2.4G 5.8G mini WiFi Bluetooth dual band antenna for router spiral antenna When the directional gain of the antenna decreases by 3dBi, the corresponding frequency range of the antenna. Any antenna has a band operating range. Different technologies, such as 1G, 2G, 3G, 4G, 5G, 6G. The farther the high gain antenna transmits the signal, the antenna produced by the company can be designed and produced according to the 1-38dBi gain