Zhang, Y C; Guo, X T; Humphreys, D A; Wang, L F; Zhao, W; Zhang, Z L (2018) Extension of NVNA baseband measurement for power amplifier and mixer characterization under complex modulation. IEEE Transactions on Microwave Theory and Techniques, 66 (2). pp. 1131-1141.

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Abstract

We investigated the baseband measurement techniques of the nonlinear vector network analyzer (NVNA) test bench, aiming to fully characterize the behavior of RF power amplifiers and mixers under complex modulation. In order to extend the baseband measurements, two kinds of NVNA phase reference approaches are developed as alternative solutions, so that the baseband phase measurements can be achieved with those of modulated components at multi-harmonic RF bands. As the first choice, a modulated baseband signal is combined with another modulated RF one to become the desired NVNA phase reference. The second phase reference design comprises a stepped multisine, assisted by a coarse harmonic phase-reference comb to obtain the NVNA phase calibration. To validate these NVNA test bench designs, an RF power amplifier, driven by a large-signal LTE-like multisine, was tested and compared with Digital Real-Time oscilloscope measurements. An RF mixer was used as a second test device to explore the performance of the new Phase Calibration Standard designs

Item Type:	Article
Keywords:	nonlinear vector network analyzer (NVNA), phase reference, phase standard, baseband measurement, power amplifier, mixer
Subjects:	Electromagnetics > RF and Microwave
Divisions:	Engineering, Materials & Electrical Science
Identification number/DOI:	10.1109/TMTT.2017.2752172
Last Modified:	20 Apr 2018 12:18
URI:	http://eprintspublications.npl.co.uk/id/eprint/7868

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