WiFi · Networking
Beamforming
Directs a Wi-Fi signal toward a specific client device rather than broadcasting equally in all directions, improving signal strength and reliability for that device.
A standard antenna radiates in all directions — omnidirectional. Beamforming uses multiple antennas and signal processing to focus the RF energy toward a specific client, concentrating the signal where it's needed rather than wasting it in directions with no devices.
The AP probes the client to learn its location relative to the antenna array, then adjusts the phase and amplitude of each antenna's signal so they constructively interfere in the direction of the client and destructively interfere elsewhere.
The result: stronger signal at the client, less interference for neighboring devices, and better performance at the edges of coverage — where a client would otherwise be at the limit of usable signal.
Beamforming works in combination with MU-MIMO: the AP can simultaneously form separate beams toward multiple clients, each receiving a focused signal rather than competing for omnidirectional broadcast capacity.
Beamforming is a standard feature in all Wi-Fi 5, 6, and 7 access points, often branded by vendors under proprietary names (Cisco's Beamflex, Ruckus's ChannelFly, etc.). Explicit beamforming (where the client provides feedback) is more accurate than implicit beamforming (where the AP estimates direction); both are in common use.