4 ms·
I swear Facebook claimed 10G at 30 km, and recently Bridgewave was claiming the same. Facebook was using a custom 33 dBm PA MMIC. Quorvo (or maybe HRL) presen
by madengr 8y ago
I swear Facebook claimed 10G at 30 km, and recently Bridgewave was claiming the same. Facebook was using a custom 33 dBm PA MMIC.
Quorvo (or maybe HRL) presented a 33 dBm GaN MMIC a couple years ago, but it was ~90 nm GaN process which isn’t out yet. Once that’s out, I’d expect >1W at 80 GHz to allow some cool stuff.
- walrus01 8y agoThe hard part is that increased tx power beyond about +18 also increases noise - 33dBm might work for OOK or BPSK modulation with a 5000MHz wide channel each way, FDD, but the commercial 10Gbps radios available now use from 64-128-256QAM to achieve 10GbE in reasonable channel sizes. Using all 5000MHz works, but limits the number of radios you can Colo on one roof. Ever seen the first generation of Bridgewave and gigabeam 71-86GHz radios? OOK modulated for 1GbE. It's also possible FB's tests are using channels even wider than 5GHz with STA from the FCC.