Quasi-lumped coplanar transmission-line sensors for broadband liquid characterization

Meyne, Nora; Müller-Wichards, Wiebke; Trieu, Hoc Khiem; Jacob, Arne F.

doi:10.1109/eumc.2014.6986527

Cited by 13 publications

(3 citation statements)

References 10 publications

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“…The precise permittivity of materials was extracted from the measured transmission coefficient (S 21 ) obtained by artificial neural networks. In the past, a few methods were used consisting of iterative approaches, linear fitting algorithm, and matrix transformation algorithm, for forecasting the permittivity of unknown dielectric samples. However, these approaches suffer the problems of various convergence difficulties.…”

Section: Complex Permittivity Extraction Methodsmentioning

confidence: 99%

Symmetric coplanar waveguide sensor loaded with interdigital capacitor for permittivity characterization

Sun

Guo

et al. 2019

Int J RF Microw Comput Aided Eng

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This article presents the developing of interdigital capacitor (IDC) based symmetric coplanar waveguide (CPW) sensor to characterize the complex permittivity of unknown dielectric sheets. The symmetric structure is realized by using two identical 3 dB CPW dividers where each branch is loaded with an IDC unit. The proposed method is designed using three, five, and seven fingers of the IDC unit, and the measurement sensitivity is analyzed accordingly. The permittivity of tested samples is extracted by the genetic algorithm. To validate the robust sensing performance of the proposed method, simulation and experimental tests are performed and analyzed, and the accuracy is compared with published values. The proposed method gives the maximum error of 3.42%. With the feature of high-sensitivity, the proposed sensor can be used as an excellent candidate for determining the permittivity of materials in microwave frequencies.K E Y W O R D S coplanar waveguide, high sensitivity, interdigital capacitor, permittivity extraction, symmetric sensor

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Section: Complex Permittivity Extraction Methodsmentioning

confidence: 99%

Symmetric coplanar waveguide sensor loaded with interdigital capacitor for permittivity characterization

Sun

Guo

et al. 2019

Int J RF Microw Comput Aided Eng

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“…Compared to the methods described above, the coplanar strip line is rarely discussed in literature for the use in electromagnetic material characterization and it is still a topic in current research. In [16], a coplanar sensor is used for measuring the permittivity of liquids and a possible accuracy enhancement by using corrugated coplanar structures is discussed. Other described setups are also designed for characterizing liquids [17] and/or require special sample containers [18].…”

Section: Introductionmentioning

confidence: 99%

A novel coplanar probe design for fast scanning of edema in human brain tissue via dielectric measurements

Reinecke

Hagemeier

Ahrens

et al. 2015

Sensors and Actuators B: Chemical

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“…ICROWAVE-MICROFLUDIC devices integrate microwave circuits with microfluidics for quantitative electrical measurement of fluids [1]- [5]. This emerging field has the potential to advance industrial applications of impedance spectroscopy, including point-of-care diagnostics and quality assurance for pharmaceutical and chemical manufacturers [4], [6].…”

Section: Introductionmentioning

confidence: 99%

A Multistate Single-Connection Calibration for Microwave Microfluidics

Orloff

Little

et al. 2018

IEEE Trans. Microwave Theory Techn.

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Abstract-With emerging medical, chemical, and biological applications of microwave-microfluidic devices, many researchers desire a fast and accurate calibration that can be achieved in a single connection. However, traditional on-wafer or coaxial calibrations require measurements of several different artifacts to the data prior to measuring the microwave-microfluidic device. Ideally, a single artifact would be able to present different impedance states to correct the vector network analyzer data, minimizing drift and eliminating artifact-to-artifact connection errors. Here, we developed a multistate single-connection calibration that used a coplanar waveguide loaded with a microfluidic channel. We then used measurements of the uncorrected scattering parameters of the coplanar waveguide with the channel empty, filled with deionized water, and filled with 30 w% (30 grams per liter) of saline to construct an eight-term error model and switch-term correction. After correction, the residuals between measured scattering parameters and with literature-based finite-element simulations were below -40 dB from 100 MHz to 110 GHz. This multistate single-connection calibration is compatible with both wafer-probed and connectorized microwave-microfluidic devices for accurate impedance spectroscopy and materials characterization without the need for multiple device measurements.

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Quasi-lumped coplanar transmission-line sensors for broadband liquid characterization

Cited by 13 publications

References 10 publications

Symmetric coplanar waveguide sensor loaded with interdigital capacitor for permittivity characterization

Symmetric coplanar waveguide sensor loaded with interdigital capacitor for permittivity characterization

A novel coplanar probe design for fast scanning of edema in human brain tissue via dielectric measurements

A Multistate Single-Connection Calibration for Microwave Microfluidics

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