realraum/antpatt

Antenna Pattern Measurement System

Antenna Diagram with NanoVNA and DiSEqC-Rotor

Combining two existing Projects to create an antenna radiation pattern measurement tool

1. Easy DiSEqC: https://www.e-callisto.org/hardware/callisto-hardware.html
2. NanoVNA-Saver (commandline version): https://github.com/spel-oe/nanovna-saver

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TODOs:

• Explain purpose better in readme
• Commit changes made to nanovna-saver (Tempfile + capture rate slow down)
• Tidy up main.py + make OOP better
• Use reference pattern
• Measurement in both rotor directions to save retracting the rotor

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Dependencies:

pip3 install watchdog numpy matplotlib

Setup

Unzip modified nanovna-saver (not committed anywhere yet) unzip nanovna-saver.zip

Connect DiSEqC adaptor and NanoVNA.
Assuming the DisEqC adaptor is /dev/ttyUSB0

Run

run: python3 main.py Instructions will appear on screen

• Rotor returns to start position, press enter when rotor has returned
• NanoVNA will start continuous measurements and rotor will step 1 degree per measurement
• After completing a 150 degree arc the resulting antenna diagram will be displayed on screen

run: python3 show-plot.py xxxdatetime.diagram Show the previous measurements