1. Expanding Performance and Possibilities with 802.11n February 15, 2006

2. 2 Atheros Overview Worldwide leader in providing advanced wireless systems solutions Core competency: next-generation radios in silicon Financial: market valuation > $900M, 2005 annual sales $184M, well-positioned for growth Key technical differentiators n High-performance radio frequency, mixed signal and digital design n Expertise in developing WLAN solutions using standard digital CMOS n Single-chip and RBOM integration

3. 3 PHS, Voice, Mobile Embedded & Outdoor Consumer ElectronicsData Networking: Retail, PC OEM, Enterprise Market Segments 100s of Millions Billions 100 Million +

4. 4 Recent Launches World’s First n Single chip 11ag products (combined MAC/BB/Radio) n Single chip 11g access point JumpStart for Wireless ™ n Simple, secure WLAN Configuration VLocity ™ MIMO n Super G ® with Beamforming & Maximal Ratio Combining Netgear ® D-LINK ® Introducing the AR5006EX & EG with support for PCI Express ™ Introducing the AR5006AP-GS with support for XR ™ and Super G ®

5. 5 AR1900 n World’s first single-chip for PHS AR6000 ROCm ™ Radio-on-Chip for Mobile n First single-chip for solutions for single and dual-band for mobile products AR5007AP-G n The world’s most integrated single-chip 802.11g solution for APs UTStarcom® Atheros® AR6001X BGA Design 100-150 fewer external components Recent Launches

6. The 802.11n Standard Development

7. 7 Stable draft sent to SA Sponsor Ballot 802.11n Standardization Timeline JP adopts EWC specification; JP submits specification to IEEE; IEEE unanimously confirms IEEE Milestones Wi-Fi Alliance Milestones Jan Jun Sep Mar ’07 Apr ‘07 Interoperability Plan Market Requirements Document Due Date Complete draft sent to Exec Committee of IEEE Publication of Final 802.11n Standard

8. 8 Draft 802.11n – Technical Highlights n PHY transmission rates up to 600Mbps n Enhanced efficiency MAC with frame aggregation n Increased range via multiple antennas and advanced coding n MIMO techniques n Spatial multiplexing n Maximal Ratio Combining n Space Time Block Coding n Support for 1 to 4 concurrent data streams n 2.4/5GHz dual band support n 20/40MHz channel support n Mixed mode interoperability with 802.11a/b/g networks

9. The Power of 3

10. 10 Introducing the World’s First Triple-Radio Chip

11. 11 AR5008 Two-Chip Solution AR5416  MAC and BB  Spatial Multiplexing and Maximal Ratio Combining  Legacy 802.11a/b/g support AR5133  3 embedded 2.4/5 GHz radios  20MHz and 40MHz channels  300Mbps PHY rate per band Dual-band Radio MAC Baseband

12. 12

13. 13 3x3 vs. “Antenna Configuration” Simply adding antennas to fewer transmit chains does not equal 3x3 Information Loss

14. 14 4000 sq ft home 3x3 delivers ~50% greater throughput at range 3x3 266 136 89 2x2 185 90 55 % Δ +44% +51% +62% 50 ft 100 ft 150 ft 802.11g 18 0 +44% throughput! +51% throughput! +62% throughput! Signal-Sustain Technology enables significantly greater connection reliability, even as range increases…

15. 15 XSPAN Performance-Price Sweet Spot 2.5 2.0 1.5 1.0 0.5 Normalized Cost and Performance 2x22x33x3 MIMO Performance and Cost 3x44x4 2 streams Cost Performance

16. 16 AR5008 2.4/5 GHz Solutions Also available in single-band designs AP72 Access Point/Router (front) CB72 Cardbus Card XB72 Mini Card

17. 17 Wireless Triple Play with XSPAN Data Data/ Music Data/ Gaming Video Voice

18. 18 XSPAN Summary Atheros 802.11n family will lead with high-performance 3 x 3 configuration n World’s first 3-radio chip n Offering ~50% performance improvement n Providing reliable coverage in even large homes Atheros 3 x 3 expected to lead market with performance/price sweet spot n Highest level of chip and RBOM integration promises low-cost at retail n Added integration in 2006 will enable even lower “mainstream” 802.11n pricing

19. Expanding Performance and Possibilities with 802.11n February 15, 2006