A novel EM barcode for humidity sensing

Amin, Emran Md; Bhuiyan, Shakil; Karmakar, Nemai Chandra; Winther‐Jensen, Bjorn

doi:10.1109/rfid.2013.6548139

Cited by 25 publications

(10 citation statements)

References 18 publications

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“…In [14], the authors designed a conductive-ink-based passive humidity sensor printed on a flexible Kapton film and used a focused millimeter-wave wireless transceiver to enable a long transmission range. In [15], the authors designed a chipless RFID tag to sense humidity, which is composed of a patch with slot resonators and an electric inductive-capacitive resonator. In [16], the authors also proposed a chipless RFID sensor tag for humidity monitoring, which is composed of slotted scatterer structures fabricated on the substrate of a printed circuit board.…”

Section: A Chipless Passive Sensorsmentioning

confidence: 99%

Meta-Material Sensor Based Internet of Things: Design, Optimization, and Implementation

Hu¹,

Zhang²,

Di³

et al. 2022

IEEE Trans. Commun.

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For many applications envisioned for the Internet of Things (IoT), it is expected that the sensors will have very low costs and zero power, which can be satisfied by meta-material sensor based IoT, i.e., meta-IoT. As their constituent meta-materials can reflect wireless signals with environment-sensitive reflection coefficients, meta-IoT sensors can achieve simultaneous sensing and transmission without any active modulation. However, to maximize the sensing accuracy, the structures of meta-IoT sensors need to be optimized considering their joint influence on sensing and transmission, which is challenging due to the high computational complexity in evaluating the influence, especially given a large number of sensors. In this paper, we propose a joint sensing and transmission design method for meta-IoT systems with a large number of meta-IoT sensors, which can efficiently optimize the sensing accuracy of the system. Specifically, a computationally efficient received signal model is established to evaluate the joint influence of meta-material structure on sensing and transmission. Then, a sensing algorithm based on deep unsupervised learning is designed to obtain accurate sensing results in a robust manner.Experiments with a prototype verify that the system has a higher sensitivity and a longer transmission range compared to existing designs, and can sense environmental anomalies correctly within 2 meters.

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Section: A Chipless Passive Sensorsmentioning

confidence: 99%

Meta-Material Sensor Based Internet of Things: Design, Optimization, and Implementation

Hu¹,

Zhang²,

Di³

et al. 2022

IEEE Trans. Commun.

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“…This polymer has been used for capacitive-based humidity sensing by Chen and Kao [135] and by Amin et al in References [196,197]. Polyvinyl Alcohol (PVA) is a hydrophilic polymer that is less sensitive to humidity than other polymers, such as polymethyl methacrylate (PMMA) or poly (2-hydroxyethyl methacrylate) (PHEMA) [198], but more sensitive than Kapton [196].…”

Section: Overview Of Previously Used Rfid Sensor Materialsmentioning

confidence: 99%

“…Although the conductivity of PVA increases due to water sorption [199], this polymer can be used as a capacitive-type sensing film for UHF and microwave sensor systems, as seen in Reference [200] by Amin et al and Reference [127] by Amin et al As with many of the polymers discussed in this section, PVA can be used as a standalone, sensitive coating, as seen in References [196,197] by Amin et al, along with the work of Chen and Kao [135]. Alternatively, PVA can be used as part of a composite sensing material, as seen in the work of Chatzandroulis et al [198], along with the work of Andreev et al [199] and Deshkulkarni et al [201].…”

Section: Overview Of Previously Used Rfid Sensor Materialsmentioning

confidence: 99%

A Review of Chipless Remote Sensing Solutions Based on RFID Technology

Gee

Anandarajah

Collins

2019

Sensors

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Chipless Radio Frequency Identification (RFID) has been used in a variety of remote sensing applications and is currently a hot research topic. To date, there have been a large number of chipless RFID tags developed in both academia and in industry that boast a large variation in design characteristics. This review paper sets out to discuss the various design aspects needed in a chipless RFID sensor. Such aspects include: (1) Addressing strategies to allow for unique identification of the tag, (2) Sensing mechanisms used to allow for impedance-based response signal modulation and (3) Sensing materials to introduce the desired impedance change when under the influence of the target stimulus. From the tabular comparison of the various sensing and addressing techniques, it is concluded that although many sensors provide adequate performance characteristics, more work is needed to ensure that this technology is capable/robust enough to operate in many of the applications it has been earmarked for.

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“…While successes are achieved in very low-cost multibit chipless tag design, there are pressing needs to extend the functionality for real-time wireless sensing and monitoring of physical parameters such as temperature, relative humidity, pressure or impact, moisture content, sensing of noxious gases, light intensity, and location of objects [13][14][15][16]. In these pursuits, various sensing materials that are compatible with the printable RF/microwave electronics are also investigated.…”

Section: Why Incorporation Of Sensing Elements In Chipless Rfid Tags-...mentioning

confidence: 99%

Chipless RFID Sensors

Karmakar

Amin

Saha

2016

Self Cite

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A novel EM barcode for humidity sensing

Cited by 25 publications

References 18 publications

Meta-Material Sensor Based Internet of Things: Design, Optimization, and Implementation

Meta-Material Sensor Based Internet of Things: Design, Optimization, and Implementation

A Review of Chipless Remote Sensing Solutions Based on RFID Technology

Chipless RFID Sensors

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