I've only started to look into the complexities involved in chip design (for my BitGrid hobby horse project) but I've noticed that in the Nature article, all of the discussion is based on simulation, not an actual chip.
Let's see how well that chip does if made by the fab. (I doubt they'd actually make it, likely there are a thousand design rule checks it would fail)
If you paid them to over-ride the rules at make it anyway, I'd like to see if it turned out to be anything other than a short-circuit from Power to Ground.
They do have some measurement results in figures 6 and 7. Looks like they didn't nail the center frequencies but at mmWave it's reasonable for a first attempt -- they're still missing something in their model though, same as if you did it by hand.
I'm skeptical that these pixelated structures are going to turn out anything better than the canonical shapes. They look cool but may just be "weird EM tricks", deconstructing what doesn't really need to be. Anyone remember the craze for fractal antennas?
Let's see how well that chip does if made by the fab. (I doubt they'd actually make it, likely there are a thousand design rule checks it would fail)
If you paid them to over-ride the rules at make it anyway, I'd like to see if it turned out to be anything other than a short-circuit from Power to Ground.