About NanoVNA V2

NanoVNA V2 (S-A-A-2) is a vector network analyzer (VNA) capable of measuring antennas, filters, duplexers, and amplifiers.

Where to buy

NanoVNA V2

Official stores

Safe places to buy an original NanoVNA V2:


Beware of underperforming clones

As of May 2022 there are many clones of an outdated hardware version sold under various names, many of which do not meet specifications and are highly noisy due to using incorrect or lower quality parts. Some users have also reported software/firmware incompatibility. See official stores above and look for NanoVNA V2 Plus4 versions only to avoid getting a bad clone. See also FAQ | How to avoid a bad clone.

We tested a few clones of the NanoVNA V2 design, some claiming higher specifications than the original. The clones are based on earlier designs intended for either 1GHz or 3GHz, and some clones have tried to extend the frequency range using harmonics without understanding the design, while substituting lower quality parts to reduce cost. What we saw was worsened noise, nonlinearity error, and temperature drift issues.

Here is the S11 trace noise compared to the original S-A-A-2 (NanoVNA V2.2) and Plus/Plus4 versions. The performance starts to degrade before 2GHz, and would not have passed our standard QC procedures for the earliest 3GHz V2.2 version.

LiteVNA (NanoVNA V2 clone)

Note: the above plots are uncalibrated to show the amount of noise of the raw data from the hardware.

Other users have done their own comparisons with similar results.

LiteVNA (V2 clone) S21 noise (source)

The following stores have sold at least one bad clone.

Note: Hugen/Zeenko is selling S-A-A-2 based designs without permission and in violation of our non-commercial license, with exaggerated specifications. The original V2_2 design was open sourced to help hobbyists learn, but Zeenko's actions force us to close source later designs. Please reconsider supporting this vendor.


Comparisons with professional VNAs

Users have compared our V2 Plus4 with professional instruments.

Here is one blog post comparing it with a Keysight FieldFox:

https://ae5x.blogspot.com/2021/07/1-to-4-ghz-nanovna-2-plus4-vs-keysight.html

Comparison with HP-8753E:

https://www.dd1us.de/Downloads/Brief comparison of NanoVNA V2 with a professional VNA HP-8753E.pdf

Example measurements

LiteVNA vs V2 Plus4 dynamic range
LiteVNA vs V2 Plus4 measurement

User groups / Forums

Discussion forum
https://groups.io/g/NanoVNAV2

This is the only official users group. Be careful and note the URL is NanoVNAV2.

Facebook
https://www.facebook.com/nanovnav2/


Specifications

The specifications below apply only to devices manufactured by HCXQS or NanoRFE.
Beware of clones using lower quality or salvaged parts.

Parameter

Board version

Specification

Conditions

Frequency range

V2_2, V2 Plus

50kHz - 3GHz

-

V2 Plus4,
V2 Plus4 Pro

50kHz – 4.4GHz

-

Frequency resolution

All

0.01MHz

-

System dynamic range
(calibrated)

V2_2, V2 Plus

70dB

1GHz

60dB

3GHz

V2 Plus4

90dB

1GHz
BW=6.2kHz, AVG=20

80dB

3GHz
BW=6.2kHz, AVG=5

V2 Plus4 Pro

90dB

1GHz
BW=1.6kHz, AVG=5

80dB

3GHz
BW=1.6kHz, NO AVG

S11 noise floor
(calibrated)

All

-50dB

f < 1.5GHz

-40dB

f < 3GHz

Sweep points

V2 Plus4

1 – 1024 points (with NanoVNA-QT software). More points (up to 65535) are possible depending on the performance of your PC.

Note: beware of clones that interpolate calibration to extend the number of sweep points on-device beyond 201 points, compromising accuracy, especially when using test cables.

-

Sweep time

V2 Plus4

0.25s

Default sweep settings

V2 Plus4 Pro

0.16s

Default sweep settings
BW=10kHz

Power supply

All

USB, 4.6V – 5.5V

-

Supply current

All

500mA typ

No charging

Battery current, charging

All

1.2A typ

-

Battery capacity

V2 Plus4,
V2 Plus4 Pro

3200mAh

-

Operation ambient temperature

All

0℃ - 45℃ *

* by design, not tested in production

Ambient temperature during battery charging

All

10℃ - 45℃

-

Note: V2 Plus4 Pro now allows measuring crystals by an adjustable bandwidth setting. All other hardware versions can not measure crystals because of the rapid switching of the test signal.

Basic usage



VNA basics

A VNA (Vector Network Analyzer) measures the frequency dependent reflected and transmitted power of a high frequency network (RF Network).

The NanoVNA V2 measures the following:

The following items that can be calculated from these can be displayed:

Required components

To use the NanoVNA V2 for one port measurements (e.g. antenna impedance), you will need the following:

Performing measurements

The basic operation and menu structure of the NanoVNA V2 is very similar to the original NanoVNA.

Documentation

User manuals

User Manual for all V2 versions

V2 Plus4 User manual by NC4BR

Menu maps

Menu Map for all V2 versions

V2 Plus4 Menu Map by NC4BR

Firmware downloads

For firmware releases go to the Hardware versions page which lists the latest stable firmware builds for each hardware variant.

There are also experimental firmware releases at downloads.

Firmware sources are at https://github.com/nanovna-v2/NanoVNA2-firmware

Software

See Software downloads.

Schematics and PCB layout

The schematics and PCB layout files of the V2.2 version are available here:

https://github.com/nanovna-v2/NanoVNA2

The design is licensed under CC-BY-NC-SA and commercial use without specific permission is forbidden. You need to obtain specific written permission every 3 months to sell hardware using this design.

V2.3 and V2.4 designs are confidential and proprietary, and reverse engineering is forbidden.