LibreVNA 2 ports full VNA 100kHz - 6GHz

359.1

Regular Price: €379.91

Now: €359.10 Excl. VAT

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Product number: ELE005199
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Details

The LibreVNA is an open source USB based vector network analyser with 2 ports. The VNA is an RF frontend with some processing power but everything else is handled in the PC application. The PCB has 3 ADC's and a FPGA for all the signal signal processing. It is able to do 10000 point dual-port measurements within one second and has an effective dynamic range of 100 dB.
Thanks to two measurement ports this vector network analyser can be used to measure the complete set of reflection and transmission coefficients (S11/S12/S21/S22). Although the LibreVNA hardware is designed to be a VNA, the general hardware architecture is so similar to that of a spectrum analyser that simple two-channel spectrum measurements can also be performed.

Important remarks

Due to this being an open source VNA, there are some limitations in the design. These remarks are as follows:
Due to some structural limitations the S12 isolation is 10 dB worse than that of the S21 parameter. Above 3GHz the performance decreases with increasing frequency causing the port isolation to only be 50 dB at 6 GHz. Furthermore, below 1 MHz, the performance decreases with decreasing frequency and the effective dynamic range decreases to 70 dB at 100 kHz. The output power may decrease when frequency is lower than 1 MHz or higher than 3 GHz.
With this VNA the use of higher accuracy calibrators allows for higher precision of measurements.

All in all, this is a powerful VNA for a limited budget. However, it should not be seen as an alternative for a high-end VNA like the SNA5002A from the Siglent SNA5000A series.

The LibreVNA can be calibrated using the LibreCAL. Using the LibreCAL calibrator ensures the most accurate results.

Specifications

VNA specifications
Frequency range 100 kHz - 6 GHz
Test Ports 2
Output power -40 dBm - 0 dBm
Frequency accuracy < 2 ppm
Measurement points 2 - 4501
Measurement bandwidth 10 Hz - 50 kHz
Dynamic range > 95 dB (<3 GHz)
> 50 dB (<6 GHz)
Measurement parameters S11, S21, S12, S22
Impedance 50 Ω
Signal generator specifications
Frequency range 100 kHz - 6 GHz
Output power -40 dBm - 0 dBm
Spectrum analyser specifications
Frequency range 100 kHz - 6 GHz
Input power <-5 dBm
Resolution bandwidth 13 Hz - 112 kHz
Phase noise -103 dBc/Hz (1 GHz, 10 kHz offset)
Power supply DC 5V, 1.5A (USB or 3.5 mm connector)
Supported OS Windows, Linux, MacOS
Dimensions 122 x 98 x 16 mm

Accessories

The LibreVNA comes by default with:

  • USB to USB cable
  • USB to USB-C cable
  • 2x 30cm SMA male to male SS405 RF cable
  • SMA male calibration kit - OPEN
  • SMA male calibration kit - SHORT
  • 2x SMA male calibration kit - LOAD
  • 2x SMA female to female connector
  • 2x SMA male to male connector

Pros and cons

  • Costeffective solution
  • Real 2 ports VNA
  • Limited dynamic range
  • Limited IFBW
  • Trace noise not specified

Downloads

LibreVNA manual
pdf (1.65 MB)Download

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Latest customer reviews

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Review by John 
Posted on 03/11/2026
Experience with the LibreVNA
I decided to try it and I am very satisfied. I am working 200 - 1500Mhz and it is very comfortable in that range. I find the 2-port structure a big advantage over the SV4401A. I have managed to get a Python script to use SCPI control for time gated measurement which is very powerful. It gets hot but it doesn't drift much and when it stabilises it is very repeatable. I typically use 4 averages at 1kHz and the trace noise is negligible. It resolves picoseconds. The GUI is not as user friendly as it might be but it works, it is stable, and you get used to it. In all marvellous value. I tried to purchase the electronic calibration accessory after having good experience with the VNA and Eleshop rejected my order as not meeting their minimum order value!! Well done Eleshop.
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Review by Reinier Gerritsen 
Posted on 07/08/2026
excellent VNA
Great VNA, much better than the NanoVNA types. Much faster, higher dynamic range and higher frequency range. And true dual port. Also the designer of the hardware and the software is very responsive. The only downside is that the unit gets quite hot. I run it from a 5V/2A USB power adapter. Too bad it is not included in the package.
The PC software is very capable but it does take some time to figure out how to use it. It is not always as intuitive as hoped for. But support from Jan is excellent. And the hard- and software is completely open source, so you can modify it to your needs.
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