NanoVNA V2 (S-A-A-2) is a 4GHz vector network analyzer (VNA) capable of measuring antennas, filters, duplexers, and amplifiers. It is a new from-scratch design by HCXQS/NanoRFE not based on the earlier edy555 V1 design.

• V2 Plus4 is the latest design which fixes the drift and linearity issues with older versions. It uses our new VNA-R architecture featuring temperature drift cancellation and reduced crosstalk, showing no visible drift in all indoor conditions.
• Compared to other NanoVNA versions, V2 Plus4/Plus4 Pro do not use harmonics for measurements, improving performance significantly, achieving 90% less trace noise, and is the only low cost VNA to give you highly repeatable and reliable measurements comparable to professional instruments. The wide frequency range covers common cellular, Wi-Fi, and IoT bands, as well as HF, VHF, and UHF amateur radio bands.
• NanoRFE's NanoVNAs are supported by the original development team, and provide you with dependable performance and repeatable measurements.
• No noticeable drift, allowing calibrations to be kept for > 3 months (compared to < 30 minutes for other low cost VNAs)
• Lowest measurement noise due to using RF rated parts and factory tuning (see example measurement). V2 Plus4 Pro increases signal to noise ratio further by an adjustable IF filter, improving performance at lower averaging.
• Improved shielding and all-aluminum enclosure of the NanoVNA V2 Plus4 increases its dynamic range to >90dB, achieving similar results as professional VNAs, and allows measuring duplexers.
• S parameters export, custom calibration kit parameters & advanced calibration methods (NanoVNA-QT software)
• TDR / Time Domain measurements allow testing cable length and discontinuities.
• Improved USB protocol allows full speed streaming of measured data to the PC.
• Sold and maintained by original developers, ensuring consistent performance, quality control, and continued updates.

Update: V2 Plus4 versions now available for order: although the components shortage is worsening (original parts are harder to find as low quality counterfeits flood the market), we have finally secured enough ICs for another batch of NanoVNA V2 Plus4s, now available for order from our Fab.to.Lab. Cost of components are still rising, so prices may need to be adjusted in the future. Thank you for your understanding.

Note:As of March 2024 there are many clones of our earlier S-A-A-2 design sold under various names. Beware that most exaggerate their specs, and some variants are highly noisy due to using incorrect or lower quality parts. Update (2023): we have now seen clones that display a false lower noise floor when measured value is below a threshold, which allows a higher dynamic range to be advertised but can introduce measurement errors. See official stores above and look for NanoVNA V2 Plus4 and VNA6000 versions only to avoid getting a bad clone.

Beware that nanovna .com is not owned by the original developers of either V1 or V2 NanoVNAs, and is being used to mislead users into buying clones from one clone manufacturer. These clones are not supported by any updates from the developers, and violate the license conditions of our V2.2 design.

The following stores have sold at least one bad clone.

• Banggood
• Eleshop

• R&L electronics - still selling clones despite being asked not to by the original developers

NanoVNA V2 Plus4

• V2 Plus4 fixes the drift and linearity issues with older NanoVNA/S-A-A-2 based analyzers. It is a complete redesign using our new VNA-R architecture, which features the following improvements:
  
• Temperature drift cancellation, only available in the V2 Plus4 and VNA6000 series, gives you repeatable and reliable measurements, allowing you to keep calibrations for longer (>3 months compared to <30 minutes for earlier versions).
  
• Synthesizer rated for the full frequency range - V2 Plus4 does not overclock the synthesizer or use harmonics, making accurate measurements without interference from spurious signals.
• Factory tuning of each individual instrument allows the V2 Plus4 to have trace noise 90% lower than previous versions, and improved linearity eliminating harmonic response.
• Improved USB protocol allows full speed streaming of measured data to the PC, achieving 4x faster measurement than our earlier S-A-A-2 (6x faster for V2 Plus4 Pro).
• The all aluminum enclosure and improved shielding allows the V2 Plus4 to reach >90dB real dynamic range, achieving similar results as professional VNAs, and allows measuring duplexers.

Features:

• Latest original hardware - each VNA produced is verified by the original designers for performance; supported by all official software and firmware updates
• 4 inch display
• Highest performing VNA 
• Frequency range: 50kHz - 4GHz (6GHz version available at VNA6000)
• High measurement repeatability (<0.1dB typ)
• Automatic internal compensation corrects for drift errors, no noticeable temperature drift
• Low trace noise (<0.03dB RMS)
• High dynamic range (>90dB), can measure duplexers
• 96dB typically achievable (V2 Plus4 Pro, see measurements below)
• Realtime sweep - shows results as sweep progresses, more responsive than other versions
• Fastest update rate - improved USB interfacing allows full speed streaming of measured data to the PC, achieving faster sweep times than other NanoVNA versions (0.25s for V2 Plus4, 0.16s for V2 Plus4 Pro)
• Adjustable IF bandwidth (V2 Plus4 Pro) - allows measuring crystal filters
• Advanced measurement capabilities
• >1024 max sweep points; more points (up to 65535) are possible depending on the performance of your PC.
• Custom calibration kit parameters
• S parameter export
• TDR (time domain reflectometry/distance to fault) allows measuring cable length and discontinuities [example]
• Can display smith chart, return loss, SWR, complex impedance, series equivalent (RC/RL), group delay, and more
• Port length extension/electrical delay
• Enhanced response calibration - improves S21 accuracy
• Supported by latest official firmware, with features:
• Marker delta and marker search allows easily measuring minimums and maximums
• Adjustable ADF4350 output power
• Adjustable averaging
• Up to 4 traces displayed at once
• Can be used standalone or with PC.
• Accepts standard flat-top 18650 lithium-ion battery, includes on-board protection and charging (note: after inserting a battery, connect USB power at least once to activate the battery management IC.)

Specifications:

• Frequency range: 50kHz - 4GHz
• Trace noise: 0.03dB RMS
• Measurement repeatability: 0.1dB typ
• Maximum system dynamic range:
• 90dB, V2 Plus4, AVG=20
• 90dB, V2 Plus4 Pro, BW=1.6kHz, AVG=5
• 96dB typ, V2 Plus4 Pro, BW=1.6kHz, AVG=20
• S11 noise floor (calibrated): -50dB (up to 1.5GHz), -40dB (up to 3GHz)
• Max sweep speed: 0.25s per sweep (V2 Plus4, default settings)
• Max sweep speed: 0.16s per sweep (V2 Plus4 Pro, default settings, BW=10kHz)
• Display: 4'', 480 x 320
• USB interface: USB Type-B
• Power: USB
• Battery: accepts standard 18650 flat-top lithium-ion battery (see below)
• Maximum sweep points: 1024 (with NanoVNA-QT software)
• Port 2 return loss (1GHz): 20dB typ
• Port 2 return loss (3GHz): 17dB typ
• VNA-QT software supported platforms: Linux, Windows (7+), Mac OS
• IF bandwidth: adjustable from 0.8kHz to 10kHz (V2 Plus4 Pro)

Note: NanoVNA 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.

Achievable performance (V2 Plus4 Pro, calibrated, IFBW=0.8kHz, AVG=20)

Measurement comparisons

Several users have tested clones of the NanoVNA V2 design. We also checked out a few clones ourselves. The clones are based on earlier designs intended for either 1GHz or 3GHz, and some have tried to extend the frequency range using harmonics without understanding the design. Furthermore, none of the clone sellers seem to understand the role of the high frequency components and have substituted generic parts, which worsened the trace noise noticeably.

The performance of the NanoVNA V2.2 clones start to degrade before 2GHz, and would not have passed our standard QC requirements for the earliest 3GHz V2.2 version:

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

These clones are sold under various names, some advertising higher specs than others. Be aware that regardless of advertised specs they are all the same hardware.

Some NanoVNA clones use harmonics to exaggerate the frequency range, which gives wrong measurements because the strong fundamental signal at the receiver creates interference at the harmonic frequency, giving a stable but incorrect measurement. These clones usually come in a plastic enclosure to save cost.

If you need a VNA with higher frequency capability, see VNA6000.

All clones are based on the older V2.2 design, which if replicated well can only reach 60dB dynamic range @ 3GHz. Any clones advertising higher performance are exaggerating the specifications and likely perform worse.

Note: Zeenko is not an authorized seller of S-A-A-2/NanoVNA V2 based products, and is using our design without permission after being asked not to several times by the original developers, while also violating the license on our original V2.2 design. These clones exaggerate specifications by pushing components beyond datasheet limits. Please be aware that buying these clones do not support the original developers, and there will be no support or updates for these hardware versions. Thank you for your understanding.

Achievable performance (V2 Plus4 Pro, calibrated, IFBW=0.8kHz, AVG=20)

• Full set includes:
• 1 x VNA main unit
• 2 x 30cm SS405 test cables
• 1 x Calibration kit - SMA male - Short, Open, Load, and Thru
• 1 x USB cable
• 1 x Touchscreen stylus