This part is a kind of semiconductor called AR6003.

Function of this product has Single Chip 802.11n MAC/BB/Radio.

Manufacturers : Atheros

Image and pinout :

Some of the text within the PDF file :

Data Sheet January 2010 AR6003 Single Chip 802.11n MAC/BB/Radio for Embedded Applications General Description The Atheros AR6003 is a single chip, small form factor IEEE 802.11 a/b/g/n MAC/baseband/ radio optimized for low-power mobile applications. It is the 3rd generation WLAN design in the ROCm® family, employing the world's lowest power consumption WLAN architecture in the smallest possible form factor. The AR6003 is a single stream 1x1 802.11n implementation providing improved link robustness, extended range, increased throughput and better performance for an unparalleled user experience. The AR6003 is part of the AlignTM product family. The AR6003 family implements sophisticated design techniques to deliver a solution which will greatly extend the battery life of mobile and embedde [ ... ]

AR6003 PDF Datasheet Download