balun (white ceramic part with brown rectangle marking) appears to be on the other side between the chip and via to the antenna<p><a href="http:&#x2F;&#x2F;www.digikey.com&#x2F;catalog&#x2F;en&#x2F;partgroup&#x2F;2-45ghz-balun&#x2F;52562" rel="nofollow">http:&#x2F;&#x2F;www.digikey.com&#x2F;catalog&#x2F;en&#x2F;partgroup&#x2F;2-45ghz-balun&#x2F;52...</a> or similar