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This fellow breaks down what would be needed for an effective orbital DEW as well as the challenges that would need to be overcome.

Spoiler: Laser based weapons are doable but, he doesn't think this was done in Hawaii.

Personally, I'm not sure DEW was used in Hawaii but, I do know that the government is hiding something and likely have weapons tech beyond the parameters discussed here. The limitations however are due to the nature of the universe so even if the gov has better this video should still apply. The question becomes how did they overcome the limitations and to what degree.

This fellow breaks down what would be needed for an effective orbital DEW as well as the challenges that would need to be overcome. Spoiler: Laser based weapons are doable but, he doesn't think this was done in Hawaii. Personally, I'm not sure DEW was used in Hawaii but, I do know that the government is hiding something and likely have weapons tech beyond the parameters discussed here. The limitations however are due to the nature of the universe so even if the gov has better this video should still apply. The question becomes how did they overcome the limitations and to what degree.

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[–] • 1 pt

He actually did go over focusing mechanisms both standard as well as active to counter divergence in the beam as well as the turbulent refraction from the atmosphere.

He also didn't say that a non convergent beam was the objective, quite the opposite. He stated that all forms of electromagnetic radiation diverge from their source. This is true no matter the source or the frequency of the emissions. That's just the way the universe works. Thus the need for focusing hardware as he discussed.

Beam steering is a good point though. This technology is just fucking magical, using constructive/destructive interference to put the power where you want it… The physics behind it are pure beauty.

The video is not exhaustive, it doesn't cover other effects such as wavelength dependant transmissivity, or atmospheric scattering/absorption. These things (and I'm sure there are more things to consider) would be much more minor for power per surface area unit2 in a composite bulk material.