Proant Dual Band Niche antenna licensed to Raspberry Pi
For the second time, Proant antenna technology is present on the annual Raspberry Pi product release. The Pi B+ uses a Proant designed antenna for 2,4 and 5 GHz radio.
More info @Raspberry.org:
https://www.raspberrypi.org/blog/raspberry-pi-3-model-bplus-sale-now-35/