Download or read book Tunnel Diodes and Tunnel Junction Devices for High Frequency High Power Operation written by GENERAL ELECTRIC CO SYRACUSE N Y. and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of tunnel diodes for us as scillators capable of mW output at frequencies up to 3 kmc is described. Inestigations on the failure of gallium arsenide units were made with no conclusive result. Experiments with different types of alrt to reduce the junction capacitance in germanium tunnel diodes. A low inductance - low capacitance modified stripline package was developed. The operation of oscillators using high current tunnel diodes above their self resonant frequency is presented. General stability conditions of the tunnel (lumped and distributed) are discussed. Based on a non-linear analysis of a tunnel diode oscillator, the power generated by the diode, the power dissipated within the diode, and the power delivered to an external load are calculated as a function of frequency and loading conditions. (Author).

Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 1416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1961-04 with total page 1746 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book MICROWAVE SEMICONDUCTOR DEVICES written by SITESH KUMAR ROY and published by PHI Learning Pvt. Ltd.. This book was released on 2003-01-01 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this comprehensive text is to introduce the students the physics and the operational principles as well as the characteristics, and applications of the microwave semiconductor devices. These devices are making a revolutionary change in the field of communication and radars. As a result of the accelerating rate of growth of microwave technology in research and industry, students, engineers and scientists need to understand the theoretical and experimental design and analysis of these devices. The book also deals with higher frequency microwaves called millimeter waves, which are finding wide applications in ground and satellite communication, radars and missile guidance. Millimeter wave system development is one of the most advanced technologies in radio science, especially in view of the ever increasing demand of communication and saturation of microwave frequency range with increasing number of channels. The book discusses in greater detail about the semiconductor devices such as IMPATT diodes, Gunn diodes, HEMT diodes and FET diodes. It emphasizes on various two and three terminal devices in the microwave and millimeter wave field based on silicon and Groups III-V compound semiconductors. The book is intended to serve as a textbook for undergraduate electronics and electrical engineering students and postgraduate students of physics. It would also be a valuable reference book for professional engineers and physicists.

Download or read book Advanced Semiconducting Materials and Devices written by K.M. Gupta and published by Springer. This book was released on 2015-08-20 with total page 595 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest developments in semiconducting materials and devices, providing up-to-date information on the science, processes, and applications in the field. A wide range of topics are covered, including optoelectronic devices, metal–semiconductor junctions, heterojunctions, MISFETs, LEDs, semiconductor lasers, photodiodes, switching diodes, tunnel diodes, Gunn diodes, solar cells, varactor diodes, IMPATT diodes, and advanced semiconductors. Detailed attention is paid to advanced and futuristic materials. In addition, clear explanations are provided of, for example, electron theories, high-field effects, the Hall effect, transit-time effects, drift and diffusion, breakdown mechanisms, equilibrium and transient conditions, switching, and biasing. The book is designed to meet the needs of undergraduate engineering students and will also be very useful for postgraduate students; it will assist in preparation for examinations at colleges and universities and for other examinations in engineering. Practice questions are therefore presented in both essay and multiple choice format, and many solved examples and unsolved problems are included.

Download or read book High Efficiency Tunnel Junctions for Use in Tunnel Junction enabled III Nitride Optoelectronics written by Zane Jamal-Eddine and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the design and demonstration of high efficiency III-Nitride tunnel junctions for applications in tunnel junction-enabled III-nitride optoelectronic devices. The tunnel junctions are then utilized to study multi-junction cascaded LED structures for high output power applications. GaN light emitting diodes have been extremely successful in their applications for highly efficient solid-state lighting. There is still great interest in high power density III-Nitride visible emitters that could enable several new applications and reduce the cost associated with domestic, industrial, and automotive lighting. However, the drop in efficiency at high power/current density (known as the efficiency droop problem) makes it challenging to achieve high power density LEDs. The efficiency droop problem is one of the key unsolved issues for visible GaN LEDs, but multi-active region LEDs, consisting of identical active PN junctions and tunnel junctions (TJ), can provide an elegant solution to circumvent this challenge and enable high power emitters which operate at low current density, where efficiency droop is not as significant. First, a theoretical model was developed through TCAD simulations that offers a physics-based approach to understanding the key components of the design space which lead to a more efficient tunnel junction. Next, a sidewall activation process was optimized for buried magnesium-doped p-GaN layers yielding a significant reduction in tunnel junction-enabled LED forward voltage. This buried activation enabled the study of tunnel junctions grown by MOCVD without growth interruptions. These MOCVD-grown tunnel junctions were optimized for minimization of the tunnel junction voltage drop. Two device structures were studied, an all-GaN homojunction tunnel junction, and a graded InGaN heterojunction-based tunnel junction. This work reports a record-low voltage drop in the graded-InGaN heterojunction based tunnel junction device structure achieving a de-embedded tunnel junction voltage drop of 0.17 V at 100 A/cm2, and 0.45V at 100A/cm2 for the GaN homojunction tunnel junction. The GaN homojunction was used in the realization of cascaded blue LEDs with fully transparent GaN homojunction tunnel junctions (TJs). Ultra-low voltage drop graded InGaN tunnel junctions were utilized to enable multi-active region blue LEDs with up to 3 active regions in a single device. Voltage scaling that follows the number of junctions was observed along with external quantum efficiency scaling close to the number of junctions. This work demonstrates that with proper tunnel junction design, it is possible to achieve near ideal voltage and EQE scaling in multi-junction cascaded LEDs which can enable improvements in wall-plug efficiency at high output power operation.

Download or read book High Frequency Circuit Applications of Resonant Tunneling Diodes written by Scott K. Diamond and published by . This book was released on 1990 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 2024 25 RRB JE Stage II Electronics Allied Engineering Solved Papers written by YCT Expert Team and published by YOUTH COMPETITION TIMES. This book was released on with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2024-25 RRB JE Stage-II Electronics & Allied Engineering Solved Papers

Download or read book Comprehensive Semiconductor Science and Technology written by and published by Newnes. This book was released on 2011-01-28 with total page 3572 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductors are at the heart of modern living. Almost everything we do, be it work, travel, communication, or entertainment, all depend on some feature of semiconductor technology. Comprehensive Semiconductor Science and Technology, Six Volume Set captures the breadth of this important field, and presents it in a single source to the large audience who study, make, and exploit semiconductors. Previous attempts at this achievement have been abbreviated, and have omitted important topics. Written and Edited by a truly international team of experts, this work delivers an objective yet cohesive global review of the semiconductor world. The work is divided into three sections. The first section is concerned with the fundamental physics of semiconductors, showing how the electronic features and the lattice dynamics change drastically when systems vary from bulk to a low-dimensional structure and further to a nanometer size. Throughout this section there is an emphasis on the full understanding of the underlying physics. The second section deals largely with the transformation of the conceptual framework of solid state physics into devices and systems which require the growth of extremely high purity, nearly defect-free bulk and epitaxial materials. The last section is devoted to exploitation of the knowledge described in the previous sections to highlight the spectrum of devices we see all around us. Provides a comprehensive global picture of the semiconductor world Each of the work's three sections presents a complete description of one aspect of the whole Written and Edited by a truly international team of experts

Download or read book Microwave Engineering written by David M. Pozar and published by John Wiley & Sons. This book was released on 2011-11-22 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pozar's new edition of Microwave Engineering includes more material on active circuits, noise, nonlinear effects, and wireless systems. Chapters on noise and nonlinear distortion, and active devices have been added along with the coverage of noise and more material on intermodulation distortion and related nonlinear effects. On active devices, there's more updated material on bipolar junction and field effect transistors. New and updated material on wireless communications systems, including link budget, link margin, digital modulation methods, and bit error rates is also part of the new edition. Other new material includes a section on transients on transmission lines, the theory of power waves, a discussion of higher order modes and frequency effects for microstrip line, and a discussion of how to determine unloaded.

Download or read book U S Government Research Development Reports written by and published by . This book was released on 1967 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Basic Electronics written by United States. Bureau of Naval Personnel and published by . This book was released on 2004 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book MICROWAVE DEVICES AND CIRCUIT DESIGN written by GANESH PRASAD SRIVASTAVA and published by PHI Learning Pvt. Ltd.. This book was released on 2006-01-01 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook presents a unified treatment of theory, analysis and design of microwave devices and circuits. It is designed to address the needs of undergraduate students of electronics and communi-cation engineering for a course in microwave engineering as well as those of the students pursuing M.Sc. courses in electronics science. The main objective is to provide students with a thorough under-standing of microwave devices and circuits, and to acquaint them with some of the methods used in circuit analysis and design. Several types of planar transmission lines such as stripline, microstrip, slot line and a few other structures have been explained. The important concepts of scattering matrix and Smith chart related to design problems have been discussed in detail. The performance and geometry of microwave transistors-both bipolar and field effect-have been analysed. Microwave passive components such as couplers, power dividers, attenuators, phase shifters and circulators have been comprehensively dealt with. Finally, the analysis and design aspects of microwave transistor amplifiers and oscillators are presented using the scattering parameters technique. Numerous solved problems and chapter-end questions are included for practice and reinforcement of the concepts.

Download or read book Practical Microwave Electron Devices written by Bozzano G Luisa and published by Academic Press. This book was released on 2013-10-22 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: Practical Microwave Electron Devices provides an understanding of microwave electron devices and their applications. All areas of microwave electron devices are covered. These include microwave solid-state devices, including popular microwave transistors and both passive and active diodes; quantum electron devices; thermionic devices (including relativistic thermionic devices); and ferrimagnetic electron devices. The design of each of these devices is discussed as well as their applications, including oscillation, amplification, switching, modulation, demodulation, and parametric interactions. Numerous design examples and case studies are presented throughout the book. For each microwave electron device covered, typical design examples or case studies are presented as well as qualitative or quantitative explanations. The fundamental theory of each device is summarized along with the underlying principles of the design. Each summary is presented so that the design techniques can be applied to other specific cases, designs, and applications. Review questions are included with each chapter to stimulate creative thinking and enhance the acquisition of knowledge and design skills. This book is written for engineers, scientists, and technicians seeking practical knowledge on microwave electron devices and their applications through self-study. It is also suitable for use as a college textbook in upper-division courses for seniors and first-year graduate students in electrical engineering.

Download or read book Microwave Active Devices and Circuits for Communication written by Subhash Chandra Bera and published by Springer. This book was released on 2018-12-11 with total page 691 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book discusses active devices and circuits for microwave communications. It begins with the basics of device physics and then explores the design of microwave communication systems including analysis and the implementation of different circuits. In addition to classic topics in microwave active devices, such as p-i-n diodes, Schottky diodes, step recovery diodes, BJT, HBT, MESFET, HFET, and various microwave circuits like switch, phase shifter, attenuator, detector, amplifier, multiplier and mixer, the book also covers modern areas such as Class-F power amplifiers, direct frequency modulators, linearizers, and equalizers. Most of the examples are based on practical devices available in commercial markets and the circuits presented are operational. The book uses analytical methods to derive values of circuit components without the need for any circuit design tools, in order to explain the theory of the circuits. All the given analytical expressions are also cross verified using commercially available microwave circuit design tools, and each chapter includes relevant diagrams and solved problems. It is intended for scholars in the field of electronics and communication engineering.

Download or read book Microwave Passive Direction Finding written by Stephen E. Lipsky and published by SciTech Publishing. This book was released on 2004 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave Passive Direction Finding unifies direction finding (DF) theory and brings together into a single source wide-ranging information on the technology of measuring the direction-of-arrival of microwave signals. Throughout the material, there is authoritative information useful to preparing a detailed technical proposal for new business that has been compiled from many years of defense industry presentations, reports, and systems development. Diagrams and photographs of state-of-the-art equipment depict the methods discussed, and equations and charts facilitate a "hands-on" approach to calculating system performance. The book also presents rarely published systems concepts, such as digital preprocessing, supercommutation, and wide RF bandwidth signal detection methods. Specific sections cover evolution and use of monopulse passive DF receiver theory, design of antenna elements for conformal DF coverage, receiver configurations, DF antenna arrays, interferometer DF techniques, computation methods for signal detection, probability of detection, accuracy of DF systems, and signal processing and display methods. More than any book on this technology, Microwave Passive Direction Finding anticipates the questions that arise in the DF design process. The chapters are organized to stand alone, making the book useful as a text/reference for the practicing engineer. At the same time, the material is organized inductively, so that it can be used for a college or seminar text.