Improved Split-Ring Resonator for Microfluidic Sensing

Rowe, David J.; al-Malki, Sultan; Abduljabar, Ali A.; Porch, Adrian; Barrow, David A.; Allender, Christopher John

doi:10.1109/tmtt.2014.2299514

Cited by 111 publications

(66 citation statements)

References 33 publications

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“…The design structure of single SSR is shown in Figure 1. Simulated results confirm shift in ƒ r with change in SR radius [12], as dependence of ƒ r on radius has been linked by Equations (2) and (3). It provides optimum radii of the SR to achieve maximum shift in ƒ r .…”

Section: Theorysupporting

confidence: 65%

See 1 more Smart Citation

Simulation Based Comparative Analysis of Resonant Frequency for Tunable Split Ring Resonator in Different Configurations

Haris¹,

Ahmad²,

Naveed³

et al. 2017

Fifth International Conference on Advances in Computing, Electronics and Communication - ACEC 2017

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Abstract-Split ring resonators (SRR) are being researched for material sensing applications recently. These structures are easily fabricated and offer moderate quality factor (Q) and resonant frequencies (ƒ r ). These structures provide limited tunability of ƒ r although considerable variation in Q has been established. A simulation based analysis has been carried out to find most appropriate and practical configuration of SSRs to provide considerable shift in ƒ r . Simulation results show efficacy of vertically stacked SRR vis-à-vis others configurations to achieve tunability.Keywords-split ring resonator, tunability, vertically stacked split rings, complimentary split rings.

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Section: Theorysupporting

confidence: 65%

“…For a single SR based resonator, ƒ r predominantly depends upon the radius of the SR [12]. Design equation were developed by Rowe, David J., et al for ƒ r and Q as a function of SR radius by curve fitting of simulated data where r is the radius of split ring.…”

Section: Theorymentioning

confidence: 99%

Simulation Based Comparative Analysis of Resonant Frequency for Tunable Split Ring Resonator in Different Configurations

Haris¹,

Ahmad²,

Naveed³

et al. 2017

Fifth International Conference on Advances in Computing, Electronics and Communication - ACEC 2017

View full text Add to dashboard Cite

show abstract

“…The dielectric properties of the binary mixtures are then computed theoretically from the dielectric mixture model for the binary composites using the following expression [2]: (5) where the symbols , , and represent the relative permittivity of acetone [29], the binary mixture, and water [28], respectively, and is the volume fraction of the water content in the prepared binary mixture of acetone and water. The theoretical data obtained using the mixture model (5) are also plotted in Fig. 13, which are then used to calculate the error present in the dielectric measurement using the fabricated ENZ sensor.…”

Section: B Measurement Using Single-layer Enz Tunnelmentioning

confidence: 99%

“…The dielectric measurement of liquid solutions at microwave frequencies using microfluidic channels has also been carried out by various research groups [4], [5]. The overall technique of permittivity determination plays quite an important role in the development of microwave sensors, which can be used in the biomedical, petrochemical, and pharmaceutical industry for process monitoring and quality control in real time [8]- [12].…”

Section: Introductionmentioning

confidence: 99%

Design of Multilayered Epsilon-Near-Zero Microwave Planar Sensor for Testing of Dispersive Materials

Jha

Akhtar

2015

IEEE Trans. Microwave Theory Techn.

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A novel planar multilayered epsilon-near-zero (ENZ) tunnel sensor based on fully laminated surface integrated waveguide (SIW) technology is proposed for the microwave measurement of dispersive materials. The proposed sensor is designed and optimized using parametric analysis to obtain the multilayered ENZ tunnel dimensions. It is observed that the width of the upper tunnel of the designed two-tunnel sensor should be at least half of the SIW width of the actual SIW structure for the multiband operation. The complex permittivity measurement using the proposed sensor is possible at two frequencies with a single set of measurement data. The proposed method is based on perturbation of the squeezed electric field having constant magnitude and high intensity inside the multilayered ENZ tunnel, which eventually increases the sensitivity of the proposed sensor. The sensitivity and accuracy of the proposed sensor are tested using both the simulated and the experimented data. It is found that the proposed sensor is highly sensitive, and typically demonstrates 6% error under ideal conditions, thus making it a good candidate for the microwave measurement of dispersive materials.Index Terms-Cavity perturbation methods, dispersive materials, epsilon-near-zero (ENZ), microwave sensors, permittivity measurement, substrate integrated waveguide (SIW). 0018-9480

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“…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]. For these commercial applications to be realized, it is important to accurately and quickly correct the electrical measurements of microwave-microfluidic devices for the attenuation and phase shift of the measurement leads and the standing waves between the fluid-under-test and the vector network analyzer (VNA) [7]- [11].…”

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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Improved Split-Ring Resonator for Microfluidic Sensing

Cited by 111 publications

References 33 publications

Simulation Based Comparative Analysis of Resonant Frequency for Tunable Split Ring Resonator in Different Configurations

Simulation Based Comparative Analysis of Resonant Frequency for Tunable Split Ring Resonator in Different Configurations

Design of Multilayered Epsilon-Near-Zero Microwave Planar Sensor for Testing of Dispersive Materials

A Multistate Single-Connection Calibration for Microwave Microfluidics

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