The prospect of robust high performance indoor communications over mmWave frequencies has been raised by recent results including some from the Telecom Infrastructure Project (TIP), a group of operators and technology vendors collaborating on open networks. The appeal is the huge amount of potential bandwidth available, dwarfing both the lower cellular bands and WiFi. The latest WiFi 6E, which extends the previous WiFi spectrum from the previous 2.4 GHz and 5 GHz bands into the 6 GHz range, liberates an additional potential contiguous 1.2 GHz between 5.925 GHz and 7.125 GHz, otherwise being identical to WiFi 6. By contrast, mmWave at the higher frequencies can yield effectively limitless bandwidth and already both the USA and China are on course to…