https://www.wsj.com/articles/beaming-so ... _lead_pos9
In this age of wireless everything, engineers are trying to perform the ultimate act of cord-cutting: generating abundant solar electricity in space and beaming it to the ground, no power cables required.
More than half a century ago, an article titled “Power from the Sun” in the journal Science spelled out the rationale for this high-wireless act. Above Earth’s atmosphere, sunshine is never interrupted by cloudy skies, and there is no day or night. Satellites collecting solar power could theoretically operate around the clock, dispatching emission-free electricity wherever it’s needed, anywhere on Earth. But the concept was long dismissed as too complicated and expensive.
Now it is finally being put to the test.
On Jan. 3, a team at Caltech launched the Space Solar Power Demonstrator, an orbiting suite of experiments to test key components for space-based solar power. It switched on in May and has begun sending back encouraging early results. “People are realizing this isn’t just science fiction,” says Ali Hajimiri, an electrical engineer at Caltech and one of the project leaders on the demonstrator. “There may be a pathway to make this reality.”
