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Pocket Arduino Nano based graphical SWR 160-6m bands panoramic VNA antenna analyzer based on AD9850, AD8302 and SGA3386

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sh123/antenna_analyzer_vna

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Arduino antenna analyzer for HF bands

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Pocket Arduino Nano 160 to 6m band VNA antenna analyzer based on AD9850 module for field days. Powered from 9V PP3 battery.

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Introduction

Pocket Arduino Nano based antenna VNA analyzer / plotter can be used to measure antenna SWR from 160m band up to 6m band, real/complex impedance, return loss (s11), draw SWR chart, draw impedance chart.

Next peripherals are in use:

Building:

Use platformio to build and upload.

Supported operations:

  • Details screen - shows various numeric parameters, such as forward/reflected signals, current frequency/band. By rotating rotary encoder user can change the frequency. By short press - change the band, by long press go to next screen.
  • Real time SWR graph screen - shows partially updated SWR plot, plot is updated while user is changing the frequency using encoder, plot is shifted left or right depending on frequency change direction.
  • Frequency sweep screen - shows complete SWR plot, which is updated approximately every second.
  • Real time impedance graph screen - shows real and imaginary part of impedance graphs on the same screen, partical graph update while user is changing frequency with rotary encoder.
  • Impedance sweep screen - impedance graph is updated every second periodically.
  • Settings screen - enables user to change frequency step, which affects both rotary encoder changes and sweep screen, screen contrast, perform calibration.