A novel relative humidity sensor based on microwave resonators and a customized polymeric film

Kim, Yong-Ho; Jang, Kihun; Yoon, Young Joong; Kim, Yong-Jun

doi:10.1016/j.snb.2005.11.004

Cited by 35 publications

(11 citation statements)

References 9 publications

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“…The resonant frequency, quality factor and signal amplitude of the device are exploited to derive both the real (ε ) and imaginary (ε ) parts of the relative complex dielectric permittivity. Development of specific planar microwave resonators was reported in the literature for the determination of the relative humidity in air [17][18][19][20][21][22][23] or water content in concrete and organic coatings [24][25][26][27]. The present work aims to develop a planar antenna, which acts as a microwave resonator for the monitoring of water content in sediments.…”

Section: Introductionmentioning

confidence: 99%

Development of a Resonant Microwave Sensor for Sediment Density Characterization

Mansour

Rioual

Lescop

et al. 2020

Sensors

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In this study, a sensor based on the development of a planar antenna immersed in sediments dedicated to water content monitoring in this type of material is proposed and experimentally validated. It is produced by a conventional Printed Circuit Board (PCB) manufacturing process on a double-sided metalized FR4 substrate. The sensitivity of the sensor is ensured by the variation of the real part of the complex dielectric permittivity of sediments with water content at around 1 GHz. As shown, in this frequency range, electrode polarization and Maxwell–Wagner polarization effects become negligible, leading to only a bulk water polarization sensitivity. The sensor operates in the reflection mode by monitoring the variation of the resonant frequency as a function of the sediment density through the S11 reflection measurements. An experimental sensitivity of 820 MHz . g − 1 . cm 3 was achieved. Despite the simplification of data interpretation at the considered frequency, the influence of ionic species such as NaCl in sediments on the real part of the relative complex dielectric permittivity is highlighted. This demonstrates the importance of considering a second parameter such as the S11 level at low frequency or the electrical conductivity to extract the density from the frequency measurements.

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Section: Introductionmentioning

confidence: 99%

Development of a Resonant Microwave Sensor for Sediment Density Characterization

Mansour

Rioual

Lescop

et al. 2020

Sensors

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“…However these sensors have complex manufacture procedure and need extra antennas, which raise the cost. Different hygroscopic materials have been used as the sensitive layer to improve the performance of the sensors, such as polyvinyl-alcohol [3], poly and sodium polysulfonesulfonate [4], cellulose acetate [5], PolyXIO [6], and some customized polyimides [7]. Among all the materials, polyvinyl-alcohol has shown its advantages of good sensitivity, low hysteresis, easily to be filmed, low price, etc [8].…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive chipless wireless relative humidity sensor based on polyvinyl-alcohol film

Zheng

Schüßler

et al. 2014

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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This paper presents a chipless, highly sensitive, low profile, low cost and easily fabricated passive wireless relative humidity (RH) sensor. The sensor consists of a narrow band loop antenna loaded with PVA film coated interdigital capacitor (IDC) at 2.85 GHz. The RH sensor generates an amplitude peak at resonance in the radar cross section (RCS), which changes with different RH. The sensor is interrogated remotely by a reader antenna, and the measurement results show a good sensitivity up to 5.35 MHz/%RH above 50 % RH.

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“…Digital Object Identifier 10.1109/JSEN.2009.2031388 resonator based on a coplanar waveguide (CPW)-to-slotline resonator ring has been reported to form a humidity sensor [4]. The concept of using CPW lines as dielectric sensors has been presented in reference [5].…”

Section: Introductionmentioning

confidence: 99%

A Microwave Dielectric Biosensor Based on Suspended Distributed MEMS Transmission Lines

Uttamchandani

2009

IEEE Sensors J.

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Design and characterization of a miniature microwave dielectric biosensor based on distributed microelectromechanical systems (MEMS) transmission lines (DMTL) is reported in this paper. The biosensor has been realized by bonding the DMTL device with an acrylic fluidic channel. In order to demonstrate the sensing mechanism, the sensor is used to detect the small variation of the concentration of aqueous glucose solutions by measuring the electromagnetic resonant frequency shift of the device. It is observed from the results that the second notch of the reflection coefficient (S 11) varies from 7.66 to 7.93 GHz and the third notch of the reflection coefficient varies from 15.81 to 15.24 GHz when the concentration of the glucose solution ranges from 0 to 347 mg/ml, which indicates that higher order notches have higher sensitivities if looking at the absolute change in frequency.

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A novel relative humidity sensor based on microwave resonators and a customized polymeric film

Cited by 35 publications

References 9 publications

Development of a Resonant Microwave Sensor for Sediment Density Characterization

Development of a Resonant Microwave Sensor for Sediment Density Characterization

Highly sensitive chipless wireless relative humidity sensor based on polyvinyl-alcohol film

A Microwave Dielectric Biosensor Based on Suspended Distributed MEMS Transmission Lines

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