Wireless Power Transfer For Scaled Electronic Biomedical Implants

Download Wireless Power Transfer For Scaled Electronic Biomedical Implants full books in PDF, epub, and Kindle. Read online Wireless Power Transfer For Scaled Electronic Biomedical Implants ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

Wireless Power Transfer for Scaled Electronic Biomedical Implants

Author : Paul Thomas Theilmann
Publisher :
ISBN 13 : 9781267324443
Total Pages : 324 pages
Book Rating : 4.3/5 (244 download)

DOWNLOAD NOW!

Book Synopsis Wireless Power Transfer for Scaled Electronic Biomedical Implants by : Paul Thomas Theilmann

Download or read book Wireless Power Transfer for Scaled Electronic Biomedical Implants written by Paul Thomas Theilmann and published by . This book was released on 2012 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decreasing the physical size of electronic biomedical implants is an important objective in that it increases the number of realizable applications. For example, wireless pacemakers can be on the order of an inch in diameter while retinal and cochlear implants must be scaled to a centimeter to fit in their respective locations within the body. Perhaps the ultimate goal is devices that are no larger than a red blood cell, approximately five microns in diameter. At those dimensions devices reach compatibility with the circulatory system and can be injected into the blood stream. The chief impediment to such aggressive size reduction is the power supply. In this dissertation the use of electromagnetic (EM) radiation to wirelessly power miniature biomedical implants is investigated. Both inductive coupling using time varying magnetic fields and near-infrared (NIR) light collected by photodiodes are identified as viable solutions for transcutaneous power transmission. Minimum device size is limited by power radiation density at the implant and the efficiency with which the device can collect, convert and use this energy. Power density at the implant is restricted by safety regulations and tissue attenuation. Both are studied in this work, the results of which are used to build analytical models for power calculations. The use of ferrite rods in inductive implants can improve power transfer efficiency. In this work an analytical model is derived and supported experimentally which shows that mutual inductance can be improved by as much as a factor of 10 when NiZn ferrite rods are used within the implanted device. This improves efficiency and permits decreased implant size. Efficiently converting time-varying energy to usable DC power is essential for obtaining high implant efficiency. In this work a silicon-on-sapphire (SOS) CMOS rectifier that overcomes the dead-zone at low power characteristics of conventional rectifiers is developed. The design produces the targeted output power of 1 & mu;W with a peak power conversion efficiency of 67% at 100MHz. Furthermore the rectifier achieves greater than 30% efficiency for input power levels as low as -40dBm. A larger rectifier designed with the same topology is used as part of an inductive power transfer system, which is able to illuminate an LED at distances greater than 5cm with input power levels to the primary coil of only 1W. For NIR light power transfer, a specialized photodiode designed using a fully depleted silicon on insulator CMOS process was demonstrated to collect ~35[mu]W of power from a 90mW laser. The insights gained from this work are used to predict the size scaling limits of implants powered using wireless techniques. It is estimated that to obtain 1 & mu;W of power within the implant, inductive supplies will require a secondary coil radius of ~15[mu]m while photodiodes for NIR light power collection will require radii of at least ~40[mu]m.

Wireless Power Transfer for Miniature Implantable Biomedical Devices

Author : Mingui Sun
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)

DOWNLOAD NOW!

Book Synopsis Wireless Power Transfer for Miniature Implantable Biomedical Devices by : Mingui Sun

Download or read book Wireless Power Transfer for Miniature Implantable Biomedical Devices written by Mingui Sun and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Miniature implantable electronic devices play increasing roles in modern medicine. In order to implement these devices successfully, the wireless power transfer (WPT) technology is often utilized because it provides an alternative to the battery as the energy source; reduces the size of implant substantially; allows the implant to be placed in a restricted space within the body; reduces both medical cost and chances of complications; and eliminates repeated surgeries for battery replacements. In this work, we present our recent studies on WPT for miniature implants. First, a new implantable coil with a double helix winding is developed which adapts to tubularly shaped organs within the human body, such as blood vessels and nerves. This coil can be made in the planar form and then wrapped around the tubular organ, greatly simplifying the surgical procedure for device implantation. Second, in order to support a variety of experiments (e.g., drug evaluation) using a rodent animal model, we present a special WPT transceiver system with a relatively large power transmitter and a miniature implantable power receiver. We present a multi-coil design that allows steady power transfer from the floor of an animal cage to the bodies of a group of free-moving laboratory rodents.

Compact Size Wireless Power Transfer Using Defected Ground Structures

Author : Sherif Hekal
Publisher : Springer
ISBN 13 : 9811380473
Total Pages : 91 pages
Book Rating : 4.8/5 (113 download)

DOWNLOAD NOW!

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.

Inductive Links for Wireless Power Transfer

Author : Pablo Pérez-Nicoli
Publisher : Springer Nature
ISBN 13 : 303065477X
Total Pages : 230 pages
Book Rating : 4.0/5 (36 download)

DOWNLOAD NOW!

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.

Wireless Power Transfer

Author : Johnson I. Agbinya
Publisher : CRC Press
ISBN 13 : 1000793338
Total Pages : 767 pages
Book Rating : 4.0/5 (7 download)

DOWNLOAD NOW!

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.

Wireless Power Transfer

Author : Johnson I. Agbinya
Publisher : CRC Press
ISBN 13 : 1000793095
Total Pages : 415 pages
Book Rating : 4.0/5 (7 download)

DOWNLOAD NOW!

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 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nikola Tesla's 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 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.

Wireless Power Transfer for Medical Microsystems

Author : Tianjia Sun
Publisher : Springer
ISBN 13 : 9781461477013
Total Pages : 0 pages
Book Rating : 4.4/5 (77 download)

DOWNLOAD NOW!

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.

Coil Misalignment Compensation Techniques for Wireless Power Transfer Links in Biomedical Implants

Author : Fanpeng Kong
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (936 download)

DOWNLOAD NOW!

Book Synopsis Coil Misalignment Compensation Techniques for Wireless Power Transfer Links in Biomedical Implants by : Fanpeng Kong

Download or read book Coil Misalignment Compensation Techniques for Wireless Power Transfer Links in Biomedical Implants written by Fanpeng Kong and published by . This book was released on 2015 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless power Transfer (WPT) technique, based on inductive links, has been admit- ted as a promising solution for powering biomedical implants. Ensuring a stable power delivery via inductive links in implants under all conditions, however, has been a chal- lenging design problem. One of the issues that negatively impacts the performance of wireless power transfer (WPT) links in implants, is the misalignment in the posi- tion of the transmitter and receiver coils, which could naturally occur as a result of body movement or changes in the biological environment. An immediate e ect of coil misalignment is the change in coupling factor, resulting in the reduction of the power delivered to the load at the receiver side. In this work, we present a design concept that could be employed on the transmitter side to mitigate this e ect while keeping the driver to work at its optimum operating condition. Speci cally, we will demonstrate, analytically and through simulations, that tuning the shunt capacitor and the supply voltage at the transmitter side could be a promising approach for compensating the performance degradation induced by coil misalignment in WPT links.

Antenna and Sensor Technologies in Modern Medical Applications

Author : Yahya Rahmat-Samii
Publisher : John Wiley & Sons
ISBN 13 : 1119683297
Total Pages : 624 pages
Book Rating : 4.1/5 (196 download)

DOWNLOAD NOW!

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.

Inductive Powering

Author : Koenraad van Schuylenbergh
Publisher : Springer Science & Business Media
ISBN 13 : 9048124123
Total Pages : 223 pages
Book Rating : 4.0/5 (481 download)

DOWNLOAD NOW!

Book Synopsis Inductive Powering by : Koenraad van Schuylenbergh

Download or read book Inductive Powering written by Koenraad van Schuylenbergh and published by Springer Science & Business Media. This book was released on 2009-05-31 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inductive powering has been a reliable and simple method for many years to wirelessly power devices over relatively short distances, from a few centimetres to a few feet. Examples are found in biomedical applications, such as cochlear implants; in RFID, such as smart cards for building access control; and in consumer devices, such as electrical toothbrushes. Device sizes shrunk considerably the past decades, demanding accurate design tools to obtain reliable link operation in demanding environments. With smaller coil sizes, the link efficiency drops dramatically to a point where the commonly used calculation methods become invalid. Inductive Powering: Basic Theory and Application to Biomedical Systems lists all design equations and topology alternatives to successfully build an inductive power and data link for your specific application. It also contains practical guidelines to expand the external driver with a servomechanism that automatically tunes itself to varying coupling and load conditions.

Circuit Design Considerations for Implantable Devices

Author : Peng Cong
Publisher : CRC Press
ISBN 13 : 100079461X
Total Pages : 210 pages
Book Rating : 4.0/5 (7 download)

DOWNLOAD NOW!

Book Synopsis Circuit Design Considerations for Implantable Devices by : Peng Cong

Download or read book Circuit Design Considerations for Implantable Devices written by Peng Cong and published by CRC Press. This book was released on 2022-09-01 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Implantable devices are a unique area for circuit designers. A comprehensive understanding of design trade-offs at the system level is important to ensure device success. Circuit Design Considerations for Implantable Devices provides knowledge to CMOS circuit designers with limited biomedical background to understand design challenges and trade-offs for implantable devices, especially neural interfacing.Technical topics discussed in the book include: Neural interface  Neural sensing amplifiers  Electrical stimulation  Embedded Signal Analysis Wireless Power Transmission to mm-Sized Free-Floating Distributed Implants Next Generation Neural Interface Electronics

Wireless Power Technologies for Implantable Medical Devices

Author : Hadi Heidari
Publisher : Springer
ISBN 13 : 9783031528330
Total Pages : 0 pages
Book Rating : 4.5/5 (283 download)

DOWNLOAD NOW!

Book Synopsis Wireless Power Technologies for Implantable Medical Devices by : Hadi Heidari

Download or read book Wireless Power Technologies for Implantable Medical Devices written by Hadi Heidari and published by Springer. This book was released on 2024-05-30 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will addresses the recent advances on range of wireless powering and energy harvesting techniques for different medical devices such as leadless pacemakers, smart stents, implantable brain devices, cardiovascular devices, etc.

Wireless Power Transfer

Author : Mohamed Zellagui
Publisher : BoD – Books on Demand
ISBN 13 : 1839688017
Total Pages : 176 pages
Book Rating : 4.8/5 (396 download)

DOWNLOAD NOW!

Book Synopsis Wireless Power Transfer by : Mohamed Zellagui

Download or read book Wireless Power Transfer written by Mohamed Zellagui and published by BoD – Books on Demand. This book was released on 2021-08-18 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless power transfer (WPT) is a promising technology used to transfer electric energy from a transmitter to a receiver wirelessly without wires through various methods and technologies using time-varying electric, magnetic, or electromagnetic fields. It is an attractive solution for many industrial applications due to its many benefits over wired connections. This book discusses the theory and practical aspects of WPT technology.

The Proceedings of 2023 International Conference on Wireless Power Transfer (ICWPT2023)

Author : Chunwei Cai
Publisher : Springer Nature
ISBN 13 : 981970877X
Total Pages : 736 pages
Book Rating : 4.8/5 (197 download)

DOWNLOAD NOW!

Book Synopsis The Proceedings of 2023 International Conference on Wireless Power Transfer (ICWPT2023) by : Chunwei Cai

Download or read book The Proceedings of 2023 International Conference on Wireless Power Transfer (ICWPT2023) written by Chunwei Cai and published by Springer Nature. This book was released on with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Wireless Power Transfer

Author : Zhen Zhang
Publisher : John Wiley & Sons
ISBN 13 : 1119654084
Total Pages : 404 pages
Book Rating : 4.1/5 (196 download)

DOWNLOAD NOW!

Book Synopsis Wireless Power Transfer by : Zhen Zhang

Download or read book Wireless Power Transfer written by Zhen Zhang and published by John Wiley & Sons. This book was released on 2022-11-29 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless Power Transfer Presents a detailed overview of multiple-objective wireless power transfer (WPT) technologies, including the latest research developments and emerging applications Wireless Power Transfer: Principles and Applications offers comprehensive coverage of all key aspects of wireless power transfer (WPT) technologies, including fundamental theory, intelligent control, configuration analysis, and emerging power electronics techniques. This unique resource is the first book of its kind to provide in-depth discussion of energy transmission control schemes with emphasis on omni-directional vector control, energy-encryption-based security control, demand-based optimal designs for transmitter, pickup, and self-resonance coils, multiple-objective power distribution, and maximum efficiency and power control under various conditions. In addition, this text: Presents the methodologies and approaches of emerging multiple-objective WPT technologies Discusses various applications for wireless charging techniques, including contactless power for electric vehicles, in-flight charging for unmanned aerial vehicles, and underwater wireless charging Covers both intermittent and continuous impedance matching methods for different classes of coils Features more than 400 high-quality illustrations and numerous figures and tables throughout Wireless Power Transfer: Principles and Applications is an invaluable technical reference for academic researchers and industry professionals in power and energy engineering, and an excellent textbook for postgraduate courses in relevant areas of industrial and electronic engineering.

Ultrasonic Wireless Power and Data Transmission to Miniaturized Biomedical Implants Using Phased Array

Author : Zeinab Kashani
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)

DOWNLOAD NOW!

Book Synopsis Ultrasonic Wireless Power and Data Transmission to Miniaturized Biomedical Implants Using Phased Array by : Zeinab Kashani

Download or read book Ultrasonic Wireless Power and Data Transmission to Miniaturized Biomedical Implants Using Phased Array written by Zeinab Kashani and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This PhD dissertation focuses on developing efficient ultrasonic (US) wireless power and data transfer technologies for biomedical implants with millimeter (mm) dimensions. An ultrasonically interrogated (power/data) system with an external US array for beam focusing and steering through US beamforming is proposed to enable gastric electrical-wave mapping for diagnosing and eventually treating gastrointestinal motility disorders. The dissertation is divided into five parts. In the first part, the theory, design, and characterization of a wireless power transfer (WPT) link using mm-sized receivers (Rx) and a phased array (as external transmitter) are discussed. For given constraints imposed by the application and fabrication, such as the load (RL) and focal/powering distance (F), the optimal geometries of a US phased array and Rx transducer, as well as the optimal operation frequency (fc) are found through an iterative design procedure to maximize the power transfer efficiency (PTE). An optimal figure of merit (FoM) related to the link's PTE is proposed to simplify the US array design. In measurements, a fabricated 16-element array driven by 100 V pulses at an optimal frequency generated a US beam with a pressure output of 0.8 MPa and delivered up to 6 mW to a 1 mm3 Rx with a PTE of 0.14%. In the second part of this dissertation, a comprehensive study of wireless power transmission using a 32-element phased array capable of beam focusing and steering up to 50 mm depth and ±60o angle is provided. The performance of the US WPT link using mm-sized US receivers with different geometries and dimensions, the effect of different types of errors in the delay profile of the beamforming system on the delivered power, and the feasibility and efficacy of implant's localization with pulse-delay measurements with limited number of elements are investigated. The WPT link performance is evaluated based on the delivered power (within FDA safety limits) to mm-sized receivers with different geometries and diameters. In the third part of this dissertation, optimal US pulse transmission is demonstrated that could be used for data transmission to/from millimeter-sized biomedical implants in general or the self-image-guided ultrasonic (SIG-US) WPT. In SIG-US WPT, short pulses are transmitted by the implant periodically. The relative delays in the received signal by each external transducer in an array are then used to guide the beamformer for optimal steering of the power beam towards the implant. The effect of number of transmitted pulses on the iv amplitude of the received signal is studied, which is vital for low-power robust transmission. Furthermore, an adaptive application-specific integrated circuit (ASIC) for closed-loop low-power (and robust) US pulse-based data transmission is presented. The number of transmitted US pulses is changed based on the received voltage at the external unit in the closed-loop system to improve robustness and minimize the power consumption of the data transmitter. The ASIC, designed and fabricated in a 0.35[mu]m standard CMOS process, includes power management, controller/pulse driver, and envelope detector units. The fourth part of this dissertation includes ASIC design for low-frequency, low-power, and low-noise amplifiers that will be used to record gastric slow-wave signals. Simulation results and some limited measurement results are provided. The fifth part of this dissertation includes measurement results for a dual-mode ultrasonic- magnetic approach for wireless power transmission and energy harvesting. This dual-mode approach has the potential to solve the problem of power reduction when implant is rotating and to deliver high power within FDA safety limit using two different modalities. The future steps for circuit/system design, development, and testing are outlined. This dissertation represents an important step towards an implantable fully wireless gastric system, interrogated with a dual-mode ultrasonic-magnetic link for wireless power/data transfer, which can have a broad impact in the fields of health monitoring, diagnosis, and therapy.

Frontiers of Engineering

Author : National Academy of Engineering
Publisher : National Academies Press
ISBN 13 : 0309466016
Total Pages : 141 pages
Book Rating : 4.3/5 (94 download)

DOWNLOAD NOW!

Book Synopsis Frontiers of Engineering by : National Academy of Engineering

Download or read book Frontiers of Engineering written by National Academy of Engineering and published by National Academies Press. This book was released on 2018-02-22 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents papers on the topics covered at the National Academy of Engineering's 2017 US Frontiers of Engineering Symposium. Every year the symposium brings together 100 outstanding young leaders in engineering to share their cutting-edge research and innovations in selected areas. The 2017 symposium was held September 25-27 at the United Technologies Research Center in East Hartford, Connecticut. The intent of this book is to convey the excitement of this unique meeting and to highlight innovative developments in engineering research and technical work.