Hi, Is there some document about PCB antenna design for the BLUE NRG-2? Thanks

You can refer to following App Notes. The AN4819 talks about Balun layout etc

The device requires standard 2.4GHz Bluetooth Antenna

Refer to following documents

AN4819: PCB design guidelines for the BlueNRG-1 device

AN5187: BlueNRG-1, BlueNRG-2 improving robustness

alok,

Thanks for your answer, the documents are very interesting and I'm going to check on them, but I need info about the the best PCB antenna design for the blue nrg, type, dimmension, pcb material, pcb thickness, etc.

Again, thanks.

ANDRÉS FELIPE