Cantenna
線上計算器：https://www.wikarekare.org/Antenna/WaveguideCan.html
or https://www.changpuak.ch/electronics/cantenna.php原理說明 https://propakistani.pk/2010/03/19/how-cantenna-works-technically/
天線可拆式USB無線網卡 https://www.ruten.com.tw/item/show?21618640818432
or ESP32-S 衍生單晶片開發版 https://www.ruten.com.tw/item/show?22022616912036
or https://www.ruten.com.tw/item/show?21852369943147
