As of 2023 there are many badly performing clones on the market. V2/3GHz NanoVNA uses parts like ADF4350 and AD8342 which are costly and clones have been cutting costs by using salvaged or reject parts.
See official store and look for V2 Plus4/V2 Plus4 Pro versions only to avoid getting a bad clone. We have stopped selling V2.2 versions since October 2020, so all V2 hardware that are not Plus or Plus4 are not made by us and we can not guarantee performance.
I want to buy a NanoVNA V2 Plus4 to do S parameter measurement of surface acoustic wave (SAW) devices. I need to be able to read the graph as a list of points into the PC and draw and manipulate the curve in Matlab. Would you please confirm that it is possible to do that with NanoVNA V2 Plus4 and its official software?
Hi you can read/download data using the capture s*1/s*2 export of
measured s-parameters. I am using vna_qt.exe for this purpose
Op 18-12-2025 om 10:58 schreef arash.mohammadi via groups.io:
It is possible. nanoVNA V2 Plus4 works nicely with nanoVNA-qt to acquire 1-path 2-port data into Touchstone format when running on a host computer. Those files can be directly used by analysis software.
I don't use it with Matlab but I do this frequently with QUCS-S to analyze and optimize based on measured data. QUCS-S has good interoperability with Octave which generally runs m code like Matlab. I also use it with scikit-rf (Python) in Jupyter Notebook to do time domain transformations, gating, windowing which that rich library supports. I've even implemented TRL calibration that way. Scikit-rf has a lot of flexibility for network manipulation too. It allows embedding, de-embedding and many other useful transforms.
With SAW devices you may not have an issue due to the likely limits on their edge shape and group delay but do be aware that the constant internal self-calibration of the nanoVNA V2 Plus4 puts a limit on how narrow BW, what device group delay, can be measured. See another thread on this forum about that. It may be that there is code that either disables the self cal or slows it down to allow measurement of narrower devices.
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