Transceiver Technologies For Millimeter Wave Beam Steering Applications Band 71

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Transceiver Technologies For Millimeter Wave Beam Steering Applications Band 71

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Author : Yi-Fan Tsao
language : en
Publisher: Cuvillier Verlag
Release Date : 2022-11-08

Transceiver Technologies For Millimeter Wave Beam Steering Applications Band 71 written by Yi-Fan Tsao and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-11-08 with Technology & Engineering categories.

During the past years, wireless communication systems have been rapidly advancing to meet the high data-rate requirements of various emerging applications. However, the existing transceivers have typically been demonstrated using CMOS-compatible technologies that deliver a relatively low equivalent isotropic radiated power in a small unit cell. Moreover, the particular device characteristics are limiting the linear region for operation. Therefore, the main focus of this dissertation is to present and discuss new design methods for transceivers to solve these issues. To reduce the complexity of the transceiver module for further phased-array scaling, a low-noise power amplifier design approach is designed using a 0.15-μm GaN-on-SiC high-electron mobility transistor technology (HEMT). Utilizing a traded off interstage matching topology between loss and bandwidth, the conversion loss induced by the matching network could be effectively reduced. A stacked-FET configuration was adopted to enhance the power handling of the RF switch. Further improvement on the isolation bandwidth was investigated using theoretical analysis on the intrinsic effect of the passive HEMTs. With the successful implementation of the RF front-end circuits, transceiver modules were integrated on Rogers RO3010 substrate. The planar dual exponentially tapered slot antenna phased-array system showed a compact size with simple biasing network compared to the conventional transceiver approach. The presented T/R module was characterized with an over-the-air test at a distance of 1 m, overcoming the free space path loss of 64 dB. It also shows a high flexibility for further integration with a larger number of array systems, which is very promising for future 5G communication systems.

Short Channel Gan Fet Mmic Technology For High Reliability Applications Band 74

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Author : Konstantin Osipov
language : en
Publisher: Cuvillier Verlag
Release Date : 2024-02-07

Short Channel Gan Fet Mmic Technology For High Reliability Applications Band 74 written by Konstantin Osipov and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-02-07 with categories.

Nowdays GaN HEMT technology reached maturity level that allows industral fabrication of such devices for wide range of civil (telecommunications, power electrinics, automotive etc.), as well as space and military (phased array radars) applications. At this level, technology start reaching physical limits of GaN material and require new approaches that will allow to overcome some of well known problems related to GaN HEMTs, such as high gate leakage currents, reliability issues and difficulties of normally-off transistor fabrication. The goal of these theses is theoretical and experimental confirmation of the idea, that using peizoelectric nature of GaN crystal will allow local modification of GaN HEMT channel by means of external mechanical stress (using first and second passivation layers as stressors). After implementation of the proposed technology changes and new device geometry in process flow intended for 150 nm GaN HEMTMMIC fabrication, E/D devices with pinch-off voltages +0.1V and -1.65V respectively were fabricated on the same wafer within single process flow. It was observed, that E-mode devices, fabricated using compressed passivation layers, demonstrate lower gate leakage currents and more robust in HTRB test as compared to D-mode devices. In summary, it was demonstrated, that it is possible to control pinch-off voltage and gate leakage current of short channel GaN HEMTs by application of external stress. Usage of external stress, opens new degree of freedom in device optimization, and extends opportunities for more advanced MMIC design.

Millimeter Wave Communication Systems

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Author : Kao-Cheng Huang
language : en
Publisher: John Wiley & Sons
Release Date : 2011-04-20

Millimeter Wave Communication Systems written by Kao-Cheng Huang and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-04-20 with Technology & Engineering categories.

The aim of this book is to present the modern design and analysis principles of millimeter-wave communication system for wireless devices and to give postgraduates and system professionals the design insights and challenges when integrating millimeter wave personal communication system. Millimeter wave communication system are going to play key roles in modern gigabit wireless communication area as millimeter-wave industrial standards from IEEE, European Computer Manufacturing Association (ECMA) and Wireless High Definition (Wireless HD) Group, are on their way to the market. The book will review up-to-date research results and utilize numerous design and analysis for the whole system covering from Millimeter wave frontend to digital signal processing in order to address major topics in a high speed wireless system. This book emphasizes the importance and the requirements of high-gain antennas, low power transceiver, adaptive equalizer/modulation, channeling coding and adaptive multi-user detection for gigabit wireless communications. In addition, the book will include the updated research literature and patents in the topics of transceivers, antennas, MIMO, channel capacity, coding, equalizer, Modem and multi-user detection. Finally the application of these antennas will be discussed in light of different forthcoming wireless standards at V-band and E-band.

Untersuchung Der Degradation Von Inalgan Basierten Ultravioletten Leuchtdioden Zur Verbesserung Der Zuverl Ssigkeit Band 79

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Author : Johannes Glaab
language : de
Publisher: Cuvillier Verlag
Release Date : 2025-06-20

Untersuchung Der Degradation Von Inalgan Basierten Ultravioletten Leuchtdioden Zur Verbesserung Der Zuverl Ssigkeit Band 79 written by Johannes Glaab and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-06-20 with categories.

Diese Arbeit untersucht das betriebsinduzierte Degradationsverhalten von InAlGaN-basierten UV-C und UV-B LEDs. Durch Analyse des zeitlichen Verlaufs von elektroopti-schen Parametern, wie beispielsweise optische Leistung und Betriebsspannung, sowie Materialanalytischen Messungen konnten drei Degradationsmechanismen identifiziert werden, welche zu einer Reduktion der optischen Leistung der LEDs führen: Die Aktivie-rung von Magnesium-Wasserstoff-Komplexen, die Bildung von Punktdefekten in der akti-ven Zone, sowie die Diffusion von Punktdefekten in die aktive Zone. Optimierungen der Heterostruktur, des p-Dotierprofil und der Elektronenblockierschicht verbesserten die Lochinjektion und strahlende Rekombination, wodurch die initiale Leistung erhöht und die Lebensdauer der LEDs deutlich gesteigert werden konnte.

Design Und Realisierung Gan Hemt Basierter Thz Detektoren Band 72

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Author : Adam Rämer
language : de
Publisher: Cuvillier Verlag
Release Date : 2023-03-23

Design Und Realisierung Gan Hemt Basierter Thz Detektoren Band 72 written by Adam Rämer and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-03-23 with Technology & Engineering categories.

In dieser Arbeit wird gezeigt, wie State-of-the-Art THz-Detektoren mittels eines niederfrequenten Standard MMIC Prozesses zu realisieren sind. Für den zugrundeliegenden Detektionsmechanismus wird die theoretische Grundlage hergeleitet und herausgearbeitet, wie die einzelnen Elemente des Detektors interagieren. Die THz-Detektoren sind in einem GaN-on-SiC-HEMT-MMIC-Prozess realisiert. Dabei werden Bow-Tie-Antennen, logarithmische Spiralantennen und die jeweilige komplementäre Schlitz-Antennenkonfiguration miteinander verglichen. In diesem Zusammenhang wurde ein neuartiges Design entworfen, welches in Japan, den USA und der Europäischen Union erfolgreich zum Patent angemeldet ist. Die gesamte Detektorstruktur wird durch Simulationen und Gegenüberstellungen von Messungen an gefertigten THz-Detektorstrukturen verifiziert. Im Vergleich zwischen den simulierten und den gemessenen Detektionsströmen zeigt sich, trotz noch vorhandener Unsicherheiten bei Messung und Modell, über der Frequenz von 0,1 THz bis 1,2 THz eine gute Übereinstimmung. Die Kombination einer mittels 3D-EM-Simulationen nachgebildeten passiven Antennenstruktur mit einem den inneren Transistor beschreibenden Modell zu einer Gesamtsimulation der Detektorstruktur ist ein fundamentaler Bestandteil dieser Arbeit. Die realisierten THz-Detektorstrukturen mit teils neuartigen Antennen sind bei Raumtemperatur besonders empfindlich und stellen den aktuellen Entwicklungstand von GaN-basierten THz-Detektoren dar. Der Hauptdetektionsmechanismus liegt dabei im resistiven Selbstmischen, wodurch die Detektoren ein instantanes Ansprechverhalten bei hoher Linearität besitzen.

Microstrip And Printed Antennas

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Author : Debatosh Guha
language : en
Publisher: John Wiley & Sons
Release Date : 2011-02-02

Microstrip And Printed Antennas written by Debatosh Guha and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-02-02 with Technology & Engineering categories.

This book focuses on new techniques, analysis, applications and future trends of microstrip and printed antenna technologies, with particular emphasis to recent advances from the last decade Attention is given to fundamental concepts and techniques, their practical applications and the future scope of developments. Several topics, essayed as individual chapters include reconfigurable antenna, ultra-wideband (UWB) antenna, reflectarrays, antennas for RFID systems and also those for body area networks. Also included are antennas using metamaterials and defected ground structures (DGSs). Essential aspects including advanced design, analysis and optimization techniques based on the recent developments have also been addressed. Key Features: Addresses emerging hot topics of research and applications in microstrip and printed antennas Considers the fundamental concepts, techniques, applications and future scope of such technologies Discusses modern applications such as wireless base station to mobile handset, satellite earth station to airborne communication systems, radio frequency identification (RFID) to body area networks, etc. Contributions from highly regarded experts and pioneers from the US, Europe and Asia This book provides a reference for R&D researchers, professors, practicing engineers, and scientists working in these fields. Graduate students studying/working on related subjects will find this book as a comprehensive literature for understanding the present and future trends in microstrip and printed antennas.

International Conference On Millimeter And Submillimeter Waves And Applications

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Author : Mohammed N. Afsar
language : en
Publisher:
Release Date : 1994

International Conference On Millimeter And Submillimeter Waves And Applications written by Mohammed N. Afsar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Science categories.

Millimeter Wave Wireless Communications

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Author : Theodore S. Rappaport
language : en
Publisher: Pearson Education
Release Date : 2015

Millimeter Wave Wireless Communications written by Theodore S. Rappaport and has been published by Pearson Education this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Computers categories.

The Definitive, Comprehensive Guide to Cutting-Edge Millimeter Wave Wireless Design “This is a great book on mmWave systems that covers many aspects of the technology targeted for beginners all the way to the advanced users. The authors are some of the most credible scholars I know of who are well respected by the industry. I highly recommend studying this book in detail.” —Ali Sadri, Ph.D., Sr. Director, Intel Corporation, MCG mmWave Standards and Advanced Technologies Millimeter wave (mmWave) is today's breakthrough frontier for emerging wireless mobile cellular networks, wireless local area networks, personal area networks, and vehicular communications. In the near future, mmWave products, systems, theories, and devices will come together to deliver mobile data rates thousands of times faster than today's existing cellular and WiFi networks. In Millimeter Wave Wireless Communications, four of the field's pioneers draw on their immense experience as researchers, entrepreneurs, inventors, and consultants, empowering engineers at all levels to succeed with mmWave. They deliver exceptionally clear and useful guidance for newcomers, as well as the first complete desk reference for design experts. The authors explain mmWave signal propagation, mmWave circuit design, antenna designs, communication theory, and current standards (including IEEE 802.15.3c, Wireless HD, and ECMA/WiMedia). They cover comprehensive mmWave wireless design issues, for 60 GHz and other mmWave bands, from channel to antenna to receiver, introducing emerging design techniques that will be invaluable for research engineers in both industry and academia. Topics include Fundamentals: communication theory, channel propagation, circuits, antennas, architectures, capabilities, and applications Digital communication: baseband signal/channel models, modulation, equalization, error control coding, multiple input multiple output (MIMO) principles, and hardware architectures Radio wave propagation characteristics: indoor and outdoor applications Antennas/antenna arrays, including on-chip and in-package antennas, fabrication, and packaging Analog circuit design: mmWave transistors, fabrication, and transceiver design approaches Baseband circuit design: multi–gigabit-per-second, high-fidelity DAC and ADC converters Physical layer: algorithmic choices, design considerations, and impairment solutions; and how to overcome clipping, quantization, and nonlinearity Higher-layer design: beam adaptation protocols, relaying, multimedia transmission, and multiband considerations 60 GHz standardization: IEEE 802.15.3c for WPAN, Wireless HD, ECMA-387, IEEE 802.11ad, Wireless Gigabit Alliance (WiGig)

Innovation In Electrical Power Engineering Communication And Computing Technology

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Author : Manohar Mishra
language : en
Publisher: Springer Nature
Release Date : 2021-12-15

Innovation In Electrical Power Engineering Communication And Computing Technology written by Manohar Mishra and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-12-15 with Technology & Engineering categories.

This book features selected high-quality papers from the Second International Conference on Innovation in Electrical Power Engineering, Communication, and Computing Technology (IEPCCT 2021), held at Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar, India, on 24–26 September 2021. Presenting innovations in power, communication, and computing, it covers topics such as mini, micro, smart and future power grids; power system economics; energy storage systems; intelligent control; power converters; improving power quality; signal processing; sensors and actuators; image/video processing; high-performance data mining algorithms; advances in deep learning; and optimization methods.

Wiley 5g Ref

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Author : Rahim Tafazolli
language : en
Publisher: Wiley-Blackwell
Release Date : 2019-10-31

Wiley 5g Ref written by Rahim Tafazolli and has been published by Wiley-Blackwell this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-31 with 5G mobile communication systems categories.

Wiley 5G Ref: The Essential 5G reference Online is a large-scale, fully comprehensive, twice-yearly updating digital reference, planned for release in 2020 to coincide with commercial deployment of 5G. This essential resource maps out a solid vision of emerging technologies widely foreseen to be adopted by 5G mobile systems, based on current business trends, proven technologies, and the latest international research. Wiley 5G Ref offers a user-friendly format that provides the user with article-level, in-depth technical surveys on all aspects of 5G solutions, architectures, technologies and standards for researchers, practitioners and students in information and communication engineering, computer science and engineering, and telecommunication networking.