Using coaxial connectors in measurement

Skinner, D.P.

doi:10.1049/pbel012e_ch4

Cited by 2 publications

(4 citation statements)

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“…Our coaxial test fixture design for the liquid permittivity measurements was inspired by the concept outlined in [ 23 ]. The fixture utilized a 7 mm line standard with laboratory precision connectors (LPC-7) [ 36 ]. Its body was machined from a brass rod in an in-house workshop and equipped with two small holes in the wall: first, at the bottom for dosing liquids and, second, at the top, to let excess air out.…”

Section: Experimental Resultsmentioning

confidence: 99%

Meniscus-Corrected Method for Broadband Liquid Permittivity Measurements with an Uncalibrated Vector Network Analyzer

Kalisiak

Lewandowski

Wiatr

2023

Sensors

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We present a novel broadband permittivity characterization method for liquids measured in a semi-open vertically oriented test cell with an uncalibrated vector network analyzer. For this goal, we utilize three scattering matrices measured at different levels of liquid in the cell. With mathematical operations, we remove the effects of systematic measurement errors caused by both the vector network analyzer and a meniscus shaping the top of the liquid samples in such a type of test cell. To the best authors’ knowledge, this is the first of such a calibration-independent method dealing with meniscus. We verify its validity by comparing our results with the data available in the literature and with the outcomes of our previously published calibration-dependent meniscus removal method (MR) for propan-2-ol (IPA), a 50% aqueous solution of IPA and distilled water. The new method yields results comparable with the MR method, at least for IPA and the IPA solution, revealing, however some problems when testing high-loss water samples. Nevertheless, it allows one to cut down on expenditures in the system calibration engaging skilled labor and expensive standards.

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Section: Experimental Resultsmentioning

confidence: 99%

Meniscus-Corrected Method for Broadband Liquid Permittivity Measurements with an Uncalibrated Vector Network Analyzer

Kalisiak

Lewandowski

Wiatr

2023

Sensors

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“…Most of the time, during the calibration process, the entire cable path with all the connectors connected is calibrated together so that insertion loss of the RF connectors can be compensated properly. Furthermore, the uncertainty contributed by the connectors is less than 0.01 dB [13], which is negligible when compared to other sources of uncertainties.…”

Section: A Rf Connectorsmentioning

confidence: 92%

“…Careless assembly, misalignments, overtightening, inappropriate handling, poor storage, and unclean working conditions will increase the uncertainty or introduce errors which affect the measurement accuracy [13]. Most of the time, during the calibration process, the entire cable path with all the connectors connected is calibrated together so that insertion loss of the RF connectors can be compensated properly.…”

Section: A Rf Connectorsmentioning

confidence: 99%

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Investigation of Measurement Uncertainties and Errors in a Radiated Emission Test System

Song

Hui

Sim³

2015

IEEE Trans. Electromagn. Compat.

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Several important measurement uncertainties and errors associated with test receivers and preamplifiers in a radiated emission test system are rigorously investigated. It is found that some defective RF connectors can have abnormal insertion loss (∼0.8 dB in our study) at certain frequencies. Signal synchronization between the signal generator and the test receiver is found to be an important factor in cable attenuation measurements, and an uncertainty of about 0.8 dB is recorded between using and not using signal synchronization. The measurement uncertainty associated with the preamplifier gain variation is found to be as large as 0.47 Db, when the temperature changes from the room temperature (25°C) to 35°C or to 15°C. The results obtained in this study provide additional knowledge to the existing measurement standards used in the industry. They also have important implications for practical measurements in seeking to fulfil industrial measurement standards.

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Using coaxial connectors in measurement

Cited by 2 publications

References 0 publications

Meniscus-Corrected Method for Broadband Liquid Permittivity Measurements with an Uncalibrated Vector Network Analyzer

Meniscus-Corrected Method for Broadband Liquid Permittivity Measurements with an Uncalibrated Vector Network Analyzer

Investigation of Measurement Uncertainties and Errors in a Radiated Emission Test System

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