balun (white ceramic part with brown rectangle marking) appears to be on the other side between the chip and via to the antenna http://www.digikey.com/catalog/

balun (white ceramic part with brown rectangle marking) appears to be on the other side between the chip and via to the antenna http://www.digikey.com/catalog/en/partgroup/2-45ghz-balun/52562 http://www.digikey.com/catalog/en/partgroup/2-45ghz-balun/52... or similar