毫米波相位噪声测试

摘要: 毫米波信号一般采用倍频的方式产生，相位噪声会随着倍频的次数而增大，和低频率相比，毫米波器件相位噪声的测试变得尤为重要。采用频谱仪测试相位噪声，会受到频谱仪自身一些因素的限制，目前单台相位噪声分析仪的最高频率也只有50 GHz。在介绍相位噪声测试技术的基础上，提供了毫米波外部两路混频的测试方案，可以对毫米波器件的相位噪声进行稳定的分析。
- 毫米波相位噪声 /
- 鉴相 /
- 互相关 /
- 混频器
Abstract: In mmwave technology a low frequency is always multiplied to generate a much higher frequency. Phase noise will be also increased and phase noise test will be more important in mmwave band. It is limited with spectrum analyzer method because of some reasons. And phase noise analyzer can only cover up to 50 GHz in a single unit. After the basic introduction of phase noise test technology in mmwave band two external mixer method is provided. Result shows that with this method we can get a stable test result.
- mmwave phase noise /
- phase detector /
- cross correlation /
- mixer

图 1 相位噪声图

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图 2 专门的相位噪声测试选件

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图 3 鉴相器测试法

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图 4 互相关法

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图 5 FSWP两路外部混频

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图 6 两路混频器测试结果

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[1]	IEEE Standard Definitions of Physical Quantities for Fundamental Frequency and Time Metrology—Random Instabilities, IEEE Std 1139^TM-2008
[2]	FSWP_UserManual_en_11
[3]	R&S.phase noise seminar advances in measurement techniques, October-November 2015
[4]	R&S应用手册, 1EF100_2e_2Port_Residual_ Noise_Meas
[5]	R&S内部文档, 相位噪声测试技术
[6]	Gregor Feldhaus and Alexander Roth. A 1 MHz to 50 GHz Direct Down-Conversion Phase Noise Analyzer with Cross-Correlation
[7]	R&S应用手册, 1EF95_0e__FSWP_uncertainty_analysis