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AURSINC Upgraded Professional VNA - LibreVNA 100KHz-6GHz USB Based Full 2-port Vector Network Analyzer
LibreVNA is a open-source hardware, USB based full 2-port vector network analyzer (VNA) designed by Jankae, provides a 100kHz to 6GHz ultra-wide frequency range.
Comparable to Lab-grade Nano VNA, Updated 6-layer PCB design that optimizes S12 port isolation and high-frequency port matching.
The ultra-low noise power supply design and the use of 16bit ADC, together with the precision CNC's aluminum shielded housing, achieve up to 100dB of effective dynamics.
Using 3 ADCs to sample data simultaneously and using FPGAs for signal processing, Libre VNA handheld antenna Analyzer is capable of scanning over 10,000 points of full dual-port measurements in less than 1 second
PC Software Control Available
The LibreVNA needs to be used with the host computer software and a separate screen, as it does not have a built-in monitor. LibreVNA provides software for the Windows and Ubuntu platforms. You just need to download and unzip it to run. [github .com/ jankae/ LibreVNA]
Supported Operating System: Windows, Linux, MacOS. (Only 64-bit software is available for now)
LibreVNA Antenna Analyzer Troubleshooting: (If there was an error in the boot process, the "Booting" LED will bling an error code repeatedly)
Error Code - Meaning - Possible Solution
- Code 1 - Failed to detect FLASH memor - Hardware failure, check soldering
- Code 2 - Invalid FLASH content - Perform firmware update
- Code 3 - Failed to configure FPGA - Check FPGA bitstream generator settings
- Code 4 - Hardware initialization failed - Verify that FPGA bitstream and uC firmware are created from the same release
LibreVNA Vector Network Analyzer Supports Full S-Parameters Measurements
In the LibreVNA operating mode, the VNA can measure the complete S11, S21, S12 and S21 parameters. A source signal is generated and alternately applied to the RF ports. This incoming signal at both RF ports is measured, resulting in the four S-parameters S11 and S21(when signal routes to Port 1), as well as S12 and S22(when signal routes to Port 2)
3 In 1 Device: Besides serving as a vector network analyzer, it can also be used as a signal generator or a spectrum analyzer
Important Notes for LibreVNA Network Analyzer
- Note 1: Above 3GHz, the performance decreases with increasing frequency, and the port isolation is only 50dB at 6GHz. Below 1MHz, the performance decreases with decreasing frequency, and the effective dynamic decreases to 70dB at 100kHz.
- Note 2: The use of higher accuracy calibrators allows for higher precision measurements.
- Note 3: The output power may decrease when the frequency is lower than 1MHz or higher than 3GHz.
Packing List
- 1x LibreVNA host x 1
- 2x 30cm SMA male to male SS405 RF cable
- 1x USB type-C data cable
- 1x USB power cable
- 1x SMA male calibration kit - OPEN
- 1x SMA male calibration kit - SHORT
- 2x SMA male calibration kit - LOAD
- 2x SMA female to female connector
- 2x SMA male to male connector
- 1x English manual
Whether you are an RF engineer, a scientific researcher or an enthusiast, the LibreVNA can meet your needs for various RF measurements and microwave network parameter measurements
Project features
- Wide Frequency Range: 100 kHz - 6 GHz
- Dual-Port Measurement: USB Based Full 2-port
- Full S-Parameters Measurements: S11, S21, S12 and S21 parameters
- Convenient USB Connection: Plug and Play
- LibreVNA support Group: groups .io/g/ LibreVNA-support/
QA
Q1: Can it measure s-parameters above 6ghz range?
A1: While the LibreVNA measures S-parameters from 100kHz to 6GHz directly, it can measure above 6GHz using harmonics, although performance decreases at higher frequencies.
Q2: Does it come with calibration standards for accurate measurements?
A2: Yes, it comes with calibration standards to ensure accurate measurements. The product includes SMA male calibration kits for open, short, and load standards, as well as SMA female to female and male to male connectors. It can be edited through the menu: Calibration-Edit Calibration Kit.
Q3: Can its firmware be updated for improved performance?
A3: Yes, the firmware of LibreVNA can be updated for improved performance. It supports firmware updates and loading new microcontroller firmware and FPGA configuration.
Q4: How to install and configure the LibreVNA project, and start using it for radio frequency measurements?
A4: [github.com/jankae/ LibreVNA/releases] The Windows GUI software is open source and runs directly, requiring no installation.
Rustygears
2025-07-31 13:30:56
I design radios as a profession and I’ve used all the high end lab VNAs from the leading instrument makers. Those devices can and do easily cost north of $50K. When I needed a low cost device that was easily moved, I saw many cheap VNAs that weren’t even hobbiest grade. I stumbled on Libre VNA and read multiple reviews, including ones not on Amazon. Then I saw the software that runs on your pc that makes the “front panel†of the instrument was all open source and being actively improved through new (free) releases, so for $600, I figured I’d give it a try and if it didn’t work out, I’d send it back.What a pleasant surprise. It does everything my fancy instrument do, spans a very wide frequency range - up to 6GHz and is light and tiny. It’s built like a tank and is all metal - no plastic bits, so it’s durable, dissipates heat without noisy and failure prone fans and is well shielded. It’s construction is very reminiscent of some of the classic HP RF equipment and is solid. The setup and operation is very simple and straight forward. The only caution is to plug the USB cable that powers it and communicates with the host PC into a usb port that can provide a lot of power. I use a powered usb hub because I have lots of stuff attached to my la-top and that worked fine. I was up and running in only a few minutes after opening the box. The VNA came with calibration standards for SOLT cal and a couple of quality cables. I’d suggest investing in a couple of SMA male to female adapters to save wear on the instrument connectors. SMAs are only good for about 50 connections before they start to degrade. Those adapters are very cheap.
Fonzie Sanders
2025-07-03 20:31:12
So I've been waiting to see a VNA that goes up higher than the Nano widgets and implements real 2-path.This seems to do it!It took me a bit to find the companion software, but after that, things were calibrated and sweeping measurement in a few minutes.The open source software is pretty darn good right from the get-go. A few things with the software are quirky & nonintuitive but basically it will do anything I need...A few things I wish were better:1. The software is kinda hard-coded for older lower resolution displays and previous versions of Windows. I had to tweak resolution and some Windows scaling things to get things useable/as intended.2. There should be a big sticker/warning about plugging this into a USB port without using the "other" power supply feed. The device draws about 7.5W and thustly far exceeds normal USB limits. In my case, I happened to plug it into a "charging-capable" port which was able to power it without damage and without using the other supply feed. I had some good luck. Doing this with other hardware could possibly damage your equipment.3. The isolation isn't great above 3GHz. Oh well, you can't have it all for $600. This is well discussed out there. Seems that one of the folks that sell the open source hardware could make contributions to improve with their own spins.Some others have commented on the unit running very "hot." I would somewhat disagree. It does warm up a bit after prolonged usage, but nothing to cause concern from what I can tell as long as you're using it under typical indoor conditions. The nicely machined case could have used a little more surface area to help with this.Overall, I'm very satisfied with the unit. I hope "they" continue future hardware and software improvements.
Bryan Milliren
2025-06-02 10:50:40
Measures Vector, scaler network parameters, also signal generator and spectrum analyzer in one functional block attached to a windows pc. Interface program is quite intuitive and useful.
V V P
2025-05-08 17:42:04
This Vendor sent a broken Network Analyzer, one of the port had intermittent connection. It can be easily identified by a routine measurements. The vendor had only one (broken) item in stock so I was not able to replace it, and bought the same model from a different vendor. Network Analyzer by itself is very good for the money, and works well from the second vendor. The original vendor received Network Analyzer which I sent back but scheduled to issue a refund only in two weeks.
evh
2025-04-03 09:38:09
Worrysome hot temperature on outside of case in normal operation... and this is in a 70F environment. I would worry about using this in higher temp envirionment. Design needs to be reworked to include a fan, airflow through case, large heatsink .... something.
Aaron Kelly
2025-02-23 18:46:31
Overall, it works pretty well. Much faster sweep than the nanoVNA. Also works fine up to 5.8Ghz, so that's nice. The software leaves a bit to be desired. Most notably for me is the tiny font that isn't adjustable. Be prepared to use a magnifying glass. Other than that and some other UI gotchas, it's fine. I do wish it had a screen on it so I didn't have to keep the nanoVNA as well.It uses all open source software, but written in C++. If you know c++ you could fix the problems. Too bad it's not in a language that I know well.
Torino
2024-12-27 15:42:36
A full 2-port vector network analyzer with frequency range up to 6 GHz is amazing for the price. Unit arrived nicely packaged with everything needed to get started. Video referenced in Amazon listing is a great quick start guide. Ready to take measurements within 30 minutes of opening the box, and I was taking my time. The Windows GUI software is open source and runs directly, requiring no installation. The software prompted to update the VNA firmware upon startup. The firmware update is readily available online and once downloaded, was able to select the update file from within the GUI software and it installed itself quickly. To put things into perspective, a (new at the time) unit I used about 30 years ago having roughly the same capability was about 4 cubic feet in size, weighed about 100 pounds, and cost about as much as a moderately sized house! Looking forward to using this unit for my projects and hobbies.
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