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Everything goes wireless these days. This is why we have a close look at the “black magic” of antennas, how they work, what is essential, and how to test them.
Based on this knowledge we will build a cheap antenna tester for LoRa antennas. A similar device can be built to test Wi-Fi antennas.
It uses an ESP32 TTGO board on one side and a Wemos D1 mini with a Hope RFM95 module on the other side.
Links:
Sketches: github.com/SensorsIot/Antenna...
Stuart's Page: www.loratracker.uk/
and his results: github.com/LoRaTracker/Test-R...
Watts to dBm converter: www.rapidtables.com/convert/p... / www.g4urh.co.uk/amateur_radio/...
Radio link budget calculator: en.jirous.com/calculation-wifi
Coax cable loss calculator: www.qsl.net/co8tw/Coax_Calcula...
Ground plane Calculator: www.csgnetwork.com/antennagpca...
LoRaWAN Balloon experiment: bit.ly/2DgSBUB
Moxon Antenna: www.moxonantennaproject.com/
Moxon antenna 3D: www.thingiverse.com/thing:212...
VSWR to dB table: bit.ly/2IgrWuI
50$ satelite: www.50dollarsat.info/page1.html
Supporting Material and Blog Page: www.sensorsiot.org
Github: www.github.com/sensorsiot
My Patreon Page: / andreasspiess
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