Hi. I would like to ask about applications of 70 GHz radio in different fields, except cellular comm that already known. Maybe someone can help me

P.S. 70 GHz (E-band) communication system able to work with speed up to 3 Gbit/s on distance about 5 miles (8 km).

Hi Alex87, welcome here!

 

I'm surprised by stiff figures about a throughput and a range. The frequency alone doesn't decide that.

 

Generally, frequencies over 40GHz have a limited range in the atmosphere because of absorption, but would propagate in space.

Then, you have all the uses where a limited range is fine: an intrusion detector, a ranging radar (to park your car), a liquid height meter... There are so many!

 

As components are already good at such frequencies, all traditional uses of GHz are possible excepted long-range transmissions. That's a lot!

 

Do you mean a specific band around 70GHz? The whole spectrum to 300GHz and over is already sliced among possible uses, so each band has one intent: terrestrial communications, mobile communications, amateur, Ism, radioastronomy, and so on. There:

http://www.itu.int/pub/R-REG-RR

contents certainly available on the Web.