Uncertainty evaluation of a broadband attenuation standard

Author

Lee, Joo-Gwang ; Kim, Jeong-Hwan ; Park, Jeong-Il ; Kang, Ung-Taeg

Author_Institution

Electromagn. Wave Group, Korea Res. Inst. of Stand. & Sci., Daejeon, South Korea

Volume

54

Issue

2

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

705

Lastpage

708

Abstract

A standard step attenuator has been developed. It comprises a build-up chain of ten steps of power ratio measurement and operates in a frequency range of 10 MHz to 18 GHz. The overall system has a dynamic range of 90 dB and an expanded uncertainty of 0.006 dB (k=2). The system is used as an attenuation standard in a series radio-frequency substitution scheme. The uncertainty factors in the attenuation measurement of 40 dB at 5 GHz are fully described. For the calibration of a typical step attenuator, the expanded uncertainties are 0.011 dB for the attenuation range up to 80 dB, including the mismatch uncertainty.

Keywords

attenuation measurement; attenuators; measurement standards; measurement uncertainty; power measurement; 0.010 to 18 GHz; attenuation measurement; broadband attenuation standard; microwave attenuation; microwave measurement; mismatch uncertainty; power ratio measurement; radiofrequency substitution scheme; step attenuator; uncertainty evaluation; uncertainty factors; Attenuation measurement; Attenuators; Calibration; Dynamic range; Power measurement; Radio frequency; Standards development; Switches; Thermistors; Uncertainty; Calibration; microwave attenuation; microwave measurement; uncertainty;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2004.843336

Filename

1408269