A 9 dBi LPDA (Log Periodic Dipole Array) antenna is a type of directional antenna known for its wide frequency range and high gain. It typically operates within the 698-2700 MHz frequency range, making it suitable for various applications like 2G, 3G, 4G, LTE, and Wi-Fi. With a 9 dBi gain, this antenna enhances signal strength and coverage, improving both data speeds and overall connectivity.