How much do you know about WiFi antennas?

The appearance of the WIFI antenna is usually cylindrical or flaky, and has a connector at the bottom end of the antenna as an energy feeding device, and is connected to an external connector connected to the RF front end circuit of the Bluetooth module. Another external method of antenna is to use a rotatable adapter. The advantage of this method is that the antenna can be rotated according to the needs of the application and the transmission effect [...]