Determining Noise Temperature of a Noise Source Using Calibrated Noise Sources and an RF Attenuator

Author

Kang, Tae-Weon ; Kim, Jeong-Hwan ; Lee, Joo-Gwang ; Park, Jeong-Il ; Kim, Dae-Chan

Author_Institution

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

Volume

60

Issue

7

fYear

2011

fDate

7/1/2011 12:00:00 AM

Firstpage

2558

Lastpage

2563

Abstract

A system to measure the noise temperature (NT) of noise sources is implemented in the frequency range of 18-26.5 GHz for the case where noise sources commercially available have only one nominal NT, e.g., 9500 K being equivalent to 15-dB excess noise ratio. For the Y-factor method, two noise sources, i.e., a noise source and another with a radio-frequency attenuator, serve as the standard noise sources. The noise power output of the noise sources are measured using a commercial noise figure measurement instrument. Measurement results are presented, and its uncertainty has been evaluated to be 0.23-0.25 dB (k = 2) .

Keywords

attenuators; calibration; microwave measurement; noise measurement; temperature measurement; NT measurement; RF attenuator; Y-factor method; frequency 26.5 GHz; measure calibrated noise sources; noise figure measurement instrument; noise temperature measuremet; radiofrequency attenuator; temperature 9500 K; Attenuators; Frequency measurement; Noise; Noise measurement; Power measurement; Temperature measurement; Uncertainty; Attenuators; measurement standards; measurement uncertainty; noise; noise measurement;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2011.2130970

Filename

5752850