• Proceedings of the Korea Electromagnetic Engineering Society Conference
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• 2001.11a
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• pp.310-314
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• 2001

측정의 소급성과 신뢰성을 확보한다는 전제하에 오차의 개념을 버리고 측정시의 측정불확도를 분석하는 것이 측정과학에 있어서 세계적인 추세이다. 본 논문에서는 전달표준인 열전압변환기를 사용하여 고주파전압계의 정밀 교정에서 불확도를 산출하기 위하여 수학적 모델을 설정하고 측정에 관계되는 모든 불확도 요인을 분석하였다. 케이블의 영향과 열전대감지기와 직류전압계의 상관관계, 직류소스, RF소스, 감쇠기, 반사계수와 DUT 등 측정에 있어서 관계되는 모든 불확도요인을 분석하여 확장불확도를 산출하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.2
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• pp.330-337
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• 2018

This paper proposes a technique to analyze the flatness characteristics of the attenuator at 10Hz to $50\text\tiny{MHz}$ on the basis of $1\text\tiny{kHz}$ using a Thermal Voltage Converter and AC measurement standard. In the proposed technique, the input voltage of the attenuator for each measuring frequency is supplied at the same rate as $1\text\tiny{kHz}$ using TVC, and the flatness characteristics of the attenuator are analyzed by the voltage variation indicated in the AC measurement standard. The results of the analysis of the attenuator flatness characteristics show that the maximum uncertainty of $866{\mu}V/V$ can be measured from $10\text\tiny{dB}$ to $70\text\tiny{dB}$ and the uncertainty is reduced by about 37% compared to $2.31\text\tiny{mV}$/V using the network measurement method. The improved attenuator flatness characteristic values can be applied to the frequency flatness calibration from 2.2V to 2.2mV at the low voltage of the AC measurement standard.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.13 no.1
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• pp.47-52
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• 2002

It was virtually declared that measurement science must abandon the error analysis of measurement when ISO had published "Guide to Expression of uncertainty in Measurement" International inclination of measurement field in order to guarantee the traceability and confidence of measurement results discards the error concept and instead analyzes the measurement uncertainty. In this paper we establish a mathematical model of measurement and analyze all uncertainty factors as possible as for yielding the measurement uncertainty in the course of the calibration of RF multimeter using Transfer Standard, Thermal Voltage Converter We produce the expanded uncertainty by analyzing cable effects, correlation of thermocoupler and DC meter, DC source, RF source, attenuator, reflection coefficients and DUT.s and DUT.