Long term stability of the NBS design Debye dielectric coaxial line wave shaping filter

摘要

By means of analysis of NBS laboratory notebooks for the period of 1976--1982 in conjunction with recent LANL P14 measurements it is shown that the Model 100-1, S/N 1 Debye Coaxial Line is stable. From the date of its inception in July 1977 to the present, at a temperature of 30 C the transition duration of the filter insertion step response has reexamined a 125.8 ps while the relative dielectric constant has remained at 2.7. Also, capacitance measurements on the NBS--held Model 100-2, S/N 2 have demonstrated that the capacitance has remained at 32.3 pF since 1979.