Furthermore, microwave antennas are mesh, not solid. You won't have full sun under it, but neither will it be dark.

That being said, there's a fundamental issue here that without huge improvements in launch costs it's simply not viable unless made out of lunar materials.

And note that it doesn't have to be in a synchronous orbit so long as you permit some movement of the antennas. Put say 25 stations out there and 24 ground stations--they keep hopping to the next station as the Earth rotates underneath, the 25th station is offline because it's in shadow.

A single solar power station can be taken out by a cloudy day.

A million little solar power stations spread across an continent average together into an even power source that provides power for longer than daylight hours.

The higher you run the voltage the more corona loss, the higher you run the current the more resistance loss. And there's a limit to how close you can put the wires to each other before they interfere. The band of land required for the massive power bus is gargantuan.

The proposal for rectenna arrays was grids over farmland which could be used for cattle grazing with illeffects to the cattle - simply not enough EM can be absorbed by them for it to matter.