Beamed power TO orbit?

>
> > Also, for a satellite in a non-GEO orbit, at least three ground
> > rectennas will be required.
>
> Possibly. And they have to be big, perhaps a kilometer across. Still,

Three ground rectennas is the minimum required, and even that will only
work for satellites
in high orbits, above about 10,000 km.

For LEO satellites an extensive network of ground stations is required
to achieve 100% coverage, and that becomes prohibitive.

Alternatively, a GEO relay station would be required.

> the power density is very low. It may be possible to build them from
> aluminium foil for ~3 dollars per square meter; maybe a little less
> or more.
>

Will this technology work for uplink rectennas ?

I am not sure how this would work.