This tiny PCB antenna will make it possible to use your YoctoHub-Wireless-n in a small enclosure without visible antenna. It is only 42mm long, and includes a sticker to fix it on the enclosure.
Be aware of the fact that this antenna has a vertical polarization: the best transmission quality is obtained on the straight line perpendicular to the PCB plan.
This antenna is made by Delock (article 86246).