Which type of antenna is used in wireless communication?

Omnidirectional antennas propagate radio frequency (RF) signals in a 360-degree pattern around the vertical axis, making them ideal for general-purpose wireless access points and client devices that need to communicate with multiple endpoints in any direction. This is the default antenna type built into most Wi-Fi routers, access points, and wireless NICs per the IEEE 802.11 standard deployment model.

Parabolic (dish) antennas are highly directional and are used for long-distance point-to-point links such as microwave backhaul, not for general wireless communication.

Uni-directional (yagi or patch) antennas focus energy in a single direction and are used for point-to-point or long-range directional links, not standard wireless LAN deployments.

Bi-directional is not a recognized standard antenna classification in wireless networking - all antennas are inherently bidirectional in that they both transmit and receive.