abonnyman 2/12/2020 | 11:24:26 AM
Oxygen absorption mmWaves can't get through glass or walls without unacceptable transmit powers. Even outdoors, they're absorbed by oxygen.

There's a lot of oxygen.
pperini 1/27/2020 | 6:12:44 PM
Who wants to buy a mmwave phone? 5G mmWave has many challenges as the initial wireless access technology for today's mobile devices... the low PA efficiency @ 25-40GHz really drains battery life and heats up the device significantly.  The coverage is very limited and does not penetrate well from outside to indoors.  The cost to deploy a dense mmwave network and importantly the cost to operate/power all these inefficient base station PAs is not to be under estimated.  

Let's see how well 5G mmwave phones sell to consumers in the next few years and whether Verizon & ATT see an ROI on their 5G mmwave services. I still think T-mobile's low band strategy is a better way to go as nationwide 5G coverage gives all your subscribers an incentive to buy a 5G phone.  So who wants to by a mmwave 5G phone if you dont live or at least work in the very limitied coverage areas of the deployed cities?  How long will it be before you have mmwave coverage at home and work?

While its probably still early to jump all the way to mmwave frequencies for true mobile access in most areas of the US, in the near term there will be ways for operators to apply mmwave for backhaul in LAA/WiFi hotspots, small cells, a cablebox, etc... using fixed CPE powerd by outlet (or possibly a larger rechargeable battery).  This could help ease WiFi and cellular congestion in areas like airports while not requiring the user's smart phone to support mmwave for access. This can ease installations of wireless access points in some places where running new fiber the last 100m is a challenge.
kaleanna 1/14/2020 | 3:14:13 AM
Thanks I think it is very good, in the future I think there will be more improvements, it is the field I study now. shell shockers
[email protected] 1/9/2020 | 11:30:07 PM
Agreed Doesn't look good at the moment. TMUS deployed mmWave in several cities, but now it trashes it in their commercials (dig at VZ). I get the sense AT&T is taking a pause on mmWave from comments by its chief engineer that I have seen. Verizon appears to be the only one serious about mmWave, but that probably changes this year as it shifts focus to sub-6GHz. Given that it only works outdoors, there is a very limited number of areas that make sense to deploy it. I don't expect to see much movement on it in the next couple of years. I believe carriers will be focused on rolling out broad 5G coverage, acquiring mid-band, and migrating to SA 5G network core. We might see activity for fixed wireless and perhaps private networks for enterprise customers in the meantime.