AP is an access point, which means access point; With this access point, computers can surf the Internet, and the commonly used router is AP.

Gain antennas are better understood. This kind of antenna is similar to PA, which can increase the signal strength. For example, for an antenna with a gain of B, the transmitter transmits a signal, and when it reaches the antenna port, the power is A, and the signal intensity after passing through the antenna is A+B..