Wireless radio component specifications contained within beta distributions of iPhone 3.0 firmware reveal support for a new chip enabling low power 802.11n that’s bound for Apple’s third-generation iPod touch. It’s therefore also likely to be included with new iPhone models.

The version of the existing Broadcom chip that supplies WiFi and Bluetooth on existing models jumps from BCM4325 to BCM4329, according to resource files reserved for a third-generation iPod touch. The component upgrade adds new support for 802.11n features, including the ability to find and join 5GHz networks.

New support for 802.11n in the upcoming iPhone and iPod touch models would also provide the devices with additional network speed and reception range features of the significantly faster 802.11n specification, which are related to channel bonding (using two channels at once to double the top reception speed) and MIMO, the ability to use multiple transmit and receive antennas to improve reception speed and range.

The new component should dramatically speed up WiFi throughput and flexibility as AT&T and other UMTS mobile providers also upgrade their 3G networks to take advantage of parallel improvements in mobile 3G speed capacity expected in the new iPhone.