We recently established an impedance standard for the D-band. one of the 6G candidate frequencies. However. primary standards are difficult to use for routine calibration because they require multiple impedance standards and a lot of time to calibrate the vector network analyzer (VNA). https://epthysow8b4o.blog-kids.com/35131006/the-mediatory-role-of-challenge-and-threat-in-the-relationship-between-positive-thinking-skills-and-perception-of-excellent-performance-a-study-on-football-players