(my own V1 next to a V2)
First a tiny bit of history. The original nanoVNA that originated with a japanese engineer has seen a lot of interest, eddy555's original NanoVNA design has already been released for several years prior to the current NanoVNA popularity boom, but during those years eddy555 was only selling the product in small quantities as a DIY kitset.
The current low cost NanoVNA's available on the market now are mostly the "hugen" version known as the NanoVNA-H. Hugen is a ham who innovated on eddy555's original open source design, adding features like battery management, improved PCB layout, PC software and extending the frequency range from 300 MHz to 900 MHz. Then a group HCXQS put together and redesigned the low cost VNA and called it V2.
From the product pages:
- Frequency range: 50kHz - 3GHz
- System dynamic range (calibrated): 70dB (up to 1.5GHz), 60dB (up to 3GHz)
- S11 noise floor (calibrated): -50dB (up to 1.5GHz), -40dB (up to 3GHz)
- Sweep rate: 100 points/s
- Display: 2.8'', 320 x 240
- USB interface: Micro USB
- Power: USB, 300mA
- Battery: not included. Includes charging circuitry. User can install a 1000mAh - 2000mAh lithium-ion battery with maximum dimensions 6 x 40 x 60 mm.
- Battery connector: JST-XH 2.54mm
- Maximum sweep points (on device): 201
- Maximum sweep points (USB): 1024
- Port 2 return loss (1.5GHz): 20dB typ
- Port 2 return loss (3GHz): 13dB min
- VNA-QT software supported platforms: Linux, Windows (7+), Mac OS planned
I have had a few of the original NanoVNA and now I have both an original of obtained from Tindie https://www.tindie.com/products/hcxqsgroup/nanovna-v2/ or https://www.alibaba.com/product-detail/S-A-A-2-NanoVNA-V2_1600053848322.html
of the V2 and 'clone' from an alternate source (AliExpress) https://www.aliexpress.com/item/4001055313532.html , all being in China, this blog post aims to show the similarity, or otherwise, of these two and what sort of measurements are possible.
I should point out that the design and all the supporting technical information on these is open source. So it is possible to clone them. That means that the original funds the designers the clones do not (not at this time anyway). The impact is that whilst the original might be properly supported the clones may not.
There have been other open source designs 'ripped off' in this manner and it is the responsibility of the purchaser to ensure that they are not unwityingly supporting piracy of this type.
My review of the devices will follow here.
Images of them as they arrived:
Side by side the clone (from AliExpress):
The clone had a small laser cut acrylic case (these photos are with the protective layer still in place), the pieces are clear.
I will test and compare mine briefly with current devices and the like. A review of this site https://www.rudiswiki.de/wiki9/nanoVNA#SimSmith_Coax_Cable_S11 might be useful.
I have that RF board mentioned with unmodified U.FL connectors.