How to Build a Low Cost WiFi Antenna: 7 Steps (with Pictures)
How to Make a Wireless Antenna: 5 Steps (with Pictures) - wikiHow
Adafruit QT Py ESP32-S2 WiFi Dev Board with uFL Antenna Port [STEMMA QT] : ID 5348 : $12.50 : Adafruit Industries, Unique & fun DIY electronics and kits