[Salgak]

Sorry, that was thought about and solved three decades ago.

The microwave beam suggested to beam the power has a peak power density sufficient to raise the temperature of a bird flying completely though the densest part of the beam by about .1 degree centigrade.

A rectenna complex for a SPS is approximately 10-15 kilometers is diameter (it would be oval, due to angular considerations: SPS would be in geosynchronous orbit over the Equator, and since the rectenna, at least in the US and Canada, would be in higher northern latitudes, simple geometry determines the shape. . .).

Besides, if you want to zap cities, just drop big rocks on them from orbit. . . .

[theFIRMbss]

>Sorry, that was thought about and solved three decades ago. ...

Of course! And people
made mirrors for centuries.
Still, Hubble happened...