Atheros
| Original headquarters in San Jose, California, under ownership of Qualcomm | |
| Formerly | T-Span Systems, Inc. (1998–2000) | 
|---|---|
| Company type | Public | 
| Founded | May 1998 | 
| Founder | Teresa H. Meng, John L. Hennessy | 
| Defunct | May 2011 | 
| Fate | Acquired by Qualcomm | 
| Successor | Qualcomm Atheros | 
| Headquarters | San Jose, California, USA | 
| Key people | Craig H. Barratt, CEO 2003-2011 Jack Lazar, CFO 2003-2011 | 
| Products | Ethernet, WLAN, Bluetooth, GPS, powerline communications, hybrid wired/wireless, location | 
| Website | atheros.com at the Wayback Machine (archived 2009-03-03) | 
Atheros Communications, Inc., was an American computer networking company independently active from 1998 to 2011. It produced semiconductor chips for network communications, particularly wireless chipsets. The company was founded under the name T-Span Systems in 1998 by experts in signal processing and VLSI design from Stanford University, the University of California, Berkeley, and private industry. The company was renamed Atheros Communications in 2000 and it completed an initial public offering in February 2004, trading on the NASDAQ under the symbol ATHR.
On January 5, 2011, it was announced that Qualcomm had agreed to a takeover of the company for a valuation of US$3.7 billion. When the acquisition was completed on May 24, 2011, Atheros became a subsidiary of Qualcomm operating under the name Qualcomm Atheros.
Qualcomm Atheros chipsets for the IEEE 802.11 standard of wireless networking are used by over 30 different wireless device manufacturers.