Multiferroic Antennas For Use In Biomedical Applications
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| Author | : Emily Burnside |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2023 |
| Genre | : |
| ISBN | : |
While there is a need for low frequency (30-300 kHz) communication through lossy media like seawater and the human body, these dielectric cluttered environments present challenges to conventional communication devices in the form of signal attenuation. This is due to the interaction of the electric field component of electromagnetic radiation with the conductive portions of the surrounding media. Magnetoelectric antennas provide a solution to this problem in that they primarily output magnetic energy in the near field. Furthermore, by using strain-driven magnetoelectric antennas, antenna miniaturization is realizable by operating at acoustic resonance rather than electromagnetic resonance. While there have been successful experimental demonstrations of low frequency magnetoelectric antennas, the community lacks a systematic approach for antenna design and characterization. This first half of this work presents a decoupled system of models including a method for predicting magnetic moments of bulk samples using Landau-Lifshitz-Gilbert micromagnetic simulations, enabling radiation predictions via an analytical dipole model, resulting in a paradigm shift from dipole radiation validations to dipole radiation predictions. This work includes a methodical testing approach to assess the antenna's performance in terms of signal strength, quality factor, and radiation patterns, determining the antenna to be comparable to state-of-the-art pacemaker antennas. The second half of this work discusses the design and characterization of a Galfenol antenna which resonates at two distinct frequencies. This second antenna, called a dual band magnetoelectric antenna, allows for communication via frequency shift keying (FSK) and is the first magnetoelectric to accomplish FSK at two resonance frequencies. This work demonstrates that the data bandwidth can be increased by an order of magnitude and discusses potential for future improvement in data bandwidth. This dissertation also features a discussion on parasitic effects and mitigation techniques as well as material parametric studies for improved antenna performance. This work presents a comprehensive procedural guide for the design, fabrication, and characterization of low frequency magnetoelectric antennas, effectively bridging a gap in the existing literature.
| Author | : Yongxin Guo |
| Publisher | : John Wiley & Sons |
| Total Pages | : 610 |
| Release | : 2024-03-14 |
| Genre | : Technology & Engineering |
| ISBN | : 1119189934 |
Antennas and Wireless Power Transfer Methods for Biomedical Applications Join the cutting edge of biomedical technology with this essential reference The role of wireless communications in biomedical technology is a significant one. Wireless and antenna-driven communication between telemetry components now forms the basis of cardiac pacemakers and defibrillators, cochlear implants, glucose readers, and more. As wireless technology continues to advance and miniaturization progresses, it’s more essential than ever that biomedical research and development incorporate the latest technology. Antennas and Wireless Power Transfer Methods for Biomedical Applications provides a comprehensive introduction to wireless technology and its incorporation into the biomedical field. Beginning with an introduction to recent developments in antenna and wireless technology, it analyzes the major wireless systems currently available and their biomedical applications, actual and potential. The result is an essential guide to technologies that have already improved patient outcomes and increased life expectancies worldwide. Readers will also find: Authored by internationally renowned researchers of wireless technologies Detailed analysis of CP implantable antennas, wearable antennas, near-field wireless power, and more Up to 100 figures that supplement the text Antennas and Wireless Power Transfer Methods for Biomedical Applications is a valuable introduction for biomedical researchers and biomedical engineers, as well as for research and development professionals in the medical device industry.
| Author | : Praveen K. Malik |
| Publisher | : Springer Nature |
| Total Pages | : 269 |
| Release | : 2023-06-01 |
| Genre | : Technology & Engineering |
| ISBN | : 9819902126 |
The book consists of the latest research in biomedical and communication integration. It discusses the fabrication and testing outcomes of the Internet of Things-enabled biomedical applications. The book focuses on recent advances in the field of planar antenna design and their applications in space communication, mobile communication, wireless communication, and wearable applications. Planar antennas are also used in medical applications in microwave imaging, medical implants, hyperthermia treatments, and wireless wellness monitoring. This book presents planar antenna design concepts, methods, and techniques to enhance the performance parameters and applications for IoT and device-to-device communication. It provides the latest techniques used for the design of antennas in terms of their structures, defected ground, MIMO, and fractal design. This book also addresses the specific steps to resolve issues in designing antennas and how to design conformal and miniaturized antenna structures for various applications.
| Author | : Amanda Maria Marotto |
| Publisher | : |
| Total Pages | : 73 |
| Release | : 2019 |
| Genre | : |
| ISBN | : |
Antennas are fundamental elements of nearly all modern communication systems. As electronic devices become smaller, the antennas that operate within them must reduce in size as well. Traditional antennas radiate electromagnetic waves using a conducting electric current. As a result, their dimensions must ideally be on par with electromagnetic wavelength they transmit and receive, making it difficult to appreciably miniaturize antennas for mobile applications. Multiferroic antennas are offered as a possible solution to this problem. Coupling the physical properties of magnetostrictive and piezoelectric materials results in the conversion between magnetic flux and voltage. Because these antennas use an acoustic wave to generate radiation instead of a conduction current, their resonant wavelength sees a reduction in characteristic length by 5 orders-of-magnitude for a given frequency. In this experiment, multiferroic cantilevers are tested in order to study their nonlinear behavior when wirelessly actuated and how it is affected by tuning a bias magnetic field. The multiferroic cantilever is measured in a vacuum chamber, and wirelessly actuated by coils driven by a function generator. Magnetic field strength is measured with a Hall effect sensor. Cantilever displacement and voltage generated for several drive powers is measured as a function of frequency by a laser Doppler vibrometer and spectrum analyzer. This data is then used to characterize the strength of linear and nonlinear wireless actuation of multiferroic cantilevers.
| Author | : Jinzhao Hu |
| Publisher | : |
| Total Pages | : 124 |
| Release | : 2020 |
| Genre | : |
| ISBN | : |
This dissertation focuses on high frequency multiferroic devices from both theoretical and experimental aspects. Some potential applications for high frequency multiferroic: antennas, logic and memory, will be presented in this dissertation. The introduction section provides a fundamental explanation on the multiferroic devices as well as the modeling methods for strain-mediated multiferroic systems. Former researches indicate that the composites of piezoelectric substrate and the magnetoelastic material show great potential on reducing both the devices' size as well as energy consumption. Part I of the dissertation shows multiferroics for antenna applications. Conventionally, antennas such as dipoles and loops rely on an electromagnetic (EM) wave resonance. Therefore, the sizes of such antennas are within the same order of free space wavelength. Multiferroic antenna can transfer the EM wave into an acoustic wave, which has much smaller wavelength compared with the wavelength of the EM wave under the same frequency. In this way, multiferroic antennas show a promising path for reducing the antenna system's size, weight and volume. Also, three multiferroic antennas: shear wave antenna, lamb wave antenna as well as tunable frequency broadband antenna are introduced in this section. The shear wave antenna and lamb wave antenna are studied experimentally, and the tunable frequency broadband antenna is studied theoretically. All of them show great potential on reducing the antenna's size. Part II of this dissertation indicates other applications of multiferroic devices: logic and memory. For the logic aspects, a numerical simulation is performed on in-plane mode Bennett clocking systems. For memory aspects, a new concept for breaking the switch symmetry the high frequency control of the magnetization in nanodisk. In this part, a fully coupled finite element model is used to simulate the switch process of the magnetization in the nanodisks. This voltage-controlled process has potential be used in magnetic memory devices with very low energy dissipations.
| Author | : Yongxin Guo |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2024 |
| Genre | : Medical |
| ISBN | : 9781119189916 |
"Join the cutting edge of biomedical technology with this essential reference The role of wireless communications in biomedical technology is a significant one. Wireless and/or antenna-driven communication between telemetry components now forms the basis of cardiac pacemakers and defibrillators, cochlear implants, glucose readers, and more. As wireless technology continues to advance and miniaturization progresses, it's more essential than ever that biomedical research and development incorporate the latest technology. Antennas and Wireless Power for Biomedical Applications provides a comprehensive introduction to wireless technology and its incorporation into the biomedical field. Beginning with an introduction to recent developments in antenna and wireless technology, it analyzes the major wireless systems currently available and their biomedical applications, actual and potential. The result is an essential guide to technologies that have already improved patient outcomes and increased life expectancies worldwide. Antennas and Wireless Power for Biomedical Applications readers will also find: Authored by internationally renowned researchers of wireless technologies Detailed analysis of CP implantable antennas, wearable antennas, near-field wireless power, and more Up to 100 figures that supplement text Antennas and Wireless Power for Biomedical Applications is a valuable introduction for biomedical researchers and biomedical engineers, as well as for research and development professionals in the medical device industry."--
| Author | : Michael Francis Moon |
| Publisher | : |
| Total Pages | : |
| Release | : 2017 |
| Genre | : |
| ISBN | : 9780355150858 |
Multiferroic materials represent a material system with intrinsic coupling between polarization and magnetization, such that an electric field spontaneously magnetizes the material and vice versa. The magnetoelectric coupling in multiferroics is in sharp contrast to the present antenna design approach of using electric current through a wire to generate or receive electromagnetic (EM) waves. First, multiferroic approaches scale with size, a feature absent in modern antenna design where operating in an electrically small regime is always detrimental. Second, the antenna size in modern antenna designs is dictated by the EM wavelength in free space. In multiferroics, the EM wave is transformed from free space into a mechanical domain slowing the wave speed dramatically and reducing the wavelength. The work presented herein explores the effects of multiferroic transduction as applied to the electrically small antenna problem. A study is carried out to determine materials, geometry, and load impedance for a multiferroic receiving antenna. A multiphysics finite element model is developed to adequately capture the coupled magnetostrictive and piezoelectric physics. A custom particle swarm optimization algorithm is generated to refine the antenna elemental dimensions, and a path forward for fabrication is established. Modeling results were obtained that validated multiferroic architectures as a possible solution to the electrically small antenna problem.
| Author | : John N. Sahalos |
| Publisher | : Springer |
| Total Pages | : 228 |
| Release | : 2019-09-09 |
| Genre | : Technology & Engineering |
| ISBN | : 9783031004148 |
Tunable Materials with Applications in Antennas and Microwaves is a stimulating topic in these modern times. With the explosion of the new generation of the wireless world, greater emphasis than ever before is being placed on the analysis and applications of modern materials. This book describes the characteristics of Ferrites and Ferroelectrics and introduces the reader to Multiferroics. Represents, in a simple manner, the solid state physics and explains the permittivity and permeability tensor characteristics for the tunable materials of infinite and finite dimensions. Gives the applications of tunable materials in resonators, filters, microstrips, striplines, antennas, phase shifters, capacitors, varactors, and frequency selective surfaces. Describes in detail the mathematical analysis for spin and magnetostatic waves for infinite medium, thin slab films, and finite circular discs. The analysis contains original work, which the reader may extend in the future. Provides multiferroics, which are ferrite and ferroelectric composites. Multiferroics are very promising tunable materials which are believed will offer many applications in the near future. Contains the planar transmission lines with analytic formulas for multilayer microstrips, transmission lines, and waveguides with isotropic as well as anisotropic dielectric and magnetic materials. Also, gives the formulas to analyze the layered category of transmission lines with multiferroics. This book is intended for antenna and microwave engineers as well as for graduate students of Materials Science and Engineering, Electrical & Computer Engineering, and Physics Departments.
| Author | : Aleix Garcia Miquel |
| Publisher | : |
| Total Pages | : 241 |
| Release | : 2018 |
| Genre | : |
| ISBN | : |
The use of radiofrequency in biomedical devices is taking on increasing significance due to its contributions to the prevention, diagnosis and treatment of diseases, either for minimally invasive remote monitoring of physiological data or for other applications such as medical imaging and thermal treatments. The advantages provided by radiofrequency fit perfectly inside the new paradigm of predictive, preventive, personalized and participatory medicine (P4 medicine) in which the individual patient is the central focus of the healthcare system. Although the development of biomedical devices with radiofrequency has been studied in depth in recent years, several challenges still remain. In this context, this thesis deals with one of the most important issues: the design and characterization of antennas in the presence of the human body. The main goal of this thesis is to develop new antenna designs that overcome some of the current limitations, such as miniaturization, efficiency, frequency detuning and integration. This thesis also aims to provide tools and new insights for the development of antenna designs in the presence of the human body by analyzing the interaction between the antennas and the surrounding biological medium. The research carried out has two main focuses: the wireless transmission of physiological data (biotelemetry) and microwave hyperthermia for cancer treatments. For the first, the study presents a theoretical framework review of in- body antennas followed by an exhaustive study of their miniaturization process, the manufacturing and the experimental characterization, as well as the phantom influence. Based on these studies, a novel multilayered broadband antenna and a miniaturized RFID tag are presented. And with regard to thermal treatment of breast cancer, an on-body, compact and configurable applicator with a phased antenna array has been developed. In conclusion, the outcomes of this thesis make contributions in two main areas: (1) the antenna design and characterization for use in the presence of human body and (2) the research of new solutions for in-body biomedical devices with biotelemetry and for the treatment of breast cancer through microwave hyperthermia.
| Author | : Mehta, Shilpa |
| Publisher | : IGI Global |
| Total Pages | : 387 |
| Release | : 2024-03-04 |
| Genre | : Technology & Engineering |
| ISBN | : |
In an era dominated by electronic devices and interconnected technologies, the weak point of this technology remains the limited lifespan and lengthy maintenance of conventional batteries. The pervasive use of wireless sensor networks and Internet of Things (IoT) applications has accentuated the inadequacies of battery technology, which has not kept pace with the miniaturization of electronic devices. Frequent battery replacements for remote devices have become a critical bottleneck, hindering the seamless operation of devices that play a pivotal role in various industries. Addressing this universal challenge head-on, Emerging Materials, Technologies, and Solutions for Energy Harvesting emerges as a tool for innovation and sustainability. This book explores energy harvesting, a paradigm shift that transforms ambient energy sources such as thermal gradients, solar energy, radio frequency, and vibration energy into a viable and enduring power solution. By presenting innovative materials, technologies, and solutions, the book is the key to unlocking a future where devices can thrive on efficient, cost-effective, and compact energy harvesting systems, eliminating frequent battery replacements.
