scholarly journals Zirconia-Based Ultra-Thin Compact Flexible CPW-Fed Slot Antenna for IoT

Sensors ◽  
2019 ◽  
Vol 19 (14) ◽  
pp. 3134 ◽  
Author(s):  
María Elena de Cos Gómez ◽  
Humberto Fernández Álvarez ◽  
Blas Puerto Valcarce ◽  
Cebrián García González ◽  
John Olenick ◽  
...  
Keyword(s):  
Impedance Matching ◽  
Slot Antenna ◽  
The Novel ◽  
Frequency Range ◽  
Dielectric Substrates ◽  
Iot Applications ◽  
Radiation Properties ◽  
Novel Material ◽  
The Internet Of Things

An ultra-thin compact flexible CPW-fed slot monopole antenna suitable for the Internet of Things (IoT) applications was achieved as a result of exploring the use of Zirconia-based ENrG’s Thin E-Strate® for the antenna’s design. The electromagnetic characterization of the novel material at the frequency range of interest was analyzed. A comparison was made concerning the required dimensions and the simulation results regarding impedance matching and radiation properties, for three different dielectric substrates: Novel flexible ceramic (ENrG’s Thin E-Strate), rigid Arlon 25N, and flexible Polypropylene (PP). Two different metallization techniques—electrotextile-based and inkjet printing—were used in the fabrication of prototypes based on ENrG’s Thin E-Strate. Return losses measured results for the fabricated prototypes with both procedures was compared, as well as with simulation. The best prototype on the ENrG’s Thin E-Strate was compared with one on Arlon 25N, in terms of radiation properties in an anechoic chamber, and conclusions were drawn.

scholarly journals Luminescent properties of europium titanium phosphate thin films deposited by atomic layer deposition

RSC Advances ◽  
2017 ◽  
Vol 7 (13) ◽  
pp. 8051-8059 ◽  
Author(s):  
Michael N. Getz ◽  
Per-Anders Hansen ◽  
Helmer Fjellvåg ◽  
Ola Nilsen
Keyword(s):  
Thin Films ◽  
Atomic Layer Deposition ◽  
Structural Characterization ◽  
Atomic Layer ◽  
Luminescent Properties ◽  
Titanium Phosphate ◽  
The Novel ◽  
Layer Deposition ◽  
Novel Material

Optical and structural characterization of luminescent thin films of the novel material europium titanium phosphate, deposited by atomic layer deposition.

CPW-Fed Circularly Polarized Slot Antenna

2017 ◽  
Vol 7 (10) ◽  
pp. 70
Author(s):  
Ajit Chandramohan Yadav ◽  
Shafiyoddin Badroddin Sayyad
Keyword(s):  
Frequency Band ◽  
Microstrip Antenna ◽  
Dielectric Material ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Dual Band ◽  
Slot Antenna ◽  
Frequency Range ◽  
Band Frequency ◽  
Circularly Polarized

This article demonstrates the coplanar waveguide (CPW) feed L- slot microstrip antenna for multi frequency band operation is presented. The proposed antenna is excited by a single CPW feed connected to a Microstrip antenna. In this radiating patch and feed are etched on the same dielectric material. A SMA connector is used to connect the feed strip which couples the energy to a radiating patch by capacitive feed. The length and width are designed to obtained dual band frequency range. A truncation is used for multiband operations and for proper impedance matching. L- slot is used to increase the depth of S11 parameter. 

scholarly journals Electromagnetic characterization of microwave sintered Sr1-xCaxMnO3 (0.0 ≤ x ≤ 0.4) thick films

2013 ◽  
Vol 7 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Rani Pawar ◽  
Ninad Velhal ◽  
Vijaya Puri
Keyword(s):  
Impedance Matching ◽  
Calcium Content ◽  
Frequency Range ◽  
Absorption Loss ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Band ◽  
Electromagnetic Characteristics ◽  
Ku Band

Electromagnetic characteristics of microwave sintered strontium calcium manganites thick film with variation in calcium content have been investigated. The X-ray diffraction analysis reveals tetragonal perovskite structure for all the compositions. The grain size increases with the increase in calcium content. The microwave absorption, complex permittivity, permeability and conductivity are reported in the frequency range of 8.2-18 GHz. The absorption loss is larger in Ku band while insertion loss is larger in X band. The permittivity, permeability and microwave conductivity decreases from X-band to Ku-band. The almost identical values of real part of permittivity and permeability indicate possible application as materials for impedance matching.

scholarly journals A Textile EBG-Based Antenna for Future 5G-IoT Millimeter-Wave Applications

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 154
Author(s):  
EL May Wissem ◽  
Imen Sfar ◽  
Lotfi Osman ◽  
Jean-Marc Ribero
Keyword(s):  
Cellular Networks ◽  
Millimeter Wave ◽  
Specific Absorption Rate ◽  
Impedance Matching ◽  
Polyester Fabric ◽  
Electromagnetic Bandgap ◽  
Iot Applications ◽  
Textile Antenna ◽  
Textile Fabric

A millimeter-wave (mmWave) textile antenna operating at 26 GHz band for 5G cellular networks is proposed in this paper. The electromagnetic characterization of the textile fabric used as substrate at the operating frequency was measured. The textile antenna was integrated with an electromagnetic bandgap (EBG) structure and placed on a polyester fabric substrate around the antenna. Results showed that the proposed EBG significantly improved the performance of the antenna. The gain and energy efficiency at 26 GHz were 8.65 dBi and 61%, respectively (an increase of 2.52 dB and 7% compared to a conventional antenna), and the specific absorption rate (SAR) was reduced by more than 69.9%. Good impedance matching of the fabricated antenna at the desired frequency was observed when it was bent and worn on the human body. The structure is simple, compact, and easy to manufacture. It may well be suitable for integration into applied clothing in various fields, especially for future IoT applications.

Theoretical Ecology

2007 ◽  
Keyword(s):  
Spatial Dynamics ◽  
Theory And Practice ◽  
The Novel ◽  
Basic Principles ◽  
Theoretical Ecology ◽  
Global Environmental Problems ◽  
Global Environmental ◽  
Interacting Populations ◽  
Novel Material ◽  
Ecological Science

Robert May's seminal book has played a central role in the development of ecological science. Originally published in 1976, this influential text has overseen the transition of ecology from an observational and descriptive subject to one with a solid conceptual core. Indeed, it is a testament to its influence that a great deal of the novel material presented in the earlier editions has now been incorporated into standard undergraduate textbooks. It is now a quarter of a century since the publication of the second edition, and a thorough revision is timely. Theoretical Ecology provides a succinct, up-to-date overview of the field set in the context of applications, thereby bridging the traditional division of theory and practice. It describes the recent advances in our understanding of how interacting populations of plants and animals change over time and space, in response to natural or human-created disturbance. In an integrated way, initial chapters give an account of the basic principles governing the structure, function, and temporal and spatial dynamics of populations and communities of plants and animals. Later chapters outline applications of these ideas to practical issues including fisheries, infectious diseases, tomorrow's food supplies, climate change, and conservation biology. Throughout the book, emphasis is placed on questions which as yet remain unanswered. The editors have invited the top scientists in the field to collaborate with the next generation of theoretical ecologists. The result is an accessible, advanced textbook suitable for senior undergraduate and graduate level students as well as researchers in the fields of ecology, mathematical biology, environmental and resources management. It will also be of interest to the general reader seeking a better understanding of a range of global environmental problems.

scholarly journals Attack Categorisation for IoT Applications in Critical Infrastructures, a Survey

2021 ◽  
Vol 11 (16) ◽  
pp. 7228
Author(s):  
Edward Staddon ◽  
Valeria Loscri ◽  
Nathalie Mitton
Keyword(s):  
Critical Infrastructure ◽  
Attack Detection ◽  
Critical Infrastructures ◽  
Cyber Attack ◽  
Specific System ◽  
Iot Applications ◽  
War Zone ◽  
Clear Vision ◽  
The Internet Of Things ◽  
Do So

With the ever advancing expansion of the Internet of Things (IoT) into our everyday lives, the number of attack possibilities increases. Furthermore, with the incorporation of the IoT into Critical Infrastructure (CI) hardware and applications, the protection of not only the systems but the citizens themselves has become paramount. To do so, specialists must be able to gain a foothold in the ongoing cyber attack war-zone. By organising the various attacks against their systems, these specialists can not only gain a quick overview of what they might expect but also gain knowledge into the specifications of the attacks based on the categorisation method used. This paper presents a glimpse into the area of IoT Critical Infrastructure security as well as an overview and analysis of attack categorisation methodologies in the context of wireless IoT-based Critical Infrastructure applications. We believe this can be a guide to aid further researchers in their choice of adapted categorisation approaches. Indeed, adapting appropriated categorisation leads to a quicker attack detection, identification, and recovery. It is, thus, paramount to have a clear vision of the threat landscapes of a specific system.

Characterization of the novel HLA‐C *07:944 allele by next‐generation sequencing

HLA ◽  
2021 ◽  
Author(s):  
Maria Loginova ◽  
Olga Makhova ◽  
Daria Smirnova ◽  
Igor Paramonov ◽  
Maksim Zarubin
Keyword(s):  
Next Generation Sequencing ◽  
The Novel ◽  
Next Generation ◽  
Generation Sequencing

Characterization of the novel HLA‐B *51:296 allele by next‐generation sequencing

HLA ◽  
2020 ◽  
Author(s):  
Steve Genebrier ◽  
Vincent Elsermans ◽  
Emeric Texeraud ◽  
Gerald Bertrand ◽  
Virginie Renac
Keyword(s):  
Next Generation Sequencing ◽  
The Novel ◽  
Next Generation ◽  
Generation Sequencing

scholarly journals IoT Traffic: Modeling and Measurement Experiments

IoT ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 140-162
Author(s):  
Hung Nguyen-An ◽  
Thomas Silverston ◽  
Taku Yamazaki ◽  
Takumi Miyoshi
Keyword(s):  
Smart Home ◽  
Large Scale ◽  
Traffic Modeling ◽  
The Novel ◽  
Network Behavior ◽  
Performance Accuracy ◽  
Traffic Generator ◽  
Multiple Devices ◽  
Iot Devices ◽  
The Internet Of Things

We now use the Internet of things (IoT) in our everyday lives. The novel IoT devices collect cyber–physical data and provide information on the environment. Hence, IoT traffic will count for a major part of Internet traffic; however, its impact on the network is still widely unknown. IoT devices are prone to cyberattacks because of constrained resources or misconfigurations. It is essential to characterize IoT traffic and identify each device to monitor the IoT network and discriminate among legitimate and anomalous IoT traffic. In this study, we deployed a smart-home testbed comprising several IoT devices to study IoT traffic. We performed extensive measurement experiments using a novel IoT traffic generator tool called IoTTGen. This tool can generate traffic from multiple devices, emulating large-scale scenarios with different devices under different network conditions. We analyzed the IoT traffic properties by computing the entropy value of traffic parameters and visually observing the traffic on behavior shape graphs. We propose a new method for identifying traffic entropy-based devices, computing the entropy values of traffic features. The method relies on machine learning to classify the traffic. The proposed method succeeded in identifying devices with a performance accuracy up to 94% and is robust with unpredictable network behavior with traffic anomalies spreading in the network.

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