The 3dB hybrid coupler is a passive device that divides an input signal into two equal amplitude signals with a 90° phase difference. At present, there are mainly 800-2500MHz wide-band 3dB hybrid ...
LoRaWAN is a set of communication protocols and system architectures designed for LoRa long-distance communication networks. LoRa networks are mainly composed of terminals (built-in LoRa modules...