IMP003: Can you recommend LC components kit for antenna matching?

I am new to antenna design. It seems I need high-Q components. Can you advice?

Murata’s LQP15 series are what we use in the imps (0402 size). What are you trying to do, exactly? To determine a match generally requires rather a lot of equipment…

For our IMP003 prototype I made the mistake to order regular inductors.
In case I have access to a Vector Network Analyzer I can match the impedance of the antenna to the radio. It is likely that the ground around the PIFA is not exactly the same as in reference designs.