NanoVNA and Support Circuits
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This page last updated
10/14/2024
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.
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
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
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
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
Will
have several extras if there is interest. WVARC or QRZ info is good.
S11 Component Test Fixture v1.2 Sch.pdf
Description of
