AIRTAG 2 Take 2: More UWB Teardown

In a recent blog post I took a look at the Apple Airtag2. Airtag 2 Teardown That teardown stopped at the metal layer for the UWB chip, circled in red below. It's not actually just a chip, it has the U2 silicon, RF amplifier and a crystal. The U2 chip top metal looks like this: Now going further let's strip away the metal to get a clearer picture of what's on this device: We see three repeating…