WiFi chip maker Quantenna was at Broadband World Forum in Berlin with a new chipset for 802.11ax mesh repeater networks dubbed the QSR10R-AX. It has three 4×4 802.11ax radios and integrated CPU cores for optimal mesh repeater functionality. The idea is to have one channel, up to 160 MHz of bandwidth in 5.0 GHz, for downlink traffic and another channel for traffic coming the other way, making it a full duplex. The 2.4 GHz channel is the usual both ways chip, but this time it comes with 4 x 4 MU MIMO. This two way coverage, when combined with dynamic power features, makes for a more reliable backhaul, and is supposed to eliminate the need for a wired backhaul –…