A Microwave Microfluidic Sensor Based on a Dual-Mode Resonator for Dual-Sensing Applications

Janković, Nikolina; Radonić, Vasa

doi:10.3390/s17122713

Cited by 51 publications

(33 citation statements)

References 45 publications

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“…Among the dual/multiple detection microwave sensors compared in Table 4 , only those from [ 30 , 33 ] exhibit independent tuning capability. The tuning of the resonance frequencies in our proposed sensor is partially independently-tunable, owing to its inherent nature (two E-field regions tend to control a single resonance).…”

Section: Discussionmentioning

confidence: 99%

“…The tuning of the resonance frequencies in our proposed sensor is partially independently-tunable, owing to its inherent nature (two E-field regions tend to control a single resonance). The sensor proposed in [ 33 ] is comprised of five stacked layers constructed using low-temperature cofired ceramic technology and laser micromachining.…”

Section: Discussionmentioning

confidence: 99%

“…If the same dielectric chemical was loaded in both channels, a frequency shift was not observed. In [ 33 ], a dual-mode resonator was proposed as a dual sensor. In one mode, the resonance-shift principle is based on the capacitive effect, while in the other mode, the properties of a stub (i.e., the change of the characteristic impedance and the electrical length) are used.…”

Section: Introductionmentioning

confidence: 99%

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TM02 Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals

Salim

Lim

2018

Sensors

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The detection of multiple fluids using a single chip has been attracting attention recently. A TM02 quarter-mode substrate-integrated waveguide resonator designed at 5.81 GHz on RT/duroid 6010LM with a return loss of 13 dB and an unloaded quality factor of Q ≈ 13 generates two distinct strong electric fields that can be manipulated to simultaneously detect two chemicals. Two asymmetric channels engraved in a polydimethylsiloxane sheet are loaded with analyte to produce a unique resonance frequency in each case, regardless of the dielectric constants of the liquids. Keeping in view the nature of lossy liquids such as ethanol, the initial structure and channels are optimized to ensure a reasonable return loss even in the case of loading lossy liquids. After loading the empty channels, Q is evaluated as 43. Ethanol (E) and deionized water (DI) are simultaneously loaded to demonstrate the detection of all possible combinations: [Air, Air], [E, DI], [DI, E], [E, E], and [DI, DI]. The proposed structure is miniaturized while exhibiting a performance comparable to that of existing multichannel microwave chemical sensors.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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TM02 Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals

Salim

Lim

2018

Sensors

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“…The bottom and top layers have the same known dielectric contestants, while the middle one is with an unknown material and with known geometrical parameters. This geometrical configuration is typical for the realization of the sensor for the characterization of a fluid or gasses in which the reservoir is placed between two dielectrics bellow microstrip line [25,26].…”

Section: Multilayered Substrate Configurationsmentioning

confidence: 99%

Phase-Shift Transmission Line Method for Permittivity Measurement and Its Potential in Sensor Applications

Radonić¹,

Cselyuszka²,

Crnojević‐Bengin³

et al. 2020

Electromagnetic Materials and Devices

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This chapter offers a detailed insight into a dielectric characterization of the materials based on the phase-shift measurements of the transmission signal. The chapter will provide in-depth theoretical background of the phase-shift transmission line measurement in the microstrip architecture and determination of dielectric permittivity of design under test for several measurement configurations. Potential of the phase-shift method will be demonstrated through applications in the characterization of an unknown dielectric constant in multilayered structure, realization of the soil moisture sensor, and sensor for determination of the dielectric constant of a fluid in microfluidic channel. Moreover, specific techniques for increasing the phase shift based on the electromagnetic bandgap structure, the aperture in the ground plane and the left-handed effect will be presented. In the end, the realization of simple in-field detection device for determination of permittivity based on the phase-shift measurement will be demonstrated.

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“…Another interesting application for non-contact liquid sensing using capacitive coupled planar ring resonators was presented in [ 5 ]. In literature, a microstrip microfluidic sensor has been reported [ 6 ]. Microstrip transducers have also been used in gas sensing [ 7 , 8 ], pressure monitoring [ 9 ] and temperature evaluation [ 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

A Circular Microstrip Antenna Sensor for Direction Sensitive Strain Evaluation

Łopato

Herbko

2018

Sensors

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In this paper, a circular microstrip antenna for stress evaluation is studied. This kind of microstrip sensor can be utilized in structural health monitoring systems. Reflection coefficient S11 is measured to determine deformation/strain value. The proposed sensor is adhesively connected to the studied sample. Applied strain causes a change in patch geometry and influences current distribution both in patch and ground plane. Changing the current flow in patch influences the value of resonant frequency. In this paper, two different resonant frequencies were analysed because in each case, different current distributions in patch were obtained. The sensor was designed for operating frequency of 2.5 GHz (at fundamental mode), which results in a diameter less than 55 mm. Obtained sensitivity was up to 1 MHz/100 MPa, resolution depends on utilized vector network analyser. Moreover, the directional characteristics for both resonant frequencies were defined, studied using numerical model and verified by measurements. Thus far, microstrip antennas have been used in deformation measurement only if the direction of external force was well known. Obtained directional characteristics of the sensor allow the determination of direction and value of stress by one sensor. This method of measurement can be an alternative to the rosette strain gauge.

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A Microwave Microfluidic Sensor Based on a Dual-Mode Resonator for Dual-Sensing Applications

Cited by 51 publications

References 45 publications

TM02 Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals

TM02 Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals

Phase-Shift Transmission Line Method for Permittivity Measurement and Its Potential in Sensor Applications

A Circular Microstrip Antenna Sensor for Direction Sensitive Strain Evaluation

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