In a wireless network, the antenna can achieve the purpose of enhancing the wireless signal, which can be understood as an amplifier of the wireless signal. Antennas have different radiation or reception capabilities for different directions in space, and according to the directionality, there are two types of antennas: omnidirectional and directional.
Omnidirectional antenna: On the horizontal plane, an antenna with no maximum direction for radiation and reception is called an omnidirectional antenna. Because omnidirectional antennas are non-directional, they are mostly used in the central station of point-to-multipoint communication. For example, if you want to establish a wireless connection between two adjacent buildings, you can choose this type of antenna.
Directional Antenna: An antenna with one or more directions of maximum radiation and reception is called a directional antenna. The energy of the directional antenna is concentrated, and the gain is higher than that of the omnidirectional antenna, which is suitable for long-distance point-to-point communication. For example, in a community, when a wireless connection needs to be established across several buildings, this type of antenna can be selected.