Calibration of the standard ratio devices of integrated standards at rf and microwave frequencies

The results are given of developments and investigations of an automated apparatus for calibrating attenuators in the frequency range 10 MHz to 18 GHz for use as working attenuation standards. It is shown that automated apparatus for calibrating microwave wattmeters is suitable for calibrating coaxial fixed and stepped attenuators with an error of lower than ±0.02 dB per 10 dB. Translated from Izmeritel'naya Tekhnika, No. 5, pp. 45–48, May, 1997.