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Design And Optimization Of Efficient Wireless Power Transfer Links For Implantable Biotelemetry Systems
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Book Synopsis Design and Optimization of Efficient Wireless Power Transfer Links for Implantable Biotelemetry Systems by : Shawon Senjuti
Download or read book Design and Optimization of Efficient Wireless Power Transfer Links for Implantable Biotelemetry Systems written by Shawon Senjuti and published by . This book was released on 2013 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless power transmission is a technique that converts energy from radio frequency (RF) electromagnetic (EM) waves into DC voltage, which has been used here for the purpose of providing a power supply to bio-implantable batteryless sensors. The main constraints of the design are to achieve the minimum power required by the application, by still keeping the implant size small enough for the living subject's body. Resonance-based inductive coupling is a method being actively researched for the use in this type of power transmission, which uses two pairs of inductor coils in the external and implant circuits. In this work, we have employed the resonance-based inductive coupling technique in order to develop a design and optimization procedure for the inductors. We have designed two systems with different configurations, and have achieved power transfer efficiencies of around 80% at a coil distance of 50mm for both systems. We have also optimized the power delivered to the load (implant) and developed a power harvesting unit. Misalignment issues due to the subject's movements have been modeled for calculating the worst-case alignment, and finite element modeling of the inductors has been performed.
Book Synopsis Inductive Links for Wireless Power Transfer by : Pablo Pérez-Nicoli
Download or read book Inductive Links for Wireless Power Transfer written by Pablo Pérez-Nicoli and published by Springer Nature. This book was released on 2021-07-10 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a system-level analysis of inductive wireless power transfer (WPT) links. The basic requirements, design parameters, and utility of key building blocks used in inductive WPT links are presented, followed by detailed theoretical analysis, design, and optimization procedure, while considering practical aspects for various application domains. Readers are provided with fundamental, yet easy to follow guidelines to help them design high-efficiency inductive links, based on a set of application-specific target specifications. The authors discuss a wide variety of recently proposed approaches to achieve the maximum efficiency point, such as the use of additional resonant coils, matching networks, modulation of the load quality factor (Q-modulation), and adjustable DC-DC converters. Additionally, the attainability of the maximum efficiency point together with output voltage regulation is addressed in a closed-loop power control mechanism. Numerous examples, including MATLAB/Octave calculation scripts and LTspice simulation files, are presented throughout the book. This enables readers to check their own results and test variations, facilitating a thorough understanding of the concepts discussed. The book concludes with real examples demonstrating the practical application of topics discussed. Covers both introductory and advanced levels of theory and practice, providing readers with required knowledge and tools to carry on from simple to advanced wireless power transfer concepts and system designs; Provides theoretical foundation throughout the book to address different design aspects; Presents numerous examples throughout the book to complement the analysis and designs; Includes supplementary material (numerical and circuit simulation files) that provide a "hands-on" experience for the reader; Uses real examples to demonstrate the practical application of topics discussed.
Book Synopsis Emerging Capabilities and Applications of Wireless Power Transfer by : Triviño-Cabrera, Alicia
Download or read book Emerging Capabilities and Applications of Wireless Power Transfer written by Triviño-Cabrera, Alicia and published by IGI Global. This book was released on 2018-09-21 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technologies that enable powering a device without the need for being connected with a cable to the grid are gaining attention in recent years due to the advantages that they provide. They are a commodity to users and provide additional functionalities that promote autonomy among the devices. Emerging Capabilities and Applications of Wireless Power Transfer is an essential reference source that analyzes the different applications of wireless power transfer technologies and how the technologies are adapted to fulfill the electrical, magnetic, and design-based requirements of different applications. Featuring research on topics such as transfer technologies, circuital analysis, and inductive power transfer, this book is a vital resource for academicians, electrical engineers, scientists, researchers, and industry professionals seeking coverage on device power and creating autonomy through alternative power options for devices.
Book Synopsis Advances in Smart Communication and Imaging Systems by : Rajeev Agrawal
Download or read book Advances in Smart Communication and Imaging Systems written by Rajeev Agrawal and published by Springer Nature. This book was released on 2021-04-13 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents select and peer-reviewed proceedings of the International Conference on Smart Communication and Imaging Systems (MedCom 2020). The contents explore the recent technological advances in the field of next generation communication systems and latest techniques for image processing, analysis and their related applications. The topics include design and development of smart, secure and reliable future communication networks; satellite, radar and microwave techniques for intelligent communication. The book also covers methods and applications of GIS and remote sensing; medical image analysis and its applications in smart health. This book can be useful for students, researchers and professionals working in the field of communication systems and image processing.
Book Synopsis Efficient Wireless Power Transfer with Capacitively Segmented RF Coils by : Sebastian Stöcklin
Download or read book Efficient Wireless Power Transfer with Capacitively Segmented RF Coils written by Sebastian Stöcklin and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Wireless power transfer systems have been widely applied in the field of portable and implantable devices, featuring contact-free and reliable energy supply. Novel implant systems, such as brain-computer interfaces, impose the challenges of strong miniaturization and operation under loosely coupled conditions. Therefore, maximizing power transfer efficiency while decreasing the size of transmitter and receiver structures becomes a central research question. This paper presents a unified design strategy of modeling, analyzing and optimizing planar spiral coils with integrated capacitive elements, so-called capacitively segmented coils, for operation in wireless power transfer interfaces. It mathematically analyzes and experimentally verifies that the combination of capacitive coil segmentation, increased operational frequencies and geometrical coil optimization can be used to establish wireless power transfer links with comparatively high efficiency, small size and limited detuning effects in lossy dielectric environments. The paper embraces the formulation and verification of a broadband analytical link model based on partial element equivalent circuits, which is subsequently used to determine dominant coupling and loss mechanisms and to optimize the coils' geometries for high efficiency. Moreover, an extended analysis shows how the capacitive coil segmentation can effectively suppress dielectric losses and non-uniform current distributions by canceling the inductive contribution of every coil segment at the frequency of operation. Utilizing these methods, an exemplary 40.68MHz wireless power link with a 30mm primary and a 10mm secondary coil is designed and evaluated: With a maximum efficiency of up to 31% in biological tissue at 20mm separation distance, it features efficiency levels which are up to ten times higher and a specific absorption rate which is up to five times lower compared to non-segmented systems. When operated at 150MHz in air, efficiency levels are up to 1.5 times higher than in state-of-the-art systems of the same size
Book Synopsis Compact Size Wireless Power Transfer Using Defected Ground Structures by : Sherif Hekal
Download or read book Compact Size Wireless Power Transfer Using Defected Ground Structures written by Sherif Hekal and published by Springer. This book was released on 2019-05-29 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the design challenges in near-field wireless power transfer (WPT) systems, such as high efficiency, compact size, and long transmission range. It presents new low-profile designs for the TX/RX structures using different shapes of defected ground structures (DGS) like (H, semi-H, and spiral-strips DGS). Most near-field WPT systems depend on magnetic resonant coupling (MRC) using 3-D wire loops or helical antennas, which are often bulky. This, in turn, poses technical difficulties in their application in small electronic devices and biomedical implants. To obtain compact structures, printed spiral coils (PSCs) have recently emerged as a candidate for low-profile WPT systems. However, most of the MRC WPT systems that use PSCs have limitations in the maximum achievable efficiency due to the feeding method. Inductive feeding constrains the geometric dimensions of the main transmitting (TX)/receiving (RX) resonators, which do not achieve the maximum achievable unloaded quality factor. This book will be of interest to researchers and professionals working on WPT-related problems.
Book Synopsis Wireless Power Transfer by : Dr. Johnson I Agbinya
Download or read book Wireless Power Transfer written by Dr. Johnson I Agbinya and published by River Publishers. This book was released on 2012-07-17 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nikola Tesla dream in the early 20th century of a “World Wireless System” led him to build the Wardenclyffe Tower, a prototype base station serving as an emitter for his “World Wireless System”. The base station was to supply wireless supply of electrical energy to a distant receiver. This book builds upon that dream and is a result of intensive research interest in powerline, machine to machine communications and wireless power transfer globally. Wireless energy transfer or Witricity (WIreless elecTRICITY) transfers electricity instead of data. The technology is useful in cases where instantaneous or continuous energy is needed but interconnecting wires are inconvenient, hazardous, or impossible. The transfer is made through inductive coupling and electromagnetic radiation. Inductive coupling provides optimum power delivery to a receiver load if both the emitter and the receiver achieve magnetic resonance concurrently. Energy transfer systems mostly use antennas operating in their near field regions. As fossil energy sources are being depleted rapidly worldwide and oil prices soar, solar energy enhanced with wireless power transfer (WPT) have become reasonable alternatives for renewable energy and power harvesting. They are finding use in transportation, electric and hybrid vehicles, very fast trains and the emerging field of Internet of Things. This book is written by the leading experts on wireless energy transfer technology and its applications. It introduces and explains the technology in great details and provides the theory and practice of WPT through the two approaches of coupled mode theory and circuit theory. Both approaches are dependent on resonance techniques. The level of presentation is suitable for design and training. In depth coverage is provided on near field concepts; coupled-mode theory and models; circuit models of inductive antennas; radiative and inductive wireless power transfer, wireless power relay concepts, optimization techniques for wireless power transfer systems, control of wireless power transfer systems, wireless charging concepts; wireless energy transfer applications in electric vehicles, embedded medical systems and propagation in human tissues. Each chapter is written by experts on a selected aspect of wireless energy transfer. The authors have gone to great lengths to provide worked examples to assist the reader in working through some of the difficult concepts and to allow more understanding. The book is an excellent foundation for applying wireless energy transfer technologies in most fields including transportation, communication, home automation, biomedical systems and home appliances. The book is recommended to practitioners and engineers in the power industry, students in universities and research institutes. Honours and post graduate students in Physics, electrical/electronic engineering and computer science will find the book easy to read and apply because of the mode of presentation.
Book Synopsis Wireless Power Transfer for Medical and Industrial Applications by : Minh Quoc Nguyen
Download or read book Wireless Power Transfer for Medical and Industrial Applications written by Minh Quoc Nguyen and published by . This book was released on 2019 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: My primary research focuses on wireless power transfer technology utilizing in two different areas: medical and industrial applications. In the medical applications, my research focuses on design and optimization methods for spiral coils utilized for wireless power transfer in wireless medical implant applications. A theoretical model was examined for near field distributions of spiral-type transmitter antennas in both orthogonal components. Finite element simulations were performed to verify the theoretical radiation patterns. Receiver antenna voltages were measured at planes of interest as a means to map field distributions. Theoretical, simulation and experimental results were conducted in the free space and they agreed well. Understanding the orthogonal field components and their distributions in various distances between the worn transmitter coil outside the body and the receiver coil of implant that has a much smaller size provides a means to find the optimal location and angle to harvest maximum energy. The analysis method for near-field wireless power transmission can be utilized to determine design strategies of the transmitter spiral coil with also considerations in the amplifier circuit and physical constraints in practical scenarios to obtain maximum power and link efficiency for the implant devices. The method can be extended to investigate field distributions affected by human tissues, which construct a much more complex environment. In the industrial applications, the effect of power combining and delivering in multi-input and multi-output (MIMO) wireless energy transmission systems which consist of more than one transmitter antennas as sources, more than one receiver antennas as loads and repeaters is investigated. Theoretical expressions were developed to model system operation that can be in a large scale wireless energy network architecture. System characteristics such as power transfer between antennas, power losses induced in each antenna, wireless efficiency, coil misalignment and power fluctuation due to the loss of frequency synchronization were examined by theory and verified with experiments. Measurement results matched well with the theory demonstrating the feasibility of combining and delivering power with high efficiencies in large scale wireless energy transmission systems.
Book Synopsis Wireless Power Transfer for Medical Microsystems by : Tianjia Sun
Download or read book Wireless Power Transfer for Medical Microsystems written by Tianjia Sun and published by Springer. This book was released on 2013-06-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an in-depth introduction to the newest technologies for designing wireless power transfer systems for medical applications. The authors present a systematic classification of the various types of wireless power transfer, with a focus on inductive power coupling. Readers will learn to overcome many challenges faced in the design a wirelessly powered implant, such as power transfer efficiency, power stability, and the size of power antennas and circuits. This book focuses exclusively on medical applications of the technology and a batteryless capsule endoscopy system and other, real wirelessly powered systems are used as examples of the techniques described.
Book Synopsis Advanced Systems for Biomedical Applications by : Olfa Kanoun
Download or read book Advanced Systems for Biomedical Applications written by Olfa Kanoun and published by Springer Nature. This book was released on 2021-07-19 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book highlights recent developments in the field of biomedical systems covering a wide range of technological aspects, methods, systems and instrumentation techniques for diagnosis, monitoring, treatment, and assistance. Biomedical systems are becoming increasingly important in medicine and in special areas of application such as supporting people with disabilities and under pandemic conditions. They provide a solid basis for supporting people and improving their health care. As such, the book offers a key reference guide about novel medical systems for students, engineers, designers, and technicians.
Book Synopsis DIRECTIONAL & OMNIDIRECTIONAL by : Cheng Zhang
Download or read book DIRECTIONAL & OMNIDIRECTIONAL written by Cheng Zhang and published by Open Dissertation Press. This book was released on 2017-01-26 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Directional and Omnidirectional Inductively Coupled Wireless Power Transfer Systems" by Cheng, Zhang, 張騁, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: This thesis presents the analysis and design methods of directional and omnidirectional inductively coupled wireless power transfer systems. Such system utilizes multiple coils to generate high frequency alternating magnetic fields in space and allows receivers to pick up power wirelessly in any position. The objective of optimization is to achieve the maximum power efficiency. Such kind of system allows the mobile devices to be continuously charged without staying on a fixed place. Self- and mutual- inductance values of the coils are critical parameters that affect the power efficiency of a wireless power transfer system. An improved numerical calculation method is proposed and is presented in this thesis. It combines the theory of partial equivalent element circuit (PEEC) and empirical equations for calculating certain types of straight conductors. The segmentation method to discretize the conductor is optimized and verified. The accuracy of the proposed method has been tested and compared to both theoretical equations and measurements of practical coils, and is proved to be accurate. The time-varying magnetic fields induced by the coils in a wireless power transfer system is the \transporter" of the energy. A time-efficient visualization method is proposed and is presented in this thesis. While commercial finite element analysis (FEA) software such as ANSYS Maxwell can perform transient analysis, the execution time is extremely long as the accuracy greatly depends on the simulation time steps and the number of iterations. The proposed method calculates the time-instant currents in coils with the derived mathematic model and then directly plots the time-varying magnetic fields. The execution time is shortened to a few of minutes on a desktop computer while the FEA solver takes a couple of hours on the same model. Several types of multiple-coil systems are analyzed with their magnetic field patterns. To transmit power to arbitrary directions, the magnetic field must be controlled with its directions. According to the principle of superposition, a three-orthogonal-coil transmitter structure is proposed. Several current control methods are discussed to achieve omnidirectional wireless power characteristics. One is a continuous scanning type current scheme. The receivers placed in the designated area can receive power with any locations and angles. Another one is a discrete scanning type. It can be used to detect the load position and therefore delivering power to the load with the maximum power efficiency of the overall system. Simulations and experiments have been carried out to verify the theory and they agreed well. While the aforesaid omnidirectional system adopts the special three-orthogonal-coil structure, the theory is generalized to arbitrary numbers of transmitters. It is proved by mathematical derivation that in a system with multiple transmitters and single receiver, there exists an optimal efficiency point when currents in the transmitter coils fulfill the certain relationships, regardless of the compensation scheme of the circuit, the use of magnetic materials and the shapes of the coils. An implementable method to calculate the optimal currents in a practical multiple-transmitter-single-receiver system is also provided. The generalized theory is verified by both simulations and experiments. Subjects: Electric power transmission
Book Synopsis Wireless Power Transfer by : Johnson I. Agbinya
Download or read book Wireless Power Transfer written by Johnson I. Agbinya and published by CRC Press. This book was released on 2022-09-01 with total page 767 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless Power Transfer is the second edition of a well received first book, which published in 2012. It represents the state-of-the-art at the time of writing, and addresses a unique subject of great international interest in terms of research. Most of the chapters are contributed by the main author, though as in the first edition several chapters are contributed by other authors. The authors of the various chapters are experts in their own right on the specific topics within wireless energy transfer. Compared to the first edition, this new edition is more comprehensive in terms of the concepts discussed, and the range of current industrial applications which are presented, such as those of magnetic induction. From the eleven chapters of the first edtion, this second edition has expanded to twenty chapters. More chapters on the theoretical foundations and applications have been included. This new edition also contains chapters which deal with techniques for reducing power losses in wireless power transfer systems. In this regard, specific chapters discuss impedance matching methods, frequency splitting and how to deploy systems based on frequency splitting. A new chapter on multi-dimensional wireless power transfer has also been added. The design of wireless power transfer systems based on bandpass filtering approach has been included, in addition to the two techniques using couple mode theory and electronic circuits.The book has retained chapters on how to increase efficiency of power conversion and induction, and also how to control the power systems. Furthermore, detailed techniques for power relay, including applications, which were also discussed in the first edition, have been updated and kept. The book is written in a progressive manner, with a knowledge of the first chapters making it easier to understand the later chapters. Most of the underlying theories covered in the book are clearly relevant to inductive near field communications, robotic control, robotic propulsion techniques, induction heating and cooking and a range of mechatronic systems.
Book Synopsis Design of Wireless Power Transfer and Data Telemetry System for Biomedical Applications by : Ashraf Bin Islam
Download or read book Design of Wireless Power Transfer and Data Telemetry System for Biomedical Applications written by Ashraf Bin Islam and published by . This book was released on 2011 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the advancement of biomedical instrumentation technologies, sensor based remote healthcare monitoring system is gaining more attention day by day. These sensors can be classified as wearable and implantable. While the wearable sensors are placed outside the body, the implantable types are placed underneath the skin or inside the body cavity typically via surgical means. Implantable sensors are placed inside the human body to acquire the information on the vital physiological phenomena such as glucose, lactate, pH, oxygen, etc. These sensors have associated circuits for sensor signal processing and data transmission. Powering the circuit is always a crucial design issue. Batteries cannot be used in implantable sensors which can come in contact with the blood resulting in serious health risks. An alternate approach is to supply power wirelessly for tether-less and battery- less operation of the circuits. Inductive power transfer is the most common method of wireless power transfer to the implantable sensors. For good inductive coupling, the inductors should have high inductance and high quality factor. But the physical dimensions of the implanted inductors cannot be large due to a number of biomedical constraints. Therefore, there is a need for small sized and high inductance, high quality factor inductors for implantable sensor applications. In this work, design of a multi-spiral solenoidal printed circuit board (PCB) inductor for biomedical application is presented. The targeted frequency for power transfer is 13.56 MHz which is within the license-free industrial, scientific and medical (ISM) band. A figure of merit based optimization technique has been utilized to optimize the PCB inductors. Similar principal is applied to design on-chip inductor which could be a potential solution for further miniaturization of the implantable system. Typically on-chip inductors require very small footprint around few mm2 and accordingly have very small values around tens of nH. To accommodate the small values of inductance the operating frequency needs to be increased to GHz range. For layered human tissue, the optimum frequency of power transfer is 1 GHz for smaller coil size. For this reason, design and optimization of multi-spiral solenoidal integrated inductors for 1 GHz frequency is proposed. Finally, it is demonstrated that the proposed inductors exhibit a better overall performance in comparison with the conventional inductors for biomedical applications.
Book Synopsis A Multiband Inductive Wireless Link for Implantable Medical Devices and Small Freely Behaving Animal Subjects by : Uei-Ming Jow
Download or read book A Multiband Inductive Wireless Link for Implantable Medical Devices and Small Freely Behaving Animal Subjects written by Uei-Ming Jow and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research is to introduce two state-of-the-art wireless biomedical systems: (1) a multiband transcutaneous communication system for implantable microelectronic devices (IMDs) and (2) a new wireless power delivery system, called the "EnerCage," for experiments involving freely-behaving animals. The wireless multiband link for IMDs achieves power transmission via a pair of coils designed for maximum coupling efficiency. The data link is able to handle large communication bandwidth with minimum interference from the power-carrier thanks to its optimized geometry. Wireless data and power links have promising prospects for use in biomedical devices such as biosensors, neural recording, and neural stimulation devices. The EnerCage system includes a stationary unit with an array of coils for inductive power transmission and three-dimensional magnetic sensors for non-line-of-sight tracking of animal subjects. It aims to energize novel biological data-acquisition and stimulation instruments for long-term experiments, without interruption, on freely behaving small animal subjects in large experimental arenas. The EnerCage system has been tested in one-hour in vivo experiment for wireless power and data communication, and the results show the feasibility of this system. The contributions from this research work are summarized as follows: 1. Development of an inductive link model. 2. Development of an accurate PSC models, with parasitic effects for implantable devices. 3. Proposing the design procedure for the inductive link with optimal physical geometry to maximize the PTE. 4. Design of novel antenna and coil geometry for wireless multiband link: power carrier, forward data link, and back telemetry. 5. Development of a model of overlapping PSCs, which can create a homogenous magnetic in a large experimental area for wireless power transmission at a certain coupling distance. 6. Design and optimization for multi-coil link, which can provide optimal load matching for maximum PTE. 7. Design of the wireless power and data communication system for long-term animal experiments, without interruption, on freely behaving small animal subjects in any shape of experimental arenas.
Book Synopsis Efficient Wireless Powering and Reliable Biotelemetry of Neural Implants by : Ahmed Ibrahim Saleem Al-Kalbani
Download or read book Efficient Wireless Powering and Reliable Biotelemetry of Neural Implants written by Ahmed Ibrahim Saleem Al-Kalbani and published by . This book was released on 2014 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of safe implants is one of the key priorities of biomedical engineering. Healthcare professionals are trying to create new and sophisticated strategies to improve and support people with disabilities using implants. The research described in this thesis focuses on developing a power supply from a wireless source for implants that will also serve as a wireless data telemetry channel for communication purposes. The design analysis of inductive coupled biomedical implant is expanded. The proposed method of powering the implant is a Class-E amplifier. An analytic approach is given in relation to tuning the class-E amplifier to maximize power transfer. This thesis culminates in specific recommendations for system level design including coil design, miniaturisation, coupling distance, stability of power supplies, consistent energy transfer and the ensuing electromagnetic exposure.The telemetry system for data transfer between implants and outside world has been also studied. This bio-telemetry system setup should ensure an optimal data rate, proper energy levels, low error rates, and a reliable power source. The efficiency of the system is crucial for these implants, and the use of efficient and low power consumption amplifiers and modulation schemes has been discussed in detail. The advantages of Pulse Width Modulated - Amplitude Shift Keying (PWM-ASK for short) are presented in comparison to current modulation schemes used in nowadays implants. Beside inductive coupled implants, this thesis also introduces a study of designing a wireless powered biomedical implant using capacitive coupling. A comparison between inductive and capacitive coupling is presented, while considering biotelemetry and power efficiency. A capacitive coupled biomedical implant is demonstrated through mathematical terms and simulations.
Book Synopsis Antenna and Sensor Technologies in Modern Medical Applications by : Yahya Rahmat-Samii
Download or read book Antenna and Sensor Technologies in Modern Medical Applications written by Yahya Rahmat-Samii and published by John Wiley & Sons. This book was released on 2021-02-25 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: A guide to the theory and recent development in the medical use of antenna technology Antenna and Sensor Technologies in Modern Medical Applications offers a comprehensive review of the theoretical background, design, and the latest developments in the application of antenna technology. Written by two experts in the field, the book presents the most recent research in the burgeoning field of wireless medical telemetry and sensing that covers both wearable and implantable antenna and sensor technologies. The authors review the integrated devices that include various types of sensors wired within a wearable garment that can be paired with external devices. The text covers important developments in sensor-integrated clothing that are synonymous with athletic apparel with built-in electronics. Information on implantable devices is also covered. The book explores technologies that utilize both inductive coupling and far field propagation. These include minimally invasive microwave ablation antennas, wireless targeted drug delivery, and much more. This important book: Covers recent developments in wireless medical telemetry Reviews the theory and design of in vitro/in vivo testing Explores emerging technologies in 2D and 3D printing of antenna/sensor fabrication Includes a chapter with an annotated list of the most comprehensive and important references in the field Written for students of engineering and antenna and sensor engineers, Antenna and Sensor Technologies in Modern Medical Applications is an essential guide to understanding human body interaction with antennas and sensors.
Book Synopsis An Energy-efficient Wireless Data Link for Implantable Electronics by : Daniel Prashanth Kumar
Download or read book An Energy-efficient Wireless Data Link for Implantable Electronics written by Daniel Prashanth Kumar and published by . This book was released on 2009 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low-power wireless links are important for the development of long-term implantable neural prostheses. Furthermore, in implanted systems with many neural recording electrodes, the data rate of the wireless link will need to be quite high since each recording electrode can produce about 120 kbps of data. For low-power operation, inductively-coupled near-field wireless links have shown great promise and were used to develop a power-efficient data link for biomedical implants. A prototype bi-directional, half-duplex wireless link based on inductive coupling was designed in a 0.18 [mu]m process. The uplink (i.e. data transmission from the internal transceiver) was designed to use an impedance modulation strategy. Since this technique only requires a single local oscillator (LO) in the external transceiver, the energy expenditure of the implanted transceiver is minimized. Simulated uplink data transfer rates of up to 10 Mbps has been shown. A PWM based ASK coding strategy was used for the downlink (i.e. data transmission to the implanted device). The downlink is able to achieve a data transfer rate of up to 1.5 Mbps. A technique to reduce BER of inductive coupling links due to pulse-width distortion effects by pre-distorting the transmitted data is also presented. A calibration technique to reduce the resonant frequency mismatch between the two magnetically coupled resonators is also shown.
