Last week Qualcomm Atheros (QCA) was the first of three companies to announce new 11ac WiFi chips for routers, gateways and whole home DVRs that will significantly improve performance compared to existing 11ac WiFi chips. Broadcom and Quantenna made similar announcements this week and it would not be surprising to see Celeno and Marvell make similar announcements in the coming weeks. Broadcom trumped last week’s announcement by QCA, by announcing what it calls the industry’s first six stream 802.11ac MIMO platform for gateways and routers. The new QCA chips support four streams. Broadcom said specifically that its new 5G WiFi XStream 11ac chips is up to 50% faster than existing MU-MIMO routers and gateways, no doubt meaning those that use…