Radiative Reference Plane Estimation and Uncertainty for THz Path Loss Measurements

A line-of-sight VNA measurement over 300 - 310 GHz with a separation of 10 - 340 cm, at 10 cm intervals was performed. The rms difference between the VNA results and Friis losses, calculated from distance measurements and Power-Delay Profile, was used to optimize the radiative reference plane correction. Optimal results were 10.1 mm (distance measurement) and 8.9 mm (PDP) for each antenna. This correction is significant for separations below 1 m.