Is it Ok to put the chip antenna version (453-00045) of the LWB5+ on the corner of my PCB?

Answer

No, the chip antenna version of the Sterling-LWB5+ must NOT be placed on the corner of the PCB.

Ideally, it should be mounted on the middle edge of the board. It can be shifted away from the middle edge in either direction, but it MUST have a minimum 3mm ground plane on both sides of the module, bigger is better.