Vector Network Analyzer

nanoVNA hardware versions

The original nanoVNA by edy555

a single Si5351A clock
three SA612AD mixers (reference, port 0 + 1)
resistor bridge for port 0 “reflection”
stereo TLV320AUC3204 analog-to-digital converter
- left, right channels for inline, quadrature
- three internally-switched single-ended input (IQ)pairs for reference, ports 0 + 1

Other hobbyist VNA, antenna analyzer, and software defined radio designs
share many of these design concepts.

edy555’s open source design (https://github.com/ttrftech/NanoVNA) was in limited distribution as a kit.

nanoVNA-H

commercialized by Hugen reduced cost and enhanced usability

working LiPo
refined touch screen
better PCB layout, RF shielding
third harmonic operation 300-900MHz
Touchstone file export
standalone PC software

At least 5 nanoVNA-H implementations

black, shields, USB-C

Hugen’s @ gen111.taobao.com and close clones

white, micro USB “gekko”

initially most available on eBay

black, unshielded, USB-C, missing CH0 script

AKA “Worse clone”

Variations may come

with or without batteries,
battery leads soldered or by connector,
better or worse calibration kits,
SMA connectors fully soldered or not,
different firmwares,
calibrated (touchscreen and/or OSLT) or not.
rear cover shielded or not
Many vendors may ship different units over time.

hugen@…

Two bad clones have been found, they have failed to understand the role of bridge and shielding, and made some bad modifications to facilitate manufacturing.

NanoVNA-H v3.3

5.1K Type-C CC resistors

Hugen mid-October 2019

full case

NanoVNA-H v2

“NanoVNA 2”

Different from “NanoVNA-H V2″…
From original nanoVNA inventor Tomohiro AKA edy355, per this message
J.R.R. Tolkien: “Those who approve of courtesy (at least) to living authors”