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  Subjects -> ELECTRONICS (Total: 186 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 6)
Advances in Electronics     Open Access   (Followers: 89)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Power Electronics     Open Access   (Followers: 35)
Advancing Microelectronics     Hybrid Journal  
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 331)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 26)
Annals of Telecommunications     Hybrid Journal   (Followers: 9)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 9)
Archives of Electrical Engineering     Open Access   (Followers: 14)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 29)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 19)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 38)
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 13)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 1)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 47)
China Communications     Full-text available via subscription   (Followers: 8)
Chinese Journal of Electronics     Hybrid Journal  
Circuits and Systems     Open Access   (Followers: 15)
Consumer Electronics Times     Open Access   (Followers: 5)
Control Systems     Hybrid Journal   (Followers: 289)
ECTI Transactions on Computer and Information Technology (ECTI-CIT)     Open Access  
ECTI Transactions on Electrical Engineering, Electronics, and Communications     Open Access  
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 116)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 96)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 99)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elkha : Jurnal Teknik Elektro     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 55)
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage Materials     Full-text available via subscription   (Followers: 3)
EPJ Quantum Technology     Open Access   (Followers: 1)
EURASIP Journal on Embedded Systems     Open Access   (Followers: 11)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 6)
Foundations and Trends® in Signal Processing     Full-text available via subscription   (Followers: 10)
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 202)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 4)
IACR Transactions on Symmetric Cryptology     Open Access  
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 99)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 80)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 49)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 9)
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits     Hybrid Journal   (Followers: 1)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 71)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 70)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 57)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 26)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 41)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 19)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 26)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 75)
IEEE Transactions on Signal and Information Processing over Networks     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 5)
IET Cyber-Physical Systems : Theory & Applications     Open Access   (Followers: 1)
IET Energy Systems Integration     Open Access  
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 35)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 51)
IET Smart Grid     Open Access  
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 18)
IETE Journal of Education     Open Access   (Followers: 4)
IETE Journal of Research     Open Access   (Followers: 11)
IETE Technical Review     Open Access   (Followers: 13)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access   (Followers: 3)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 69)
Industrial Technology Research Journal Phranakhon Rajabhat University     Open Access  
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 35)
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription   (Followers: 1)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 13)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 18)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 10)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 6)
International Journal of Control     Hybrid Journal   (Followers: 11)
International Journal of Electronics     Hybrid Journal   (Followers: 7)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 13)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 3)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Hybrid Intelligence     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 15)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 8)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 4)
International Journal of Power Electronics     Hybrid Journal   (Followers: 25)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 4)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 10)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 6)
International Transaction of Electrical and Computer Engineers System     Open Access   (Followers: 2)
JAREE (Journal on Advanced Research in Electrical Engineering)     Open Access  
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 3)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 11)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 4)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 31)
Journal of Electrical Bioimpedance     Open Access  
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 7)
Journal of Electrical, Electronics and Informatics     Open Access  
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 7)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 8)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronics (China)     Hybrid Journal   (Followers: 5)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Engineered Fibers and Fabrics     Open Access   (Followers: 2)
Journal of Field Robotics     Hybrid Journal   (Followers: 3)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 171)
Journal of Information and Telecommunication     Open Access   (Followers: 1)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 3)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 7)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 10)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal  
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal  
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 10)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 4)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 29)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 11)
Journal of Semiconductors     Full-text available via subscription   (Followers: 5)
Journal of Sensors     Open Access   (Followers: 26)
Journal of Signal and Information Processing     Open Access   (Followers: 9)
Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer     Open Access  
Jurnal Rekayasa Elektrika     Open Access  
Jurnal Teknik Elektro     Open Access  
Jurnal Teknologi Elektro     Open Access  
Kinetik : Game Technology, Information System, Computer Network, Computing, Electronics, and Control     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 7)
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 5)
Microelectronics and Solid State Electronics     Open Access   (Followers: 26)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 41)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal   (Followers: 1)
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Electrical & Electronic Engineering Journal     Open Access  
Open Journal of Antennas and Propagation     Open Access   (Followers: 8)
Optical Communications and Networking, IEEE/OSA Journal of     Full-text available via subscription   (Followers: 15)
Paladyn. Journal of Behavioral Robotics     Open Access   (Followers: 1)
Power Electronics and Drives     Open Access   (Followers: 1)
Problemy Peredachi Informatsii     Full-text available via subscription  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Pulse     Full-text available via subscription   (Followers: 5)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Advances in Communications and Networking Technology     Hybrid Journal   (Followers: 3)
Recent Advances in Electrical & Electronic Engineering     Hybrid Journal   (Followers: 9)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 5)
Revue Méditerranéenne des Télécommunications     Open Access  
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 55)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 4)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 77)
Solid State Electronics Letters     Open Access  
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 13)
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 3)
Synthesis Lectures on Power Electronics     Full-text available via subscription   (Followers: 3)
Technical Report Electronics and Computer Engineering     Open Access  
TELE     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 9)
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Visión Electrónica : algo más que un estado sólido     Open Access   (Followers: 1)
Wireless and Mobile Technologies     Open Access   (Followers: 6)
Wireless Power Transfer     Full-text available via subscription   (Followers: 4)
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 11)
Електротехніка і Електромеханіка     Open Access  

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Journal Cover
IEEE Transactions on Antennas and Propagation
Journal Prestige (SJR): 1.309
Citation Impact (citeScore): 5
Number of Followers: 70  
  Full-text available via subscription Subscription journal
ISSN (Print) 0018-926X
Published by IEEE Homepage  [191 journals]
  • IEEE Transactions on Antennas and Propagation
    • Abstract: Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • IEEE Transactions on Antennas and Propagation
    • Abstract: Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Institutional Listings
    • Abstract: Presents a listing of institutions relevant for this issue of the publication.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Guest Editorial for the Special Issue on Wireless Real-time Health
           Monitoring Technology for Personalized Medicine
    • Authors: Gianluca Lazzi;Raphael Lee;Konstantina S. Nikita;
      Pages: 4946 - 4954
      Abstract: Recent global focus on healthcare has stimulated research and development of innovative technologies which address many sustainability issues of the current healthcare provision models. Rapid advances in mobile, wireless, and sensing technologies have enabled new opportunities in healthcare, enabling cost-effective and efficient healthcare delivery in home, hospital, assisted living, and nursing home settings [1]. Remote diagnosis, patient and elderly monitoring, sensing of vital parameters of people suffering from chronic diseases such as asthma, diabetes, neurodegenerative and cardiovascular diseases, are just a few examples.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Compact Implantable Antennas for Cerebrospinal Fluid Monitoring
    • Authors: Mohamed Manoufali;Konstanty Bialkowski;Beadaa Mohammed;Paul C. Mills;Amin M. Abbosh;
      Pages: 4955 - 4967
      Abstract: The changes in dielectric properties of cerebrospinal fluid (CSF) can be utilized in diagnosis of cognitive diseases. The aim of this paper is to investigate the employability of an implantable antenna to concurrently operate as a radiator and sensor of the dielectric properties of CSF. The antennas exploit narrow slits and gaps as capacitors for sensing the permittivity of CSF. Three antennas are designed based on capacitively loaded loop (CLL), complementary split ring loop (CSRL), and interdigital capacitor loop (IDCL). To investigate if the dielectric properties of CSF are a function of age, in vitro measurements of different CSF from pigs with different ages are measured in the sub-1-GHz band (0.1–1 GHz). The results reveal a strong pairwise correlation exceeding 0.77 for permittivity and 0.83 for conductivity among samples. Hence, the dielectric properties of the CSF do not reflect age-dependence and sensing sensitivity is implicitly not affected by age. Finally, the implantable antennas are fabricated and tested in a realistic environment viz inside a piglet’s head and CSF simulants. The shift in the resonance frequency when the permittivity is increased by 14% at 400 MHz ranges between 31–40 MHz with a relative resonance sensitivity between 6% and 8% for the proposed implantable antennas.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Design and Evaluation of an Antenna Applicator for a Microwave Colonoscopy
    • Authors: Marta Guardiola;Kahina Djafri;Mouloud Challal;Miguel A. González Ballester;Gloria Fernandez-Esparrach;Oscar Camara;Jordi Romeu;
      Pages: 4968 - 4977
      Abstract: This paper presents a design of a compact antenna applicator for a microwave colonoscopy system. Although colonoscopy is the most effective method for colorectal cancer detection, it suffers from important visualization restrictions that limit its performance. We recently reported that the contrast between healthy mucosa and cancer was 30%–100% for the relative permittivity and conductivity, respectively, at 8 GHz, and the complex permittivity increased proportionally to the degeneration rate of polyps (cancer precursors). The applicator is designed as a compact cylindrical array of eight antennas attached at the tip of a conventional colonoscope. The design presented here is a proof-of-concept applicator composed by one transmitting and one receiving cavity-backed U-shaped slot antenna elements fed by an L-shaped microstrip line. The antennas are low profile and present a high isolation at 8 GHz. The antenna performance is assessed with simulations and experimentally with a phantom composed by different liquids.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Fundamental Limits for Implanted Antennas: Maximum Power Density Reaching
           Free Space
    • Authors: Anja K. Skrivervik;Marko Bosiljevac;Zvonimir Sipus;
      Pages: 4978 - 4988
      Abstract: Fundamental limits on antenna performances are of key interest to the antenna designer, as they allow fast assessment of the feasibility of specific antenna requirements. These limits are defined by the key performance indicators (KPI) of specific antennas, such as the directivity for large aperture antennas or the achievable bandwidth on electrically small antennas. These limits have been obtained considering that the antenna radiates into free space. In this contribution, we develop the fundamental limits for implanted antennas, which thus radiate first into a lossy medium. KPIs assessing the quality of a specific antenna radiating into lossy medium are the total radiated power reaching free space (out of the lossy host medium) and the maximum power density obtained at the surface of the lossy host medium. The fundamental limits for implanted antennas proposed in this paper yield upper bounds for both KPIs and have been obtained considering elementary sources radiating into a spherical phantom. The spherical wave expansion of the electromagnetic fields was used to determine all the fields, and the limits obtained yield a useful upper bound for more complex scenarios.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Measurement Data-Based Study on the Intrabody Propagation in the Presence
           of the Sternotomy Wires and Aortic Valve Implant
    • Authors: Mariella Särestöniemi;Carlos Pomalaza-Ráez;Timo Kumpuniemi;Matti Hämäläinen;Richard Kovacs;Jari Iinatti;
      Pages: 4989 - 5001
      Abstract: This paper presents a comprehensive study on the impact of sternotomy wires and a medical implant on the ultra-wideband (UWB) channel characteristics by studying intrabody propagation in the vicinity of on-body antennas. The main contribution on this paper is to verify propagation path calculations with measurement data taken from a volunteer that has sternotomy wires and an aortic valve implant and from a reference volunteer without any implants. Furthermore, the impact of sternotomy wires and the aortic valve implant is confirmed by finite integration technique (FIT) simulations using a tissue layer model. It is shown that additional signal peaks and variations of the channel impulse responses (CIRs) are observed for the medical implant case since both sternotomy wires and aortic valve implant contain highly conductive materials which affect the channel characteristics. In the time domain simulation results, the difference between the channel strength of the implanted and nonimplanted cases varies between 5 and 17 dB within the time range corresponding to the relevant propagation paths. This phenomenon should be taken into account when designing on-body monitoring devices and when choosing sensor node locations to avoid interference due to the additional multipath propagated signal components. On the other hand, knowledge of the impact of the aortic valve implant may be utilized in the design of devices that can monitor the functionality of a valve implant during the heartbeat.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Wideband UHF DQPSK Backscatter Communication in Reverberant Cavity Animal
           Cage Environments
    • Authors: Apoorva Sharma;Eleftherios Kampianakis;James Rosenthal;Alexandra Pike;Anissa Dadkhah;Matthew S. Reynolds;
      Pages: 5002 - 5011
      Abstract: Many neuroscience experiments with animal subjects require free motion of the animal within a metal cage environment. In such cage environments, wireless communication with implanted devices, e.g., neural recording and stimulation is particularly challenging because the metal cage walls form a reverberant cavity with dense multipath. In the case of backscatter communication with the implanted device, the multipath challenge is particularly acute because of the round-trip nature of the backscatter channel. This paper demonstrates the reverberant cavity effect via measurement of the channel transfer function inside a metal cage used for nonhuman primate research in the 902–928 MHz ultrahigh-frequency industrial, scientific, and medical band. A reduced-size ceramic patch antenna developed for the Neurochip neural recording and stimulation device was affixed to a saline tissue proxy, while a commercial air-dielectric patch antenna was affixed to the ceiling of the cage. A measured 3 dB channel bandwidth greater than 6.5 MHz with a port-to-port insertion loss between 14 and 37 dB was achieved at 126 surveyed locations within the cage volume. A 6.25 Mb/s backscatter data uplink using a differential quadrature phase shift keying constellation was successfully validated inside the cage, with effectively 0% packet error rate for all but two of the surveyed locations. The simulation and experimental results show good agreement and reveal that wideband backscatter communication systems can perform well despite the significant multipath inside the reverberant cage environment.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Analysis and Design of a 3-Coil Wireless Power Transmission System for
           Biomedical Applications
    • Authors: Manjunath Machnoor;Erik Saturnino Gámez Rodríguez;Pragya Kosta;John Stang;Gianluca Lazzi;
      Pages: 5012 - 5024
      Abstract: Wireless power transfer is a practical and widely used method to power various implantable devices. Commonly, the implanted receiver (RX) must be small, often on the order of millimeter, which poses significant design challenges. In this paper, a technique to improve the performance of systems with a size (inductance)-limited implanted RX coil is explored. Conventionally, only mutual coupling between coils is used to optimize the performance, which constrains the layout/geometry and choice of coils. In the proposed system, mutual coupling, mutual capacitance, and relative polarity can all be used, thereby reducing the constraints on coil layouts. Performance is further enhanced by two additional techniques that maximize the reflected impedance between the RX coils. Three designs (two-coil, conventional three-coil, and the proposed three-coil) are implemented with a 35 mm diameter RX coil, and their performance is measured at 5 MHz with a 1 $text{k}Omega $ load resistance. The efficiency of these designs is measured at varying distances (20–60 mm) between the transmitter and RX. The efficiency of the proposed three-coil system at 50 mm separation is 40%, while the implemented conventional three-coil system and the two-coil system are each less than 10%. Finally, the advantage of the proposed strategy in terms of RX coil current and load tolerance is discussed.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • UWB Path Loss Models for Ingestible Devices
    • Authors: Sofia Perez-Simbor;Carlos Andreu;Concepción Garcia-Pardo;Matteo Frasson;Narcis Cardona;
      Pages: 5025 - 5034
      Abstract: Currently, medical devices such as the wireless capsule endoscopy (WCE) are used for data transmission from inside to outside the body. However, for certain applications such as WCE, the data rates offered by the current medical frequency bands can be insufficient. Ultrawideband (UWB) frequency band has become an interesting solution for this. However, to date, there is no formal channel path loss (PL) model for the UWB frequency band in the gastrointestinal (GI) scenario due to the huge differences between the proposed studies. There are three main methodologies to characterize the propagation channel, software simulations, and experimental measurements either in phantom or in in vivo animals. Previous works do not compare all the methodologies or present some disagreements with the literature. In this paper, a dedicated study of the PL using the three aforementioned methodologies (simulations, phantoms, and in vivo measurements) and a comparison with previous studies in the literature is performed. Moreover, numerical values for a PL model which agrees with the three methodologies and the literature are proposed. This paper aims at being the starting point for a formal PL model in the UWB frequency band for wireless body area networks in the GI scenario.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • UWB RSS-Based Localization for Capsule Endoscopy Using a Multilayer
           Phantom and In Vivo Measurements
    • Authors: Martina Barbi;Concepcion Garcia-Pardo;Andrea Nevárez;Vicente Pons Beltrán;Narcís Cardona;
      Pages: 5035 - 5043
      Abstract: In recent years, the localization for capsule endoscopy applications using ultrawideband (UWB) technology has become an attractive field of investigation due to its potential benefits for patients. The literature concerning performance analysis of radio frequency-based localization techniques for in-body applications at UWB frequencies is very limited. Available studies mainly rely on finite-difference time-domain simulations, using digital human models and on experimental measurements by means of homogeneous phantoms. Nevertheless, no realistic analysis based on multilayer phantom measurements or through in vivo experiment has been reported yet. This paper investigates the performance of the received signal strength-based approach for 2-D and 3-D localizations in the UWB frequency band. For 2-D localization, experimental laboratory measurements using a two-layer phantom-based setup have been conducted. For 3-D localization, data from a recently conducted in vivo experiment have been used. Localization accuracy using path loss models, under ideal and non-ideal channel estimation assumptions, is compared. Results show that, under nonideal channel assumption, the relative localization error slightly increases for the 2-D case but not for the in vivo 3-D case. Impact of receivers selection on the localization accuracy has also been investigated for both 2-D and 3-D cases.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • A Compact Dual-Band Dual-Polarized Omnidirectional Antenna for On-Body
    • Authors: Shankar Bhattacharjee;Santanu Maity;Sekhar Ranjan Bhadra Chaudhuri;Monojit Mitra;
      Pages: 5044 - 5053
      Abstract: A compact dual-band dual-polarized wearable antenna for on-body communication in the 2.45 and 5.8 GHz ISM bands is presented. The antenna is linearly polarized (LP) at 2.45 GHz and circularly polarized (CP) with the conical pattern at 5.8 GHz, which is suitable for the multisensor link network. By using the characteristic modal analysis initially, the ground plane has been miniaturized and optimized to radiate an omnidirectional beam in the horizontal plane with the excitation of the $lambda $ /4 resonant mode. The higher order band at 5.8 GHz has been realized by the excitation of the $3lambda $ /4 resonant mode of the same L-shaped slot. These two odd-order modes radiate horizontally polarized omnidirectional patterns. The combination of the vertical polarization generated from the top-loaded patch antenna along with the $3lambda $ /4 mode from the L-shaped slot resulted into omnidirectional CP in the 5.8 GHz band. Furthermore, enhancement in axial ratio bandwidth is achieved with the addition of dielectric superstrate over the feed layer. Bending sensitivity study to emphasize for conformal applications, transmission loss along with specific absorption rate analysis has been performed for on-body characterization. The simulated and measured results are found to be in good agreement.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Bio-Matched Horn: A Novel 1–9 GHz On-Body Antenna for Low-Loss
           Biomedical Telemetry With Implants
    • Authors: John Blauert;Asimina Kiourti;
      Pages: 5054 - 5062
      Abstract: We present the Bio-Matched Horn antenna: a novel 1.773 cm3 on-body antenna for very low-loss communication with wireless implants across the 1–9 GHz bandwidth. To achieve this unique performance, the Bio-Matched Horn is composed of water-filled holes used to mimic the frequency-dependent permittivity of the underlying tissue over its entire bandwidth. The horn shape further allows the proposed antenna to communicate efficiently through the biological tissue for both subcutaneous and deep-tissue wireless implants. Measurement results at 2.4 GHz are in good agreement with simulations and show a transmission loss of 8.01 dB to a 4 mm-deep implant and 19.21 dB to a 2 cm-deep implant. Compared to the previous designs, this is a remarkable improvement by 14.5 and 10.8 dB for subcutaneous and deep-tissue communication, respectively. In this paper, we discuss the operation principle and design of the Bio-Matched Horn, its performance for subcutaneous and deep-tissue implant telemetry, sensitivity to rotational and positional misalignments, and specific absorption rate performance.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Development of a 2.45 GHz Antenna for Flexible Compact Radiation Dosimeter
    • Authors: Ololade M. Sanusi;Farhan A. Ghaffar;Atif Shamim;Mohammad Vaseem;Ying Wang;Langis Roy;
      Pages: 5063 - 5072
      Abstract: Numerous medical operations employ blood transfusions, requiring X-ray irradiated blood for safety concerns. Current irradiation techniques can be significantly improved by replacing standard visual indicators with wireless dosimeter tags that automate the process, reducing inefficiencies, and eliminating blood wastage. A key requirement of the proposed dosimeter tag is flexible and efficient antennas that can be mounted on blood bags. This paper presents the design of a low-cost inkjet-printed dipole antenna on flexible Kapton substrate for a 2.45 GHz radio frequency identification (RFID) dosimeter tag. The tag is to be used in a lossy blood environment, which can severely affect antenna radiation performance. To mitigate this, the concept of artificial magnetic conductor (AMC) unit cells is investigated for best impedance and gain performance. When integrated with a dipole radiator, the fabricated AMC-backed antenna maintains broadside radiation with gains of 4.1–4.8 dBi under planar and bending conditions, and on a lossy blood bag. In a rectenna configuration, the antenna can power sensors for ranges up to 1 m. Measured output dc voltages up to 1.7 V are achieved across a 25 $text{k}Omega $ resistor. This antenna design is flexible, compact, efficient on lossy structures, and suitable for direct integration with biomedical sensing chips.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Collimated Beam FMCW Radar for Vital Sign Patient Monitoring
    • Authors: Arnau Prat;Sebastián Blanch;Albert Aguasca;Jordi Romeu;Antoni Broquetas;
      Pages: 5073 - 5080
      Abstract: Patient monitoring of vital signals such as breathing rhythm and heartbeat rate can be done remotely by the use of a radar system. This approach is advantageous since it does not require any contact with the patient. Obviously, contactless monitoring results in a more comfortable situation for the patient, and in occasions, it is almost mandatory as in the case of heavy burned or newborn patients. Moreover, additional information such movement patterns are also available. A 120 GHz frequency modulated continuous wave radar is described with special focus on the design, construction, and testing of a specific reflector antenna for the system. The system is based on a commercial radar chipset that includes its own antennas. The challenge has been to design the optimum reflector and to build it and test it in a cost-effective way. The reflector has been 3-D printed and a near-field testing technique has been implemented to assess its performance. The results show that the system is able to measure the vital signs at distances beyond 1 m.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • A Simple Concurrent Parameter Estimation Method Suitable for Noncontact
           Vital Sensing Using a Doppler Sensor
    • Authors: Yukihiro Kamiya;
      Pages: 5081 - 5092
      Abstract: In this paper, a simple concurrent parameter estimation method for multiple periodic signals is proposed, which provides extensive performance evaluations through computer simulations. This method is suitable for vital sensing using a Doppler sensor. It enables us to simultaneously estimate the number of targets, periods, directions, and fundamental waveforms of each of the multiple targets. Particularly, simulation results clarify that the proposed method allows estimating the directions of multiple targets even if the number of the targets exceeds the degree of freedom of receiver antennas. In addition, it is emphasized that the direction estimation by the proposed method is robust against the coherence among the incoming signals.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Compact 3-D Antenna for Medical Diagnosis of the Human Head
    • Authors: Md. Rokunuzzaman;Asif Ahmed;Thomas C. Baum;Wayne S. T. Rowe;
      Pages: 5093 - 5103
      Abstract: A compact 3-D antenna for microwave medical diagnosis is presented. The antenna is matched with an inhomogeneous human head allowing higher signal penetration so as to obtain more meaningful data reflected from inside the brain. Utilizing a folded inverted F-like structure and a slot-loaded ground plane, the antenna is a compact $0.23,,lambda times 0.23 ,,lambda times 0.04 ,,lambda $ in size with respect to the lowest operating frequency. The antenna is backed with a rectangular cavity to minimize sidelobe and backlobe radiation. The cavity and folded antenna configuration achieve a highly directional radiation pattern toward the head with a front-to-back ratio of more than 17 dB. A curved inhomogeneous human head phantom is fabricated to validate the antenna performance for medical diagnosis applications. An operational frequency band from 1 to 1.7 GHz is achieved with the antenna attached to the surface of the phantom. Less than 0.0147 W/kg SAR is achieved throughout the operating frequency range, which is lower than the state of the art for comparable antennas. The salient characteristics of the proposed antenna make it a suitable candidate for microwave diagnosis of the human head.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Pattern Reconfigurable Wideband Loop Antenna for Thorax Imaging
    • Authors: Sasan Ahdi Rezaeieh;Ali Zamani;Amin M. Abbosh;
      Pages: 5104 - 5114
      Abstract: A unidirectional loop antenna that can achieve wideband pattern reconfigurability from −40° to +40° in the azimuth plane is presented. The antenna is designed to fulfill the multislice (level) scanning requirements of electromagnetic imaging systems for thorax imaging. To overcome the need for positioning of several antenna arrays, and hence eliminate the mutual coupling related complications, a square loop antenna with reconfigurable pattern is designed. To create a unidirectional radiation, the loop is loaded with capacitive gaps, which convert its radiation mechanism to that of two virtual dipole arrays with quadrature phase excitation. By utilizing this feature, the location of the gaps is varied on the loop’s structure to form virtual dipole arrays in different directions, thus rotating the radiation pattern without physically moving the structure of the antenna. As a proof of concept, six gaps were created on the loop and each gap is loaded with a p-i-n diode to electronically switch between the positions of the designed gaps, thus enabling changing the radiation direction. The proposed antenna can achieve a compact size of $0.32lambda times 0.32lambda times 0.002lambda $ ( $lambda $ is the wavelength of the lowest resonance of the antenna) and a wide fractional bandwidth of 32% at 0.8–1.15 GHz, with a peak gain and front-to-back ratio of 2.1 dBi and 8 dB, respectively. The antenna is successfully tested on a thorax imaging platform to detect small volume of water (5 mL) inside lungs as an emulation of early pulmonary edema.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • A Novel Flexible Electrotextile 3T MRI RF Coil Array for Carotid Artery
           Imaging: Design, Characterization, and Prototyping
    • Authors: Daisong Zhang;Yahya Rahmat-Samii;
      Pages: 5115 - 5125
      Abstract: Magnetic resonance imaging (MRI) is one of the most powerful imaging modality in clinics and is essential for the diagnosis of strokes through carotid artery imaging. The limiting factor for high-quality MRI is the signal-to-noise ratio (SNR) performance of the radio frequency (RF) coils. The current RF surface coils, however, are made of rigid or semiflexible materials with very limited bending properties. As a result, their SNR is limited because they cannot be placed very close to the imaging area, thus receiving noises from parts of the human body, which are not intended to be imaged. Taking advantage of the computerized embroidery and laser cutting technology, in this paper, we utilize electrotextile to design, fabricate, and measure multilayer RF coil array system for 3 Tesla (3T) MRI to improve the SNR performance. The proposed RF coil array system provides an ergonomic and high-performance solution to the 3T MRI systems. A roadmap to systematically design electrotextile RF coil arrays is proposed. RF coil array is characterized to have the accurate resonant frequency, good impedance matching, and low mutual coupling. In addition, magnetic field distribution, bending effects, and human body effects are also discussed. A systematic method to characterize the performance of the electrotextile pattern is studied and used to assist the development and performance characterization. Finally, the high resolution and high SNR images of various kinds of phantoms are obtained using the University of California at Los Angeles (UCLA) Antenna Lab electrotextile coil array after its integration with the 3T MRI scanners at UCLA David Geffen School of Medicine Translational Research Imaging Center. Compared with the conventional surface coil, more than 10 dB SNR increase is observed at the depth of 0.5 cm and 3 dB increase at the depth of 3 cm.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Introducing IEEE Collabratec
    • Pages: 5126 - 5126
      Abstract: Advertisement, IEEE.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • Member Get-A-Member (MGM) Program
    • Pages: 5127 - 5127
      Abstract: Advertisement, IEEE.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
  • IEEE Open Access Publishing
    • Pages: 5128 - 5128
      Abstract: Advertisement, IEEE.
      PubDate: Aug. 2019
      Issue No: Vol. 67, No. 8 (2019)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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Fax: +00 44 (0)131 4513327
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