A comparative study of four open-ended coaxial probe models for permittivity measurements of lossy dielectric/biological materials at microwave frequencies

Berubé, Dany; Ghannouchi, Fadhel M.; Savard, P.

doi:10.1109/22.539951

Cited by 99 publications

(44 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The frequency range used in this optimization procedure was 0. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] GHz. This range is larger than the actual frequency range of interest (0.5-20 GHz).…”

Section: Deembedding Model Of the Probementioning

confidence: 99%

“…This is usually done in one of two ways, which are: 1) using reference liquids for direct calibration at the open end of the probe or 2) using mechanical or electronic calibration standards at the connector plane combined with a model of the probe that translates the reference plane to the aperture. The permittivity is then calculated from the reflection coefficient at the probe aperture using standard inverse techniques [17].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Precision open-ended coaxial probes for in vivo and ex vivo dielectric spectroscopy of biological tissues at microwave frequencies

Popovic

McCartney

Beasley

et al. 2005

IEEE Trans. Microwave Theory Techn.

180

120

View full text Add to dashboard Cite

Section: Deembedding Model Of the Probementioning

confidence: 99%

mentioning

confidence: 99%

Precision open-ended coaxial probes for in vivo and ex vivo dielectric spectroscopy of biological tissues at microwave frequencies

Popovic

McCartney

Beasley

et al. 2005

IEEE Trans. Microwave Theory Techn.

180

120

View full text Add to dashboard Cite

“…For measuring the permittivity of liquid solid or powder, many structures using coaxial lines have been reported [10]~ [11]. However, in many cases, a change of the effective permittivity is too small to be observed by using traditional methods.…”

Section: Structure Of the Open Ended Coaxial Sensormentioning

confidence: 99%

Measurement and prediction of dielectric for liquids based artificial nerve network

Luo

Wang

et al. 2010

2010 International Conference on Microwave and Millimeter Wave Technology

View full text Add to dashboard Cite

Effective complex permittivity measurements of liquids are important in microwave engineering, microwave material processing, microwave chemistry, and electrobiology. Artificial neural network computational modules have recently gained recognition as an unconventional and useful tool for microwave technology. Neural networks can be trained to learn the behavior of the effective complex permittivity of the liquids under irradiation of microwave. It can provide a fast and accurate answer to the task when it has learned. In this paper, we present a simple and convenient method for determining the effective complex permittivity. First, we use a resonant coaxial sensor to measure the reflection coefficients, to check its performance, the electromagnetic field distribution near the sensor and the reflection coefficient is calculated employing the frequency dependent finite difference time domain method. Second, we develop an artificial nerve network and enough simulated materials are utilized to train the networks. Finally, the trained network is employed to predict the effective complex permittivity of liquids, and compare the parameter with pure water obtained from Debye's equation. Results are presented and discussed.

show abstract

“…Sensors based on measuring dielectric property changes [6][7][8], such as surface moisture sensors, have been demonstrated as well. Dielectric spectroscopy that measures dielectric properties and their changes has several advantages, including large volume manufacturing and easy integration with control circuitry [9].…”

Section: Introductionmentioning

confidence: 99%

A Radio Frequency Sensor For Measurement Of Small Dielectric Property Changes

Liu

Yue

2012

Journal of Electromagnetic Waves and Applications

View full text Add to dashboard Cite

We propose a sensitive radio frequency (RF) sensor for the measurement of small dielectric property changes. Interference is used to cancel parasitic background signals to improve sensitivity. The device consists of two Wilkinson power dividers, a 180 degree reversephase and an in-phase CPW (coplanar waveguide)-slotline back-toback balun. The small dielectric property changes between de-ionize water and two sets of primary alcohol-water mixtures with different concentrations in terms of molar fractions are measured with clear sensing and identification. The sensor offers almost thirteen times greater sensitivity than conventional transmission lines. Experimental results also show that the lowest detection limit for the molarity of primary alcohol is about 0.25% across the sensitive sensor. Compared with microwave soil moisture sensors the proposed RF device is more sensitive.

show abstract

A comparative study of four open-ended coaxial probe models for permittivity measurements of lossy dielectric/biological materials at microwave frequencies

Cited by 99 publications

References 10 publications

Precision open-ended coaxial probes for in vivo and ex vivo dielectric spectroscopy of biological tissues at microwave frequencies

Precision open-ended coaxial probes for in vivo and ex vivo dielectric spectroscopy of biological tissues at microwave frequencies

Measurement and prediction of dielectric for liquids based artificial nerve network

A Radio Frequency Sensor For Measurement Of Small Dielectric Property Changes

Contact Info

Product

Resources

About