NanoVNA and Support Circuits

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This page last updated 10/06/2024

Gerbers are optimized for OSH Park Fab [3 protos pp $5 / sq-in]
and
JLCPCB  [generally speaking less $ for more parts]

Note:  Some of the original information here was done by Sam Wetterlin - see link below for much more information.
New Information 9/1/2024  https://web.archive.org/web/20181206052548/http://www.wetterlin.org/sam/

Some of this information was moved and updated from VNA Bridge and Support Circuits.

I will have a limited number of PCB's available for all of the projects on this page.
Still have a few Miniature Step Attenuator boards available too.

Revised & New Information

Series Fixture for VE3NEA Ham VNA1.1
SeriesFixture_06102014.pdf
Gerbers:  SeriesFix_06092014.zip
NEW 9/1/2024   Gerbers: Series_Fixture_v2_09012024.zip
I have 6 complete parts kits @ $4.00 ea - local delivery ONLY


Change in v2 only to accommodate smaller SMA jack
Mouser #: 223-CON-SMA-EDGE-S   1 @  $2.52
or Amazon ‎ BN-660022

New notes for v2 Fixture 9/8/2024
Excerpts from some of Sam Wetterlins Documents.pdf

See Sam Wetterlin's webpage for more information on series and shunt fixtures
VNA_Guide.pdf  page 5
Impedance Measurement with the MSA Using the S21/Shunt Method


In-line Attenuators

Gerbers:   Atten v2 09092024.zip

These attenuators use the same
Susumu PAT 1220 Series High Precision Chip Attenuators
as used on the Test Board [below] and the Miniature SMA Step Attenuator
 

Mfr.: Susumu  data sheet link  Susumu PAT 1220_en.pdf
Atten            Susumu #                             Mouser #
 1dB:   PAT1220-C-1DB-T5      754- PAT1220-C-1DB-T5
 3dB:   PAT1220-C-3DB-T5      754- PAT1220-C-3DB-T5
 6dB:   PAT1220-C-6DB-T5      754- PAT1220-C-6DB-T5
10dB:  PAT1220-C-10DB-T5    754- PAT1220-C-10DB-T5

Use one male and one female SMA edge mount connectors.  More info coming soon


Dip Meter Fixture

Gerbers   Dip_Meter_09102024.zip
Reference information:  Fixture_DipMeter.pdf 
Cross Referenced document Fixture_LoZ.pdf

The board has been designed for 1206 parts but I plan to use 0805, either will fit.

Ref Des             Description                                                Mouser Part #
R1, R3  SMD 0805 1/8W 49.9ohm 0.1% 25ppm      667-ERA-6AEB49R9V
R2         SMD CPF 0805 1/8W 10R 0.1% 25ppm     279-CPF0805B10RE
R4         SMD 0805 1/8W 100ohms 0.1% 25ppm      667-ERA-6AEB101V

 More info coming soon.

NanoVNA and SMD Tweezers
Nano_VNA_Tweezers_QEX_11_21

Tweezers [above] Test board [below] from QEX


QEX-2111-Alldread-QEXfiles-rev1.zip
  QEX Supplement

K9IVB version of Test Board

Gerbers VNA_Test_v2_11142021.zip
Note:  the left hand side is based upon the DG8SAQ board with the addition of two thin film attenuators.
The attenuator pads can be shorted out with a wire jumper, also see
In-line Attenuator section, above, for Mouser attenuator part number information.

DG8SAQ Test board information:
VNWA_Experiments.pdf
  DG8SAQ Testadaptor Multi Label.zip
Similar test boards also available on line at Amazon  &  Aliexpress.com

3D printed Box in OpenSCAD format is available with top or just for the DG8SAQ Test board

VNA Test.zip  OpenSCAD source and .stl files

Universal NanoVNA Test Fixture

Gerber files Universal Test Fixt 09192024.zip
Boards have been received from JLCPCB.
Will have several extras if there is interest.  WVARC or QRZ info is good.
My plan is to build several [4 -5] different configurations.
SMA spacing to fit NanoSMA-H4 with male SMA connectors.
See: Basic Mechanical Info better than drill file.

Universal NanoVNA Test Fixture v2 Sch.pdf

Description of Universal NanoVNA Test Fixture.pdf

OpenSCAD 3D printed feet are coming soon

Attenuators and Test Fixtures.pdf  more information.

Nano VNA Test Fixtures - Resistor Values.pdf with Mouser Part #'s

S11 Component Test Fixture [Shunt]

Gerber Files S11 Component TF 09262024.zip
Boards have been shipped from JLCPCB expext next week.
Will have several extras if there is interest.  WVARC or QRZ info is good.

S11 Component Test Fixture v1.2 Sch.pdf


Description of S11 Component Fixture.pdf