Title :
30-MHz attenuation standard using binary phase modulation method
Author :
Kawakami, Tomoteru ; Nagatuka, Akio ; Yokoshima, Ichiro
Author_Institution :
Electrotech. Lab., Ibaraki, Japan
fDate :
4/1/1989 12:00:00 AM
Abstract :
A 30-MHz attenuation measurement system which uses a ratio transformer as the standard attenuator is constructed and examined. The binary phase modulation method is used. Higher accuracy at low attenuations and easier maintenance are expected in the system than in the conventional system using the piston attenuator. The estimated uncertainty of the system is 0.0015 dB for 0-20 dB. The attenuation measurements made by the system and the conventional system agree within the estimated uncertainties
Keywords :
attenuation measurement; measurement standards; phase modulation; 30 MHz; binary phase modulation; ratio transformer; standard attenuator; Attenuation measurement; Attenuators; Circuits; Frequency; Laboratories; Measurement standards; Phase modulation; Phase shifters; Pistons; Pulse amplifiers;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
