Characterization for Multiharmonic Intermodulation Nonlinearity of RF Power Amplifiers Using a Calibrated Nonlinear Vector Network Analyzer

文献类型： 外文期刊

第一作者： Zhang, Yichi

作者： Zhang, Yichi;Guo, Xiaotao;He, Zhao;Huang, Jianming;Nie, Meining;Wang, Lifeng;Yang, Aining;Huang, Hui;Lu, Zhongjun

作者机构：

关键词： Intermodulation;multiharmonic;nonlinear vector network analyzer (NVNA);phase calibration;phase reference

期刊名称：IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES （ 影响因子：3.599； 五年影响因子：3.7 ）

ISSN： 0018-9480

年卷期： 2016 年 64 卷 9 期

页码：

收录情况： SCI

摘要： This paper presents a novel realization of nonlinear vector network analyzer (NVNA) test-bed with a new phase calibration technique, in order to characterize the multiharmonic intermodulation nonlinearity of a radio frequency (RF) power amplifier (PA) under a large-signal modulated input. The NVNA test-bed uses a step recovery diode comb generator as the phase reference, which is driven by a pulsed-RF signal with a high duty cycle of over 99%. Hence all the multiharmonic intermodulation tones of interest can be measured at once. A multisine phase standard provided by a vector signal analyzer is used to calibrate the intermodulation tones at each harmonic on a dense spectral grid. Two harmonic phase standards with different fundamental frequencies are used to synchronize the phase calibration results at different harmonics. The validity of this paper is verified by comparing NVNA measurements with oscilloscope measurements of the same PA under test. This paper can be used to inspect the nonlinearity of RF amplifiers under large-signal modulated excitations in both the frequency and time domains.

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