Challenges in Characterization and Compliance Testing of mm-Wave Phased Array Transmitters for Mobile Communications and Radar Applications

5G mm-wave mobile handset transmission must comply with spectral mask limits set by regulatory and 3GPP standards. These are defined in terms of total-radiated-power (TRP), requiring measurements that sum emissions in all directions. Additionally, there is often interest in monitoring changes in the transmission power of a mobile transmitter for 5G communications or 60GHz radar in various scenarios and conditions, without the ability to access its antenna terminals. This talk discusses these challenges and shows some examples of measurement setups that have been in use or are being considered for more efficient and accurate characterization.