https://techcrunch.com/2019/10/24/heres-what-the-pixel-4s-radar-chip-looks-like/

I’ve been tearing my gadgets apart for as long as I can remember. Consoles, phones, printers, whatever — I’ve always needed to see what makes it all work. Sometimes they even work when I put them back together.

As soon as Google announced that the new Pixel 4 had friggin’ radar built in for detecting hand gestures, I needed to see under the hood. While I haven’t picked up a Pixel 4 yet, our friends over at iFixit busted out the heat guns and did what they do best, tearing the Pixel 4 XL down to parts and uncovering the Project Soli radar chip along the way.