Air-filled substrate integrated cavity resonator for humidity sensing

Ndoye, Majid; Kerroum, Issam; Deslandes, Dominic; Domingue, Frédéric

doi:10.1016/j.snb.2017.06.101

Cited by 34 publications

(10 citation statements)

References 18 publications

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“…Analogously, the dimension of the sensor is also given as a relative size with respect to the wavelength λ0. As indicated in Table 2, the air-filled SIW structure in reference [23] provides the highest sensitivity but it requires a large dimension. In contrast, the QMSIW cavity in reference [24] effectively reduces the size whereas its sensitivity is too low.…”

Section: Fabrication Measurement and Discussionmentioning

confidence: 99%

“…The passive microwave sensor can not only be conveniently applied to RF sensing systems, but also offers the merits of low cost, high design flexibility, and freedom from a power supply. Thus far, a number of passive microwave RH sensing schemes have been reported [14,15,16,17,18,19,20,21,22,23,24,25,26]. One branch of this research concentrates on the synthesis of novel sensing materials and their combinations with diverse microwave components; it is dedicated to improving the sensing performance of sensors (e.g., sensitivity, resolution, etc.).…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, the effective RH sensing ranges of these sensors may also be limited by the sensing materials, which hinders their practical applications to some extent. Therefore, remarkable efforts have been devoted to develop RH sensors using novel, passive microwave structures without sensing materials [22,23,24,25,26].…”

Section: Introductionmentioning

confidence: 99%

“…An SIW cavity available for RH sensing was first presented by Matbouly et al [22]. Thereafter, a modified air-filled SIW cavity was proposed with the aim of improving sensitivity [23]. Through fully replacing the middle substrate of the cavity with moist air, a sensitivity up to 1.21 MHz/%RH (with an operating frequency of 7.63 GHz) was successfully realized.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Compact Double-Folded Substrate Integrated Waveguide Re-Entrant Cavity for Highly Sensitive Humidity Sensing

Wei

Huang

et al. 2019

Sensors

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In this study, an ultra-compact humidity sensor based on a double-folded substrate integrated waveguide (SIW) re-entrant cavity was proposed and analyzed. By folding a circular re-entrant cavity twice along its two orthogonally symmetric planes, the designed structure achieved a remarkable size reduction (up to 85.9%) in comparison with a conventional TM010-mode circular SIW cavity. The operating principle of the humidity sensor is based on the resonant method, in other words, it utilizes the resonant properties of the sensor as signatures to detect the humidity condition of the ambient environment. To this end, a mathematical model quantitatively relating the resonant frequency of the sensor and the relative humidity (RH) level was established according to the cavity perturbation theory. The sensing performance of the sensor was experimentally validated in a RH range of 30%–80% by using a humidity chamber. The measured absolute sensitivity of the sensor was calculated to be 135.6 kHz/%RH, and the corresponding normalized sensitivity was 0.00627%/%RH. It was demonstrated that our proposed sensor not only has the merits of compact size and high sensitivity, but also benefits from a high Q-factor and ease of fabrication and integration. These advantages make it an excellent candidate for humidity sensing applications in various fields such as the agricultural, pharmaceutical, and food industries.

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Section: Fabrication Measurement and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Compact Double-Folded Substrate Integrated Waveguide Re-Entrant Cavity for Highly Sensitive Humidity Sensing

Wei

Huang

et al. 2019

Sensors

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“…However, this wireless transmission mode using external antennas requires excessive volume. Antenna integrated sensor [27][28][29][30][31] is a novel technology with potentials for wireless monitoring of parameters in harsh environments. It miniaturizes the sensor system J o u r n a l P r e -p r o o f by embedding the sensitive element inside the substrate of antenna, and perceives the ambient environment through the resonant frequency change of the antenna.…”

Section: Introductionmentioning

confidence: 99%

A wireless slot-antenna integrated temperature-pressure-humidity sensor loaded with CSRR for harsh-environment applications

Kou

Tan

Wang

et al. 2020

Sensors and Actuators B: Chemical

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Link to publication on Research at Birmingham portal General rightsUnless a licence is specified above, all rights (including copyright and moral rights) in this document are retained by the authors and/or the copyright holders. The express permission of the copyright holder must be obtained for any use of this material other than for purposes permitted by law.• Users may freely distribute the URL that is used to identify this publication.• Users may download and/or print one copy of the publication from the University of Birmingham research portal for the purpose of private study or non-commercial research.• User may use extracts from the document in line with the concept of 'fair dealing' under the Copyright, Designs and Patents Act 1988 (?) • Users may not further distribute the material nor use it for the purposes of commercial gain.Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document.When citing, please reference the published version. Take down policyWhile the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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Empty Substrate‐Integrated Waveguides: A Low‐Cost and Low‐Profile Alternative for High‐Performance Microwave Devices

Belenguer

Esteban

Borja

et al. 2020

Wiley Encyclopedia of Electrical and Electronics Engineering

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The new communication systems demand low‐cost, low‐profile, low‐weight, and high‐performance components (filters, diplexers, power dividers, antennas, etc.). Classical microwave technologies are either high performance but bulky and expensive (rectangular waveguides) or low cost and low profile but with poor performance (planar lines such as microstrip). Recently, an alternative has appeared by implementing a sort of rectangular waveguide embedded in a printed circuit board. It is the substrate‐integrated waveguide. Many attention has been given to this technology, but its performance can be further improved if the dielectric is removed and the fields propagate through air. So, several types of the so‐called empty substrate‐integrated waveguides have recently appeared, providing with very promising solutions for low‐cost and low‐profile devices with performance close to that of the classical rectangular waveguides.This article presents all the advances up to date in the field of empty substrate‐integrated waveguides, comparing all those solutions and assessing their potential for implementing high‐quality and low‐cost microwave devices.

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Air-filled substrate integrated cavity resonator for humidity sensing

Cited by 34 publications

References 18 publications

A Compact Double-Folded Substrate Integrated Waveguide Re-Entrant Cavity for Highly Sensitive Humidity Sensing

A Compact Double-Folded Substrate Integrated Waveguide Re-Entrant Cavity for Highly Sensitive Humidity Sensing

A wireless slot-antenna integrated temperature-pressure-humidity sensor loaded with CSRR for harsh-environment applications

Empty Substrate‐Integrated Waveguides: A Low‐Cost and Low‐Profile Alternative for High‐Performance Microwave Devices

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