Journal Article measurement uncertainty Calibration millimeter-wave wireless communications uncertainty vector network analyzer wireless system 7440-57-5 Biocompatible Materials Coupling corrections Digitally modulated signal Ethane Gold L99N5N533T Research Support, Non-U.S. Gov't channel-sounder verification large-signal measurements load–pull measurement microwave microwave calibration on-wafer measurement over-the-air (OTA) measurements over-the-air testing predistortion reverberation chamber sensitivity analysis traceability uncertainty analysis wireless systems