Dynamic Power Measurement Techniques in Ota Environment for Millimeter Wave Wireless Applications

This paper assesses the time varying power measurement complexities of mmW wireless systems in dynamic scenarios, focusing on advanced radiated power measurement techniques. An important feature typically used in wireless device to mitigate challenges related to human exposure regulatory compliance is Time Average Specific Absorption Rate (TAS) or Time average Power Density (TAPD) at higher frequencies (above 6 GHz). This feature is a good illustration of dynamic scenarios. While TAS measurement is performed in conducted setup at low frequencies, it becomes more challenging, when going higher in frequency (mmW) where in the majority of cases there is no direct access to the antenna port. In this paper multiple radiated Over-The-Air (OTA) systems of power time varying measurement solutions will be presented. The results are illustrated by measurement on one system considered as example.