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Innovative Techniques for 60-GHz On-Chip Antennas on CMOS Substrate [chapter]

Adel Barakat, Ramesh Pokharel, Hala Elsadek
<span title="2017-01-11">2017</span> <i title="InTech"> Microwave Systems and Applications </i> &nbsp;
The 60-GHz band has a 7-GHz of bandwidth enabling high data rate wireless communication. Also, it has a short wavelength allowing for passive devices integration into a chip, that is, fully integrated system-on-chip (SOC) is possible. This chapter features the design, implementation, and measurements of 60-GHz on-chip antennas (OCAs) on complementary-metal-oxide-semiconductor (CMOS) technology. OCAs are the primary barrier for the SOC solution due to their limited performance. This degraded
more &raquo; ... ormance comes from the low resistivity and the high permittivity of the CMOS substrate. We present here two innovative techniques to improve the CMOS OCAs' performance. The first method utilizes artificial magnetic conductors to shield the OCA electromagnetically from the CMOS substrate. The second methodology employs the PN-junction properties to create a high resistivity layer. Both approaches target the mitigation of the losses of the CMOS substrate; hence, the radiation performance characteristics of the OCAs are enhanced.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.5772/66238">doi:10.5772/66238</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/ry5dpttzejccvmrmpz3tiyqxom">fatcat:ry5dpttzejccvmrmpz3tiyqxom</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20190502010321/https://cdn.intechopen.com/pdfs/52946.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/5a/fb/5afb8efdb08ad96a5911840e272dc0a635628aa3.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.5772/66238"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

Microstrip Antennas for Mobile Wireless Communication Systems [chapter]

Hala Elsadek
<span title="2010-01-01">2010</span> <i title="InTech"> Mobile and Wireless Communications Network Layer and Circuit Level Design </i> &nbsp;
Elsadek (2010).  ...  KETQUVTKR #PVGPPCU HQT /QDKNG 9KTGNGUU %QOOWPKECVKQP 5[UVGOU )HDWXUH %HQHILW 6LJQDO JDLQ ,ISBN 978-953-307-042-1 Hard cover, 404 pages Publisher InTech Published online 01, January, 2010 Hala  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.5772/7705">doi:10.5772/7705</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/nsak6kdy2rbojh3a3qxq3u6pvm">fatcat:nsak6kdy2rbojh3a3qxq3u6pvm</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20180727053502/https://api.intechopen.com/chapter/pdf-download/8994" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/20/b9/20b99cc55071ae7007c63c461949e0e320180ab4.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.5772/7705"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

Rectenna Systems for RF Energy Harvesting and Wireless Power Transfer [chapter]

Mohamed Aboualalaa, Hala Elsadek
<span title="2019-10-29">2019</span> <i title="IntechOpen"> Wireless Energy Transfer Technology [Working Title] </i> &nbsp;
With the rapid development of the wireless systems and demands of low-power integrated electronic circuits, various research trends have tended to study the feasibility of powering these circuits by harvesting free energy from ambient electromagnetic space or by using dedicated RF source. Wireless power transmission (WPT) technology was first pursued by Tesla over a century ago. However, it faced several challenges for deployment in real applications. Recently, energy harvesting and WPT
more &raquo; ... gies have received much attention as a clean and renewable power source. Rectenna (rectifying antenna) system can be used for remotely charging batteries in several sensor networks at internet of things (IoT) applications as commonly used in smart buildings, implanted medical devices and automotive applications. Rectenna, which is used to convert from RF energy to usable DC electrical energy, is mainly a combination between a receiving antenna and a rectifier circuit. This chapter will present several designs for single and multiband rectennas with different characteristics for energy harvesting applications. Single and multiband antennas as well as rectifier circuits with matching networks are introduced for complete successful rectenna circuit models. At the end of the chapter, a dual-band rectenna example is introduced with a detailed description for each section of the rectenna.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.5772/intechopen.89674">doi:10.5772/intechopen.89674</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/eg6iyxtuxvd2nom4xn6o7bbzyi">fatcat:eg6iyxtuxvd2nom4xn6o7bbzyi</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200310150757/https://api.intechopen.com/chapter/pdf-download/69576.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/ea/88/ea8846386b3a317190497925a8ed022f530e7b2f.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.5772/intechopen.89674"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> Publisher / doi.org </button> </a>

Type 2 diabetes in Sudanese children and adolescents

Hala A M Osman, Nadia Elsadek, Mohamed A Abdullah
<span title="">2013</span> <i title="Discover Publishing Group"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/lgkn67nrynemzfiss2mwhfndfu" style="color: black;">Sudanese Journal of Paediatrics</a> </i> &nbsp;
Original Article Type 2 diabetes in Sudanese children and adolescents Hala A M Osman (1), Nadia Elsadek (2), Mohamed A.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pubmed/27493369">pmid:27493369</a> <a target="_blank" rel="external noopener" href="https://pubmed.ncbi.nlm.nih.gov/PMC4949936/">pmcid:PMC4949936</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/hklhfdu2eraurouitctjx5xixu">fatcat:hklhfdu2eraurouitctjx5xixu</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20191030134847/http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC4949936&amp;blobtype=pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/58/5a/585a37bb90b543e2431b1a37dfe3088589ecc8ea.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4949936" title="pubmed link"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> pubmed.gov </button> </a>

Switched Beam Antenna System for V2V Communication in 5G Applications

Allam M. Ameen, Mohamed I. Ahmed, Hala Elsadek, Wagdy R. Anis
<span title="2021-12-30">2021</span> <i title="River Publishers"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/6ap3nelzqbhdbhpyftx2mdvldm" style="color: black;">Applied Computational Electromagnetics Society journal</a> </i> &nbsp;
In this paper, a switched beam antenna system consists of four Vivaldi antennas for vehicle-to-vehicle communication is presented. The proposed design is realized on a substrate material of "Rogers 5880" with εr=2.2,tanδ=0.002,andεr=2.2,tan⁢δ=0.002,and0.508-mm substrate thickness. The antenna is designed to operate at a center frequency of 28 GHz with operating bandwidth of 1.463 GHz. An overall realized gain of 9.78 dBi is achieved at the intended center frequency. The proposed antenna is
more &raquo; ... ned and simulated using CSTMWS. It is also fabricated using photolithography techniques and measured using R&S vector network analyzer. Good agreement is obtained between both CSTMWS and measured results.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.13052/2021.aces.j.361107">doi:10.13052/2021.aces.j.361107</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/quvtb2tmcjbebd2kptq67whwn4">fatcat:quvtb2tmcjbebd2kptq67whwn4</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20220323142949/https://journals.riverpublishers.com/index.php/ACES/article/download/12209/10377" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/b7/4d/b74d54a3abe8daeda550f0ab553f7c59206e1900.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.13052/2021.aces.j.361107"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

WPT, Recent Techniques for Improving System Efficiency [chapter]

Mohamed Aboualalaa, Hala Elsadek, Ramesh K. Pokharel
<span title="2021-03-02">2021</span> <i title="IntechOpen"> Wireless Power Transfer – Recent Development, Applications and New Perspectives [Working Title] </i> &nbsp;
Wireless power transfer (WPT) technologies have received much more attention during the last decade due to their effectiveness in wireless charging for a wide range of electronic devices. To transmit power between two points without a physical link, conventional WPT systems use two coils, one coil is a transmitter (Tx) and the other is a receiver (Rx) which generates an induced current from the received power. Two main factors control the performance of the WPT schemes, power transfer
more &raquo; ... (PTE) and transmission range. Power transfer efficiency refers to how much power received by the rechargeable device compared to the power transmitted from the transmitter; while transmission range indicates the longest distance between transmitter and receiver at which the receiver can receive power within the acceptable range of power transfer efficiency. Several studies were carried out to improve these two parameters. Many techniques are used for WPT such as inductive coupling, magnetic resonance coupling, and strongly coupled systems. Recently, metamaterial structures are also proposed for further transfer efficiency enhancement. Metamaterials work as an electromagnetic lensing structure that focuses the evanescent transmitted power into receiver direction. Transmitting & Receiving antenna systems may be used for sending power in certain radiation direction. Optimizing the transmitter antenna and receiver antenna characteristics increase the efficiency for WPT systems. This chapter will present a survey on different wireless power transmission schemes.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.5772/intechopen.96003">doi:10.5772/intechopen.96003</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/mv7dnlntxfgedm5tsrcvhf274e">fatcat:mv7dnlntxfgedm5tsrcvhf274e</a> </span>
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Improved gain 60 GHz CMOS antenna with N-well grid

Adel Barakat, Ahmed Allam, Hala Elsadek, Adel B. Abdel-Rahman, Ramesh K. Pokharel, Takana Kaho
<span title="">2016</span> <i title="Institute of Electronics, Information and Communications Engineers (IEICE)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/fvf4s3u4inbjpnfv6imirwcvam" style="color: black;">IEICE Electronics Express</a> </i> &nbsp;
This paper presents a novel technique to enhance Antenna-on-Chip gain by introducing a high resistivity layer below it. Instead of using the costly ion implantation method to increase resistivity, the N-well that is available in the standard CMOS process is used. A distributed grid structure of N-well on P-type substrate is designed such that the P and N semiconductors types are fully depleted forming a layer with high resistivity. By an electromagnetic simulation, the using depletion layers
more &raquo; ... ance the antenna gain and radiation efficiency without increasing the occupied area. The simulated and measured |S11| are in fair agreement. The measured gain is −1.5 dBi at 66 GHz.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1587/elex.13.20151115">doi:10.1587/elex.13.20151115</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/bqn7leplorgxhhxb4feen3jir4">fatcat:bqn7leplorgxhhxb4feen3jir4</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20180730065016/https://www.jstage.jst.go.jp/article/elex/13/5/13_13.20151115/_pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/c7/fa/c7fa466a8838274dc6fc880a81a0eab0360bfb20.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1587/elex.13.20151115"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

Microstrip Antennas: Future Trends and New Applications

Hala A. Elsadek, Esmat A. Abdallah, Dalia M. Elsheakh, Heba Badr El-Din El-Shaarawy
<span title="">2013</span> <i title="Hindawi Limited"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/ji6abxztvrhtnj5erbdtfedyca" style="color: black;">International Journal of Antennas and Propagation</a> </i> &nbsp;
Hala A. Elsadek Esmat A. Abdallah Dalia M. Elsheakh Heba Badr El-Din El-Shaarawy  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1155/2013/890764">doi:10.1155/2013/890764</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/rvehq73oz5badoppsuynmhp27i">fatcat:rvehq73oz5badoppsuynmhp27i</a> </span>
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Design of dual-band implanted patch antenna system for bio-medical applications

Ahmed Z. A. Zaki, Tamer Gaber Abouelnaga, Ehab K. I. Hamad, Hala A. Elsadek
<span title="2021-08-01">2021</span> <i title="Walter de Gruyter GmbH"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/k3w7rbtfrrge7bwj7qlgcavjlq" style="color: black;">Journal of Electrical Engineering</a> </i> &nbsp;
In this paper, a miniaturized implantable antenna system for biomedical applications is presented. The system consists of almost two similar patch antennas, named internal and external. The internal antenna is implanted inside the body at a depth of 2 mm, and the external antenna is to be attached to the body aligned with the internal one. The antenna system consists of implant-side antenna with dimensions are 10.25×10.25×1.27 mm3 , while the external antenna dimensions are 11.1×11.1×1.27 mm3.
more &raquo; ... he proposed antennas designs showed dual resonant frequency on ISM bands (ie , 915 MHz and 2450 MHz ). The computed -10 dB bandwidth considering three-layer human phantom demonstrates that a bandwidth of 870 to 970 MHz and 2.38 to 2.47 GHz for internal and external antennas are achieved. The Specific Absorption Rate (SAR) has been considered for health care consideration. The measured and simulated scattering parameters are compared, and good agreements are achieved. The proposed antenna system is simulated and investigated for biomedical applications suitability.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.2478/jee-2021-0033">doi:10.2478/jee-2021-0033</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/ei3zbqca7vgbhmjfrzmulnpaye">fatcat:ei3zbqca7vgbhmjfrzmulnpaye</a> </span>
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Rapid Detection of Coronavirus (COVID-19) Using Microwave Immunosensor Cavity Resonator

Dalia M. Elsheakh, Mohamed I. Ahmed, Gomaa M. Elashry, Saad M. Moghannem, Hala A. Elsadek, Waleed N. Elmazny, Nelly H. Alieldin, Esmat A. Abdallah
<span title="2021-10-23">2021</span> <i title="MDPI AG"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/taedaf6aozg7vitz5dpgkojane" style="color: black;">Sensors</a> </i> &nbsp;
This paper presents a rapid diagnostic device for the detection of the pandemic coronavirus (COVID-19) using a micro-immunosensor cavity resonator. Coronavirus has been declared an international public health crisis, so it is important to design quick diagnostic methods for the detection of infected cases, especially in rural areas, to limit the spread of the virus. Herein, a proof-of-concept is presented for a portable laboratory device for the detection of the SARS-CoV-2 virus using
more &raquo; ... netic biosensors. This device is a microwave cavity resonator (MCR) composed of a sensor operating at industrial, scientific and medical (ISM) 2.45 GHz inserted in 3D housing. The changes of electrical properties of measured serum samples after passing the sensor surface are presented. The three change parameters of the sensor are resonating frequency value, amplitude and phase of the reflection coefficient |S11|. This immune-sensor offers a portable, rapid and accurate diagnostic method for the SARS-CoV-2 virus, which can enable on-site diagnosis of infection. Medical validation for the device is performed through biostatistical analysis using the ROC (Receiver Operating Characteristic) method. The predictive accuracy of the device is 63.3% and 60.6% for reflection and phase, respectively. The device has advantages of low cost, low size and weight and rapid response. It does need a trained technician to operate it since a software program operates automatically. The device can be used at ports' quarantine units, hospitals, etc.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.3390/s21217021">doi:10.3390/s21217021</a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pubmed/34770328">pmid:34770328</a> <a target="_blank" rel="external noopener" href="https://pubmed.ncbi.nlm.nih.gov/PMC8588152/">pmcid:PMC8588152</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/qbg4ogfmyjh7tj5frqbl4ilnsq">fatcat:qbg4ogfmyjh7tj5frqbl4ilnsq</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20211023104029/https://mdpi-res.com/d_attachment/sensors/sensors-21-07021/article_deploy/sensors-21-07021.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/16/52/16526d5ae3831c44165ce7365243c7c3d51342a0.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.3390/s21217021"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> mdpi.com </button> </a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8588152" title="pubmed link"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> pubmed.gov </button> </a>

Microwave holographic 3-D rendering system using a reduced-size planar array antenna

Hala Elsadek, Hesham Eldeeb, Franco De-Flaviis, Luis Jofre, Esmat Abdallah, Essam Hashish
<span title="">2001</span> <i title="Wiley"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/e4432kfn7vhifc3aru3e7hyw5i" style="color: black;">Microwave and optical technology letters (Print)</a> </i> &nbsp;
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1002/mop.1189">doi:10.1002/mop.1189</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/lxgmrekxkng53d6mhkt2dxoade">fatcat:lxgmrekxkng53d6mhkt2dxoade</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200321084123/http://newport.eecs.uci.edu/rfmems/publications/papers/others/J015-MOT91.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/70/6b/706b691cf8b3cc3bdbca2d9eb348edd45e6012f3.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1002/mop.1189"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> wiley.com </button> </a>

RECONFIGURABLE SINGLE AND MULTIBAND INSET FEED MICROSTRIP PATCH ANTENNA FOR WIRELESS COMMUNICATION DEVICES

Dalia Mohammed Nashaat Elsheakh, Hala A. Elsadek, Esmat Abdel-Fattah Abdallah, Magdy F. Iskander, Hadia S. El-Henawy
<span title="">2010</span> <i title="EMW Publishing"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/nnlsqbhd6rdehnf3w63xosusky" style="color: black;">Progress In Electromagnetics Research C</a> </i> &nbsp;
Two novel designs for compact reconfigurable antennas are introduced for wireless communication devices. These designs solve the steering frequency problem by tracking the desired resonance frequency or by generating various operating frequency bands to be selected electronically. In the first design, the length of the rectangular defected ground structure (RDGS) is electrically adjusted to change the resonant frequency of the MPA. While in the second design different turns of spiral AMC ground
more &raquo; ... plane generate frequency bands, or modes, that are selected/optimized to serve different communication systems simultaneously. These systems may include various combinations of bluetooth, S-band and wireless local-area network (WLAN). These designs have several advantages as the total antenna volume can be reused, and therefore the overall antenna will be compact, although, the radiation of the MPA is kept fixed without any degradation. The designs are verified through both numerical simulations and measurement of a fabricated prototype. The results confirm good performance of the single and multiband reconfigurable antenna designs.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.2528/pierc10011503">doi:10.2528/pierc10011503</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/vultmhypj5ao3kngvbs2ozyl34">fatcat:vultmhypj5ao3kngvbs2ozyl34</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20190429132243/http://www.jpier.org/PIERC/pierc12/16.10011503.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/fd/28/fd2879f358bfd78bb7d75edf7dfae9db53487f88.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.2528/pierc10011503"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> Publisher / doi.org </button> </a>

ULTRA-WIDE BANDWIDTH MICROSTRIP MONOPOLE ANTENNA BY USING ELECTROMAGNETIC BAND-GAP STRUCTURES

Dalia Mohammed Nasha Elsheakh, Hala A. Elsadek, Esmat Abdel-Fattah Abdallah, Hadia M. El-Hennawy, Magdy F. Iskander
<span title="">2011</span> <i title="EMW Publishing"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/yxxuhf2jyveuhk2thdfvjwj7ea" style="color: black;">Progress In Electromagnetics Research Letters</a> </i> &nbsp;
A novel compact design for ultra-wide bandwidth (UWB) planar monopole antenna is presented in this paper. The basis for achieving the UWB operation is through using semicircular microstrip monopole antenna with modified ground plane in the form of semi circular umbrella like shape. This shape produces bandwidth ranging from 3 to 35 GHz with discontinuities from 7 GHz to 10 GHz, from 12.5 GHz to 17.5 GHz and from 22 GHz to 40 GHz. The antenna size is reduced by 27% relative to the size of
more &raquo; ... ional rectangular monopole patch antenna. Metamaterial structures are used for further antenna performance improvement. Two types of metamaterial namely EBG and DGS are studied. First, embedding metallo EBG (EMEBG) is used to eliminate ripples in the operating band and also further reducing the antenna size by more than 30% as compared to the proposed patch. The antenna design provides an impedance bandwidth of more than 33 GHz. Second, four arms spiral defected ground structure (SDGS) is used as a ground plane with four arms to further improve the antenna performance. The SAMC reduced the antenna size by more than 48% as compared to the proposed antenna patch, increased bandwidth, and decreased the cross polarization effect. Finally, embedded EBG together with SDGS ground plane are studied to take advantages of both techniques.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.2528/pierl11020805">doi:10.2528/pierl11020805</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/bwe3x7gpbjdtzpojsof6ucxsk4">fatcat:bwe3x7gpbjdtzpojsof6ucxsk4</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20170706105802/http://www.jpier.org/PIERL/pierl23/12.11020805.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/a3/3b/a33b627efed961ecb16517d3a49a4257a021a5d4.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.2528/pierl11020805"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> Publisher / doi.org </button> </a>

RF Energy Harvesting IoT System for Museum Ambience Control with Deep Learning

Nermeen A. Eltresy, Osama M. Dardeer, Awab Al-Habal, Esraa Elhariri, Ali H. Hassan, Ahmed Khattab, Dalia N. Elsheakh, Shereen A. Taie, Hassan Mostafa, Hala A. Elsadek, Esmat A. Abdallah
<span title="2019-10-15">2019</span> <i title="MDPI AG"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/taedaf6aozg7vitz5dpgkojane" style="color: black;">Sensors</a> </i> &nbsp;
Museum contents are vulnerable to bad ambience conditions and human vandalization. Preserving the contents of museums is a duty towards humanity. In this paper, we develop an Internet of Things (IoT)-based system for museum monitoring and control. The developed system does not only autonomously set the museum ambience to levels that preserve the health of the artifacts and provide alarms upon intended or unintended vandalization attempts, but also allows for remote ambience control through
more &raquo; ... rized Internet-enabled devices. A key differentiating aspect of the proposed system is the use of always-on and power-hungry sensors for comprehensive and precise museum monitoring, while being powered by harvesting the Radio Frequency (RF) energy freely available within the museum. This contrasts with technologies proposed in the literature, which use RF energy harvesting to power simple IoT sensing devices. We use rectenna arrays that collect RF energy and convert it to electric power to prolong the lifetime of the sensor nodes. Another important feature of the proposed system is the use of deep learning to find daily trends in the collected environment data. Accordingly, the museum ambience is further optimized, and the system becomes more resilient to faults in the sensed data.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.3390/s19204465">doi:10.3390/s19204465</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/z4k7b6l7sjbs3k3i6bp7qcupea">fatcat:z4k7b6l7sjbs3k3i6bp7qcupea</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200216130942/https://res.mdpi.com/d_attachment/sensors/sensors-19-04465/article_deploy/sensors-19-04465.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/66/94/6694324595fd509c8fc625a198192c56c73a1b4e.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.3390/s19204465"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> mdpi.com </button> </a>

Smart Home IoT System by Using RF Energy Harvesting

Nermeen A. Eltresy, Osama M. Dardeer, Awab Al-Habal, Esraa Elhariri, Abdelrhman M. Abotaleb, Dalia N. Elsheakh, Ahmed Khattab, Shereen A. Taie, Hassan Mostafa, Hala A. Elsadek, Esmat A. Abdallah, Qiang Wu
<span title="2020-12-01">2020</span> <i title="Hindawi Limited"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/zlknqk4ahbcsthbafxw55emm7a" style="color: black;">Journal of Sensors</a> </i> &nbsp;
IoT system becomes a hot topic nowadays for smart home. IoT helps devices to communicate together without human intervention inside home, so it is offering many challenges. A new smart home IoT platform powered using electromagnetic energy harvesting is proposed in this paper. It contains a high gain transmitted antenna array and efficient circularly polarized array rectenna system to harvest enough power from any direction to increase lifetime of the batteries used in the IoT system. Optimized
more &raquo; ... energy consumption, the software with adopting the Zigbee protocol of the sensor node, and a low-power microcontroller are used to operate in lower power modes. The proposed system has an 84.6-day lifetime which is approximately 10 times the lifetime for a similar system. On the other hand, the proposed power management circuit is operated at 0.3 V DC to boost the voltage to ~3.7 V from radio frequency energy harvesting and manage battery level to increase the battery lifetime. A predictive indoor environment monitoring system is designed based on a novel hybrid system to provide a nonstatic plan, approve energy consumption, and avoid failure of sensor nodes in a smart home.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1155/2020/8828479">doi:10.1155/2020/8828479</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/oqgn3vgfizcplisi4px3shemrq">fatcat:oqgn3vgfizcplisi4px3shemrq</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20201204093449/http://downloads.hindawi.com/journals/js/2020/8828479.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/17/33/1733ad334e53ff607848f1084913cc1d3dc6c564.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1155/2020/8828479"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> hindawi.com </button> </a>
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