Article
Engineering, Electrical & Electronic
Yanyang Wang, Sen Yan
Summary: The proposed electrically small 3-D antenna utilizes an H-shaped inductive coupling element to feed the antenna, resulting in the generation of a magnetic dipole and a pair of short electric dipoles after being wrapped in cylindrical foam. By combining orthogonal complementary dipoles with the same radiation intensity and quadrature phase difference, a quasi-isotropic radiation pattern is obtained.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Review
Chemistry, Analytical
Sasan Ahdi Rezaeieh, Amin Darvazehban, Azin S. Janani, Amin M. Abbosh
Summary: This paper reviews the progress of research on disruptive technologies for thoracic scanning systems over the past decade, focusing on torso scanning systems that use electromagnetic waves to detect thoracic diseases. The advantages and disadvantages of different systems are compared, and future development possibilities are discussed.
Article
Computer Science, Information Systems
Paul Baumgartner, Anna Masiero, Christian Riener, Thomas Bauernfeind
Summary: Estimating the coupling properties between a radiating structure and other conductive elements is essential in understanding the field behavior of the radiating source. This work presents a Poynting-vector-based approach to classify and visualize the field behavior around simple radiators using numerical simulations, and predicts the coupling behavior in practical applications.
Article
Engineering, Electrical & Electronic
Rajbala Solanki
Summary: This study proposes a novel wideband dipole antenna that operates in three modes and has a wide bandwidth. The third and fifth-order modes are compressed using reflectors and combined with the first-order mode to achieve the wideband operation. Experimental results validate the accuracy of the design concept and computational results.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Bryan Treguer, Thierry Le Gouguec, Pierre-Marie Martin, Rozenn Allanic, Cedric Quendo
Summary: This paper presents the characterization and demonstration of silicon propagation channel control in the wireless network concept at 60 GHz. The aim is to transmit signals in a large frequency band for Networks-on-Chip communication. Slot antennas were designed and measured in the frequency band [30-67 GHz]. The results show the interest of controlling the propagation channel and demonstrate large bandwidths.
Review
Computer Science, Information Systems
Syed Imran Hussain Shah, Sonapreetha Mohan Radha, Pangun Park, Ick-Jae Yoon
Summary: Quasi-isotropic antennas are promising in modern communication systems for their ability to provide full spatial coverage and uniform signal reception. Different design techniques and types of quasi-isotropic antennas, along with their applications and key performance parameters, are thoroughly reviewed and summarized in this work.
Article
Computer Science, Information Systems
Tong He, Hui Ran Zeng, Kai Li
Summary: This paper proposed a semi-analytical method for evaluating the near-field of a VLF electric dipole in a magnetized plasma. The study found that the contributions of the ordinary wave (O-wave) and the extraordinary wave (E-wave) to the near-field are different in this case, and the field generated by the dipole perpendicular to the magnetic field has dominant effects.
Article
Chemistry, Physical
Jinjin Li, Yue Zhang, Xufeng Li, Chunyan Chen, Haihan Zou, Peng Yi, Xiaofang Liu, Ronghai Yu
Summary: In this study, smart electromagnetic functional devices were prepared based on electromagnetic wave responsive materials, showing potential applications in electromagnetic wave control systems and intelligent electromagnetic protection systems. By assembling polydimethylsiloxane films filled with magnetic liquid metal droplets, a tunable electromagnetic interference shielding material was obtained, and strain and magnetic sensors were successfully assembled for precise pressure and magnetic field sensing.
Article
Engineering, Electrical & Electronic
Fateh Benmahmoud, Pierre Lemaitre-Auger, Smail Tedjini
Summary: A folded planar dipole antenna was designed for operation close to the human body. It reduces backward radiation to protect the body from electromagnetic emissions. The antenna has good impedance bandwidth characteristics and mechanical robustness, but lower radiation efficiency.
IEEE ANTENNAS AND PROPAGATION MAGAZINE
(2023)
Article
Engineering, Electrical & Electronic
Anna Hurshkainen, Masoud Sharifian Mazraeh Mollaei, Marc Dubois, Sergei Kurdjumov, Redha Abdeddaim, Stefan Enoch, Stanislav Glybovski, Constantin Simovski
Summary: Phased antenna arrays of dipoles are widely used in ultrahigh field (UHF) magnetic resonance imaging to create controllable radio frequency (RF) magnetic field distributions in the human body. A novel decoupling technique using a periodic structure of five parallel resonant wires, known as a metasurface (MS), has been proposed to reduce distortion of RF fields in the central region of the body.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
David Alan Garren
Summary: This recent analysis explores a new type of magnetic antenna characterized by a specific density variation of electric current flowing on the surface of a sphere. By solving the Maxwell equations, the study obtains an exact solution for the electromagnetic fields generated by the antenna, including both interior and exterior regions of the spherical current shell. The analysis also calculates various radiation properties and reveals that the subject spherical electric current achieves the minimum quality factor.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Huansong Xu, Zhixi Liang, Yuanxin Li, Kuang Wang, Qi Cao, Yunliang Long
Summary: This paper proposes a novel microstrip magnetic dipole (MMD) antenna design that utilizes slot-loaded high-order mode to achieve high broadside gain. By reversing the out-of-phase currents with slot loading, the low broadside gain issue of conventional MMD antennas is improved. The improved antenna demonstrates a large impedance bandwidth and high broadside gain, making it promising for extending signal coverage of WLAN 5.5 GHz applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Kamel S. Sultan, Beadaa Mohammed, Mohamed Manoufali, Amin M. Abbosh
Summary: The study introduced an electromagnetic system based on multistatic radar for imaging knee injuries, utilizing a modified multistatic confocal algorithm to accurately localize different types of ligament tears.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Honglei Wang, Yingda Ren
Summary: The communication performance of magnetic dipoles near the sea surface was analyzed through theoretical and experimental studies, taking into account the influence of the seabed on electromagnetic wave propagation. A model based on vector potential was used to study the radiation of magnetic dipoles in three-layered conducting media. Experimental results confirmed the superiority of horizontal magnetic dipoles in both-way communications between seawater and air. This study contributes to antenna design and system development in wireless data transmission near the sea surface.
IET MICROWAVES ANTENNAS & PROPAGATION
(2022)
Article
Computer Science, Information Systems
Christopher G. Hynes, Rodney G. Vaughan
Summary: The dual-loaded loop is a two-port antenna that can sense two field components. This study extends the theory of the dual-loaded loop to sense arbitrarily located electric and magnetic dipole sources. New general expressions for the tangential electric field on a loop are presented, along with closed-form approximations for the currents at the ports. These expressions serve as a benchmark for validating numerical and physical results for this type of sensor.
Article
Physics, Applied
Zedong Hu, Yixin Shao, Victor Lopez-Dominguez, Pedram Khalili Amiri
Summary: This study proposes and numerically investigates a skyrmionic-magnon-switch (SMS) device, in which a Neel-type skyrmion is used as a programmable scattering center to route spin waves. The results show that the deflection of magnons by a skyrmion strongly depends on the ratio of magnon wavelength to skyrmion diameter. This offers the potential to control the routing of magnons in a network of ferromagnetic wires.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
Nacira Djellal, Djamel E. Mekki, Elena Navarro, Pilar Marin
Summary: This study focuses on the synthesis of Fe65Co35 nanostructured powders using high energy ball milling, and investigates the influence of Pr6O11 on their structural, morphological, and magnetic properties. Results show that the addition of Pr6O11 can enhance the hardness and magnetic properties of Fe-Co powders.
FRATTURA ED INTEGRITA STRUTTURALE-FRACTURE AND STRUCTURAL INTEGRITY
(2022)
Article
Virology
Carla Berengua, Marina Lopez, Montserrat Esteban, Pilar Marin, Paula Ramos, Margarita del Cuerpo, Ignasi Gich, Ferran Navarro, Elisenda Miro, Nuria Rabella
Summary: This study assessed the correlation between SARS-CoV-2 infectivity, days from symptom onset, and Ct value using culture as a reference method. The results showed a significant positive correlation between the probability of isolating SARS-CoV-2 in culture, fewer days of symptoms, and a lower RT-PCR Ct value. In immunocompetent individuals, SARS-CoV-2 infectivity lasts no more than 14 days from symptom onset, while in immunocompromised patients or those with severe COVID-19, infectivity may remain after 14 days. A Ct value <22 always indicates infectivity.
JOURNAL OF CLINICAL VIROLOGY
(2022)
Article
Nanoscience & Nanotechnology
Jesus Lopez-Sanchez, Alvaro Pena, Aida Serrano, Adolfo del Campo, Oscar Rodriguez de la Fuente, Noemi Carmona, Daniel Matatagui, Maria del Carmen Horrillo, Juan Rubio-Zuazo, Elena Navarro, Pilar Marin
Summary: Defective few-layered graphene mesostructures (DFLGMs) are produced from graphite flakes by high-energy milling processes, providing a functional material for microwave absorption purposes. By combining them with amorphous Fe73.5Si13.5B9Cu1Nb microwires (MWs), an improvement in reflection loss coefficient (RLmin) of 47% (-53.08 dB) and an enhancement in effective absorption bandwidth (EAB) of 137% (4 dB) are achieved compared to MW-based paints.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Alvaro Pena, Daniel Matatagui, Filiberto Ricciardella, Leandro Sacco, Sten Vollebregt, Daniel Otero, Jesus Lopez-Sanchez, Pilar Marin, Mari Carmen Horrillo
Summary: This article presents a study on improving the detection sensitivity, recovery, and reproducibility of graphene-based gas sensors for NO2 using UV-assisted technology. The results show that UV irradiation significantly enhances the sensor response and enables complete restoration of the initial state after exposure to the target gas. By optimizing the power densities of UV irradiation and the types of target gases, the sensors are suitable for widespread environmental applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
B. T. Lejeune, Papa Gorgui Birame Gueye, Diego Archilla Sanz, Elena Navarro, Manuel Vazquez, Rafael Perez del Real, Laura H. Lewis, Pilar Marin
Summary: Glass-coated amorphous ferromagnetic microwires with variations in mass loading and parallel wire arrays show exceptional magnetomechanical and wireless giant magnetoimpedance (GMI) responses in different frequency ranges. These microwires have the ability to wirelessly quantify microgram mass differences, with a sensitivity response higher than commercial amorphous magnetic ribbons. Planar arrays of microwires exhibit either constructive or destructive interference compared to single microwire data. The exceptional responsiveness, small diameter, and ease of fabrication highlight the potential of these microwires for various sensor applications.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Hamida Gouadria, Mourad Smari, Taoufik Mnasri, Jallouli Necib, Jesus Lopez Sanchez, Pilar Marin, Atul P. Jamale, Rached Ben Younes
Summary: The present study investigates the influence of Fe insertion on the physical properties of Ba0.95Bi0.05Ti1-xFexO3 (x = 0.025, 0.050, and 0.075) synthesized via sol gel method. The resulting samples exhibit tetragonal crystal structure with space group P4mm, and their morphological features suggest variations in microstructure with Fe content. The temperature-dependent dielectric constant shows two transition phases: ferroelectric-paraelectric transition phase (TF-P) and ferroelectric orthorhombic -ferroelectric tetragonal phase (TO-T). Analysis of conductivity curves using Jonscher's augmented equation (for x = 0.025) and Jonscher's power law (for x = 0.075) indicates the Non-Overlapping Small Polaron Tunneling (NSPT) model as the conduction mechanism.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Physics, Applied
Victor Lopez-Dominguez, Yixin Shao, Pedram Khalili Amiri
Summary: The integration of embedded MRAM technology in mainstream semiconductor manufacturing provides an opportunity for computing systems with improved performance, energy efficiency, and lower cost. The focus of MRAM research is shifting towards alternative write mechanisms and new materials. This Perspective explores the spin-orbit torque as a write mechanism for MRAM devices and discusses progress in developing SOT-MRAM devices with perpendicular magnetization, as well as the challenges and potential applications of these devices.
JOURNAL OF APPLIED PHYSICS
(2023)
Correction
Materials Science, Multidisciplinary
Jallouli Necib, Jesus Lopez-Sanchez, Fernando Rubio-Marcos, Aida Serrano, Elena Navarro, Alvaro Pena, Taoufik Mnasri, Mourad Smari, Rocio Estefania Rojas-Hernandez, Noemi Carmona, Pilar Marin
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Clinical Neurology
Vanesa Soto-Leon, Eva Diez-Rodriguez, Salvador Herrera-Perez, Juliana M. Rosa, Juan Aguilar, Antonio Hernando, Carlota Bravo-Sanchez, Veronica Lopez-Gonzalez, Yolanda Perez-Borrego, Sven Bestmann, Antonio Oliviero
Summary: This study investigated the effects of transcranial static magnetic field stimulation (tSMS) on the dorsolateral prefrontal cortex (DLPFC) function. It found that tSMS can transiently modulate DLPFC function, specifically affecting inhibitory control and response selection. These findings suggest the potential use of tSMS for the treatment of neuropsychiatric disorders.
CLINICAL NEUROPHYSIOLOGY
(2023)
Article
Marine & Freshwater Biology
Ward Standaert, Patricia Puerta, Francesco Mastrototaro, Desiree Palomino, Ricardo Aguilar, Berta Ramiro-Sanchez, Juan-Tomas Vazquez, Olga Sanchez Guillamon, Pilar Marin, Jorge Blanco, Covadonga Orejas
Summary: The bamboo coral Isidella elongata is a vital part of the deep-sea Mediterranean ecosystem, but its population has significantly declined due to fishing impacts. This study focuses on the Mallorca Channel in the western Mediterranean and uses habitat suitability models to better understand its distribution. The models reveal that smooth plains surrounding seamounts are the most suitable habitat for the coral. This information is crucial for implementing effective conservation measures and managing deep-sea fisheries.
Article
Chemistry, Physical
Feriel Zdiri, Jose Maria Alonso, Taoufik Mnasri, Patricia de la Presa, Irene Morales, Jose Luis Martinez, Rached Ben Younes, Pilar Marin
Summary: We investigated the properties of Pr-0.7 Sr-0.3 Mn(1-x)Cox O-3 nanopowders synthesized using the Pechini Sol-gel method. X-ray diffraction revealed an orthorhombic crystal structure for all samples. Magnetic measurements showed a transition from ferromagnetic to paramagnetic with increasing temperature, and the Curie temperature decreased with increasing Co concentration. Electrical resistivity measurements indicated metallic behavior at low temperature and semiconductor behavior above a certain temperature, with significant magnetoresistance values for all samples.
Article
Chemistry, Multidisciplinary
Antonio Hernando, M. Luisa Ruiz-Gonzalez, Omar Diaz, Jose M. Alonso, Jose L. Martinez, Andres Ayuela, Jose M. Gonzalez-Calbet, Raquel Cortes-Gil
Summary: The presence of La-Mn vacancies in LaMnO3 nanoparticles leads to a significant change in conductivity behavior. The sample remains an insulator overall, showing typical thermal activation mechanism at high temperatures, but exhibits high magnetoconductivity below 200 K. The activation energy decreases linearly with the square of the reduced magnetization and disappears when the sample is magnetized at saturation. Therefore, electron hopping between Mn3+ and Mn4+ contributes largely to the conductivity below the Curie temperature. The influence of the applied magnetic field on conductivity also supports the hypothesis of hopping contribution, and the electric behavior can be explained as an increase in hopping probability via spin alignment.
Article
Nanoscience & Nanotechnology
Yixin Shao, Christian Duffee, Eleonora Raimondo, Noraica Davila, Victor Lopez-Dominguez, Jordan A. Katine, Giovanni Finocchio, Pedram Khalili Amiri
Summary: Probabilistic computing is a physics-based approach to solving computational problems that are challenging for traditional computers. Researchers propose a new design for probabilistic bits using perpendicular MTJs and the VCMA effect for random state and fast random number generation. Experimental results demonstrate the feasibility and high-quality random number generation capability of this design.
Letter
Materials Science, Multidisciplinary
Akshar Varma, Xiaoyu Zhang, Brian Lejeune, Laura Cebada Almagro, Rafael P. del Real, Pilar Marin, Ogheneyunume Fitchorova, Laura H. Lewis, Ravi Sundaram
Summary: In this study, machine learning was used to analyze the complex electromagnetic responses of arrangements of amorphous ferromagnetic microwires, demonstrating the potential of these materials for use in tags for secure article surveillance systems.
MRS COMMUNICATIONS
(2023)
