Directional antenna is relative to omni-directional antenna, which radiates in a certain angle range on the horizontal direction diagram, that is, it is usually directional.

Like omni directional antenna, the smaller the lobe width, the greater the gain.

Directional antennas are generally used in communication systems with long communication distance, small coverage, high target density and high frequency utilization.Dual-polarized antennas are generally used in dual-receiving wireless transceiver equipment, which can be dual-receiving or dual-receiving.

Antenna always company with cable, power splitter, hybrid coupler , directional coupler, combiner in system.