Dense Spectral Grid NVNA Phase Measurements Using Vector Signal Generators

作者：Zhang Yichi^*; He Zhao; Li Hang; Nie Meining

来源：IEEE Transactions on Instrumentation and Measurement, 2014, 63(12): 2983-2992.

DOI：10.1109/TIM.2014.2320831

• Dense spectral grid
• multitone
• nonlinear vector network analyzer (NVNA)
• phase calibration
• vector signal generator (VSG)

This paper proposes a practical approach for dense-spectral-grid phase measurements based on a nonlinear vector network analyzer (NVNA). With the multitone outputs of commercial VSGs as both phase references and standards, a modified NVNA is presented to effectively obtain the phase spectra of modulated RF signals with spectral resolution of 1-100 kHz. Due to the limited tone number of a VSG multitone standard, a multistep phase calibration method is also proposed in this paper for multiplying the calibratable tone numbers in practice. A phase accuracy of +/- 2 degrees has been experimentally achieved with both the VSG-based approach and the multistep phase calibration method at 2.4 GHz on a 1-100-kHz spectral grid.

• 出版日期2014-12
• 单位中国计量科学研究院