RE: He buys companies like others snack between main meals30 Sep 2021 11:17
" . . . 128th order Dynamic Polarization enables one 1.8 Tbps LEOSat to relay . . . "
The problem I have with mm wave communications, is the range and atmospheric limitations as you go up in Frequency. The guy's who come up with these ideas probably have multiple degrees in Engineering and Science, whereas my experience comes from working with line of sight microwave terrestrial links. It's getting around to 12 years since I did any work involving microwave radio, but I saw issues over much shorter distances than those involving satellite communication. On Terrestrial links, planners use a program that calculates link budget based on expected rainfall, terrain, etc, etc; The idea is to calculate dish gain and required attenuation to prevent interference between dishes on the same tower, so it's all about launch power, Dish gain, rain fade, multi path interference, etc. I just don't see how using mmwave over long open air distance will be feasible.
Short distances mmwave, no problem, you could have antenna's on every street corner, and even use cars to communicate with each other, as well as the fixed network, but 500km Terabit communication, i'm really dubious. How many antennas you role out, and what frequencies you use to provide bandwidth, will depend on economics, location, etc. As I've said previously, I see 6G as an add on to 5G, with much of the eventual "New 6G network", being rebadged 5G.
It will all come down to Physics/cost/benefit in the end, with City Centres, shopping Centres, stadiums, and events being the first to use the higher mmwave frequencies/bandwidths. Just my opinion.