Part Number:AWR1642BOOST-ODS
The PCB stack up in the Altium files should they be taken as the ones with which the evaluation boards have been made? The reason being they all seem to have different copper thickness and using different inner substrates compared to what is found in page 2 of SPRACG5 – May 2018
TI mmWave Radar sensor RF PCB Design, Manufacturing
and Validation Guide