You might remember press releases from AT&T in 2018 that promised a revolution in rural broadband from a technology called AirGig. The technology was described as using millimeter-wave spectrum to shoot focused radio beams along power lines, with the electric field of the powerlines somehow acting to keep the transmissions focused to follow the wires.
AT&T said at the time that the technology could deliver hundreds of megabits of data to rural homes using a network built from inexpensive plastic components mounted on power lines. The last I heard of the technology was this AT&T video released in 2019.
There had been a field trial of the technology conducted with Georgia Power, and the CEO of the electric company was enthusiastic at the time about the technology. AT&T talked about starting the process of manufacturing hardware. And then . . . crickets. There hasn’t been a word on the web about the technology since then.
I saw articles published by IEEE in 2019 that talked about a different broadband-over-powerline (BPS) technology developed by Panasonic. IEEE amended the standard for BPL to recognize Panasonic’s HD-PLC technology. Panasonic claims to have reached 60 Mbps transmissions using the technology but thought they could goose this to several hundred Mbps.
I always wondered how much of the AT&T announcement on AirGig was hype. Timing-wise, the AT&T AirGig announcement came in the middle of the 5G craze where the cellular carriers were trying to gain major concessions from the government to promote 5G. AT&T and the other carriers wanted a lot more spectrum – and they’ve largely gotten it. Perhaps they were using the AirGig to justify more spectrum. But the video shows that AT&T has gotten a pile of patents for the technology, so it seems to be the real deal.
Today’s blog asked what happened, and I hope somebody who knows will say. Did field trials reveal a fatal flaw in the technology? That’s always possible with any wireless technology. Did the technology just underperform and not deliver the promised broadband speeds? Or will AT&T spring a finished technology on the world one of these days?