Mar 11, 2018 LoRa, LoraWAN, Sigfox 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: https://github.com/SensorsIot/Antenna… Stuart’s Page: http://www.loratracker.uk/ and his results: https://github.com/LoRaTracker/Test-R… Watts to dBm converter: https://www.rapidtables.com/convert/p… / http://www.g4urh.co.uk/amateur_radio/… Radio link budget calculator: http://en.jirous.com/calculation-wifi Coax cable loss calculator: http://www.qsl.net/co8tw/Coax_Calcula… Ground plane Calculator: http://www.csgnetwork.com/antennagpca… LoRaWAN Balloon experiment: http://bit.ly/2DgSBUB Moxon Antenna: http://www.moxonantennaproject.com/ Moxon antenna 3D: https://www.thingiverse.com/thing:212… VSWR to dB table: http://bit.ly/2IgrWuI 50$ satelite: http://www.50dollarsat.info/page1.html