However, the standard was delayed by fierce industry battles. Two competing proposals — (supported by Intel, Broadcom, Atheros, etc.) and WWiSE (supported by Airgo, TI, etc.) — fought for dominance. A compromise was reached in 2006, and the final 802.11n standard was ratified in September 2009 .
Early draft-n adapters from different chipmakers (Broadcom, Atheros, Intel, Ralink) often didn't interoperate reliably. Vendors pushed firmware updates, but compatibility was a mess until the final standard. 4. The Broadcom 802.11n Adapter Family (2007–2012) As the standard matured, Broadcom released several generations of 802.11n adapters. The most famous and widely used models include: broadcom 802.11n network adapter
If you find one in an old laptop today, it will still connect to a modern 2.4 GHz or 5 GHz network (mixed mode), but don't expect speeds above 150-300 Mbps or rock-solid stability. For daily use, any modern 802.11ac or ax USB dongle will blow it away. The Broadcom BCM4322 (2008) was one of the first adapters to support packet injection in monitor mode, making it a favorite for early Wi-Fi penetration testing (with drivers like b43 on Linux). However, the standard was delayed by fierce industry battles
| Chipset | Typical Product Name | Max Speed | MIMO | Bands | Notes | |---------|---------------------|-----------|------|-------|-------| | BCM4312 | Broadcom 802.11n | 150-300 Mbps | 1x1 or 2x2 | 2.4 GHz only | Low-power, cheap — used in many netbooks | | BCM4322 | Broadcom 802.11n | 300 Mbps | 2x2 | 2.4/5 GHz dual-band | Very common in 2008–2012 laptops | | BCM43224 | Broadcom 802.11n | 300 Mbps | 2x2 | Dual-band + Bluetooth 3.0 | Combo card, used in MacBook Pro (2011-2012) | | BCM43225 | Broadcom 802.11n | 300 Mbps | 2x2 | Dual-band | Lower cost variant | | BCM4313 | Broadcom 802.11n | 150 Mbps | 1x1 | 2.4 GHz only | Single-stream, budget laptops | | BCM4331 | Broadcom 802.11n | 450 Mbps | 3x3 | Dual-band | High-end, MacBook Pro Retina (2012) | The Broadcom 802