Well this D-Link router shown at CES is "tri-band" (a misnomer, it should be called "tri-channel") so "11 Gbit/s" is just the sum of the maximum data rate achie

Well this D-Link router shown at CES is "tri-band" (a misnomer, it should be called "tri-channel") so "11 Gbit/s" is just the sum of the maximum data rate achievable in 3 different channels (one channel in the 2.4 GHz band, plus two channels in the 5 GHz band), where each channels is as wide as possible (40 MHz at 2.4 GHz, and 160 MHz at 5 GHz), and where each channels uses 4 MIMO streams (ie. 4 antennas transmitting concurrently.) For comparison, the number I quoted in my parent post is just for 1 channel at 80 MHz with 1 MIMO stream. D-Link can claim "11 Gbit/s" because: - first channel at 2.4 GHz is 40 MHz wide (468 data subcarriers) where 802.11ax can operate at 286.8 Mbit/s, multiplied by 4 streams = 1147 Mbit/s - second channel at 5 GHz is 160 MHz wide (1960 data subcarriers) where 802.11ax can operate at 1201.0 Mbit/s, multiplied by 4 streams = 4804 Mbit/s - third channel also provides 4804 Mbit/s 1147 + 4804 + 4804 = 10755 Mbit/s which D-Link's marketing team rounds to "11 Gbit/s." It goes without saying that a typical client WiFi device (phone, laptop) will never reach 11 Gbit/s. For starters it will only use 1 of the 3 channels (4804 Mbit/s maximum) and most devices are 2×2 thus capable of 2 streams (2402 Mbit/s maximum.) Even if they are 3×3 you'd be lucky in real-world conditions to get about one and a half times or twice the bandwidth of one stream.