> The UWB chip on the Airtag can only help iPhone know how far away it is from the tag. I thought the MMIO antenna array would have indicated a rough direction

> The UWB chip on the Airtag can only help iPhone know how far away it is from the tag. I thought the MMIO antenna array would have indicated a rough direction of the signal. But perhaps that isn't accurate enough to be useful? Since the distance is accurate to a few cm and the iphone is moving, it can use it's own calculated position from the computer vision data to apply multilateration to multiple UWB distance samples over time.