In Arduino IDE menu, go to Sketch -> Include Libray -> Add .ZIP Library... and then select the zipped library. After including it, you can add the include headers to your current sketch with Sketch -> ...
This code example demonstrates Infineon's radar presence detection sensor solution for human presence sensing within a configurable distance using the XENSIVâ„¢ BGT60TR13C and BGT60UTR11AIP 60 GHz radar ...