Which type of antenna is used in wireless communication?

Omnidirectional antennas transmit and receive RF signals in a 360-degree horizontal radiation pattern, making them ideal for general-purpose wireless access points and client devices where coverage in all directions is needed. This design is the foundation of most Wi-Fi, cellular, and other common wireless infrastructure deployments.

Parabolic antennas are highly directional dish antennas engineered for long-distance point-to-point links, not general-purpose wireless communication.

Uni-directional antennas focus energy in a single direction and are used for targeted point-to-point connections, not broad multi-client wireless coverage.

Bi-directional is not a recognized antenna classification in wireless networking standards - antennas are categorized by radiation pattern geometry, not by transmit versus receive direction.