802.11n20 802.11n40 有什么区别，CC3200支持吗？

Viki Shi：

40 MHz Channels is an optional feature under WiFi 802.11n. WiFi Devices supporting this feature use 2 adjacent WiFi channels to achieve higher throughputs (typically > 50 Mbps). It requires 2 adjacent WiFi channels to be free and available which is typically not the case in crowded 2.4 GHz Wi-Fi environments.

This feature implementation is done in the WiFi Radio. CC3200 and CC3100 WiFi does not support 40 MHz channels.