This document presents an RF exposure evaluation for the device with FCC ID 2AU4T-TR40, conducted to ensure compliance with FCC regulations outlined in 1.1310. The evaluation assesses the environmental impact of human exposure to radio frequency radiation, adhering to the limits for Maximum Permissible Exposure (MPE) for both occupational/controlled and general population/uncontrolled environments. The Friis transmission formula is employed to calculate power density at a given distance from the device, considering output power, antenna gain, and distance.
The evaluation includes measurements for WIFI 2.4G and LTE bands, detailing tune-up power, antenna gain, and resulting power density. The document concludes that the device meets the FCC/IC radio frequency exposure limits, provided it is operated with a minimum separation distance of 20cm between the equipment and a person's body. The simultaneous transmission of multiple modules is also considered, with calculations demonstrating compliance with MPE limits.