, different calibration methods were discussed. Based on the thru-reflect-match(TRM) calibration method, the data analysis of the variation trend of error coefficients with time in the calibration process was carried out, and a method for quickly correcting the drift error coefficients in the calibration model was proposed. With this method, the failed calibration state can be quickly corrected within 1 min to return to the initial calibration state. Therefore, the time stability of vector calibration can be extended by more than 10 times compared with the traditional method. The proposed method effectively guarantees the consistency of data in large signal measurement, hence can be widely applied in device modelling and circuit design.

关 键 词：GAN器件 负载牵引 矢量校准 直通-反射-匹配负载(TRM)校准技术 矢量网络分析仪(VNA) 

分 类 号：TN323.4[电子电信—物理电子学] TM307[电气工程—电机]