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http://dx.doi.org/10.6109/jkiice.2018.22.2.330

Flatness Characteristics Analysis Technique of Attenuator Using Thermal Voltage Converter and AC Measurement Standard  

Cha, Yun-bae (Department of Weapon Systems Engineering, Pukyong National University)
Kim, Boo-il (Department of Electrical, Electronics and Software Engineering, Pukyong National University)
Abstract
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.
Keywords
Thermal Voltage Converter; AC Measurement Standard; Attenuator; Flatness; Measurement System;
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