Antenna tuning & impedance matching, do i need to connect the IC?
The short answer no - we are trying to match the output impedance from the chip to the antenna for maximum power transfer (usually 50 ohms)

As you seem to be a beginner, I strongly recommend you to read this short guide, it's awesome.
http://colinkarpfinger.com/blog/2010/the-dropouts-guide-to-antenna-design/

I've matched antennas with this guy and just an SMA connector :) 
https://signalhound.com/

Remember when you are performing your match, to encapsulate the antenna in its intended environment, and watch out for any metal from e.g. tables .. near/below the PCB