可用于混频器表征的非线性矢量网络分析仪
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中国计量科学研究院 信息与电子计量科学和测量技术研究所北京100029

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TN98TH89

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国家重点研发计划(2017YFF0206202)、国家自然科学基金 (61701469)项目资助


Novel nonlinear vector network analyzer architecture and test bench for mixer characterization
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National Institute of Metrology, Division of Electronics and Information Technology, Beijing 100029,China

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    摘要:

    非线性矢量网络分析仪(NVNA)是一种针对射频微波器件非线性行为表征的测量装置,通过引入一个相位参考信号实现复杂被测对象的相位谱测量,目前主要用于功率放大器(PA)的表征和建模研究。提出了一种基于双相位参考结构的NVNA改进方案,并尝试用于混频器的非线性行为表征研究。该方案采用一个“步进式”的多频正弦信号作为“主”相位参考,以实现高频谱分辨率的多频段测量,同时引入第2个低频谱分辨率的“辅助”相位参考提供各测量频段的相位同步。该方案能够显著提高测量装置的信噪比,具备对多频段、“调制+谐波”复杂被测对象的测量表征能力。实验表明,该方案可以提供小于±0.2°相位谱测量稳定度,能够进行混频器在复杂调制状态下的相位和谐波失真特性分析。

    Abstract:

    Nonlinear Vector Network Analyzer (NVNA) is a measurement setup for characterizing the nonlinear behavior of RF/Microwave devices. It uses a phase reference to achieve the phase spectrum measurement of a complex test target, and is mainly used for the power amplifier characterization and modeling at present. This paper presents an improved twophasereference NVNA setup, and investigates its performance for mixer characterization with nonlinear behaviors. This novel NVNA setup uses a “stepped” multisine as the primary phase reference, to achieve multiband measurement on a dense spectral grid, and uses a second “auxiliary” phase reference on a coarse grid to ensure the synchronization between multiband phase measurements. As a result, the signaltonoise ratio of the test bench can be largely improved, and a complex test target with multiband and “modulated multiharmonic” components can be characterized. According to the experimental results, the proposed method can guarantee a phase measurement stability of less than ±0.2° fluctuation, and achieve the phase and harmonic distortion analysis of a mixer under complex modulation.

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张亦弛,何昭,郭晓涛,黄见明,张子龙.可用于混频器表征的非线性矢量网络分析仪[J].仪器仪表学报,2017,38(10):2477-2483

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  • 在线发布日期: 2017-11-15
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