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: Stuart's Page: and his results: Watts to dBm converter: / Radio link budget calculator: Coax cable loss calculator: Ground plane Calculator: LoRaWAN Balloon experiment: Moxon Antenna: Moxon antenna 3D: :2124434 VSWR to dB table: 50$ satelite: Supporting Material and Blog Page: Github: My Patreon Page: If you want to support the channel, please use the links below to start your shopping. No additional charges for you, but I get a commission (of your purchases the next 24 hours) to buy new stuff for the channel For Banggood For AliExpress: For : %20Spiess/ Please do not try to Email me or invite me on LinkedIn. These communication channels are reserved for my primary job Equipment in my lab: