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Author: Robert R. Romanofsky Publisher: BiblioGov ISBN: 9781289224486 Category : Languages : en Pages : 36
Book Description
While there are a myriad of applications for microwave phase shifters in instrumentation and metrology, power combining, amplifier linearization, and so on, the most prevalent use is in scanning phased-array antennas. And while this market continues to be dominated by military radar and tracking platforms, many commercial applications have emerged in the past decade or so. These new and potential applications span low-Earth-orbit (LEO) communications satellite constellations and collision warning radar, an aspect of the Intelligent Vehicle Highway System or Automated Highway System. In any case, the phase shifters represent a considerable portion of the overall antenna cost, with some estimates approaching 40 percent for receive arrays. Ferrite phase shifters continue to be the workhorse in military-phased arrays, and while there have been advances in thin film ferrite devices, the review of this device technology in the previous edition of this book is still highly relevant. This chapter will focus on three types of phase shifters that have matured in the past decade: GaAs MESFET monolithic microwave integrated circuit (MMIC), micro-electromechanical systems (MEMS), and thin film ferroelectric-based devices. A brief review of some novel devices including thin film ferrite phase shifters and superconducting switches for phase shifter applications will be provided. Finally, the effects of modulo 2 phase shift limitations, phase errors, and transient response on bit error rate degradation will be considered.
Author: Robert R. Romanofsky Publisher: BiblioGov ISBN: 9781289224486 Category : Languages : en Pages : 36
Book Description
While there are a myriad of applications for microwave phase shifters in instrumentation and metrology, power combining, amplifier linearization, and so on, the most prevalent use is in scanning phased-array antennas. And while this market continues to be dominated by military radar and tracking platforms, many commercial applications have emerged in the past decade or so. These new and potential applications span low-Earth-orbit (LEO) communications satellite constellations and collision warning radar, an aspect of the Intelligent Vehicle Highway System or Automated Highway System. In any case, the phase shifters represent a considerable portion of the overall antenna cost, with some estimates approaching 40 percent for receive arrays. Ferrite phase shifters continue to be the workhorse in military-phased arrays, and while there have been advances in thin film ferrite devices, the review of this device technology in the previous edition of this book is still highly relevant. This chapter will focus on three types of phase shifters that have matured in the past decade: GaAs MESFET monolithic microwave integrated circuit (MMIC), micro-electromechanical systems (MEMS), and thin film ferroelectric-based devices. A brief review of some novel devices including thin film ferrite phase shifters and superconducting switches for phase shifter applications will be provided. Finally, the effects of modulo 2 phase shift limitations, phase errors, and transient response on bit error rate degradation will be considered.
Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781719372336 Category : Languages : en Pages : 30
Book Description
While there are a myriad of applications for microwave phase shifters in instrumentation and metrology, power combining, amplifier linearization, and so on, the most prevalent use is in scanning phased-array antennas. And while this market continues to be dominated by military radar and tracking platforms, many commercial applications have emerged in the past decade or so. These new and potential applications span low-Earth-orbit (LEO) communications satellite constellations and collision warning radar, an aspect of the Intelligent Vehicle Highway System or Automated Highway System. In any case, the phase shifters represent a considerable portion of the overall antenna cost, with some estimates approaching 40 percent for receive arrays. Ferrite phase shifters continue to be the workhorse in military-phased arrays, and while there have been advances in thin film ferrite devices, the review of this device technology in the previous edition of this book is still highly relevant. This chapter will focus on three types of phase shifters that have matured in the past decade: GaAs MESFET monolithic microwave integrated circuit (MMIC), micro-electromechanical systems (MEMS), and thin film ferroelectric-based devices. A brief review of some novel devices including thin film ferrite phase shifters and superconducting switches for phase shifter applications will be provided. Finally, the effects of modulo 2 phase shift limitations, phase errors, and transient response on bit error rate degradation will be considered. Romanofsky, Robert R. Glenn Research Center ANTENNA ARRAYS; PHASE SHIFT CIRCUITS; MICROWAVE CIRCUITS; PHASE SHIFT; INTEGRATED CIRCUITS; MICROELECTROMECHANICAL SYSTEMS; FIELD EFFECT TRANSISTORS; SUPERCONDUCTIVITY; COMMUNICATION SATELLITES; LINEARIZATION; METROLOGY; TRANSIENT RESPONSE
Author: MohammadSadegh Faraji-Dana Publisher: ISBN: Category : Languages : en Pages : 86
Book Description
Realizing robust and stable two-way links between the mobile users and the satellite is an extremely challenging RF/Microwave engineering problem. Low cost and low profile phased array is considered as the best solution for this problem. High performance low cost and miniaturized variable phase shifter is a key enabling technology for such complex smart phased array antenna system. This thesis aims at the investigation of the existing solutions to realize miniaturized, low-cost and at the same time integrable phase shifters for commercial phased array antenna systems. Among few existing approaches, analog phase shifting devices based on voltage-tunable materials offers a promising solution. Liquid Crystal (LC) and Barium Strontium Titanate (BST) are the two voltage tunable materials, which, beside their own primary applications, have found their way into Microwave and mm-Wave tunable device technologies. In this study the utilization of LC and BST in analog phase shifters has been rigorously investigated, the advantages and drawbacks of each when applied in different realizations have been discussed and further development and improvements in designs have been suggested. To achieve more compact designs for Ka-band phase shifters, a comprehensive design methodology for tunable filter-type phase shifter is proposed in this dissertation. The most commonly used phase shifting architectures for the phased array antennas are RF, LO, IF and base-band phase shifting. It should be mentioned that LO, IF and base-band phase shifting are not suitable for phased arrays with large number of elements due to the formidable cost and complexity, particularly for Tx phased array systems which require one phase shifter per antenna element to meet the radiation mask. Therefore, this thesis is concentrated on RF (Microwave/mm-Wave) phase shifting, which is the most common for large phased array antenna systems. Since one of the most important requirement in the design of Ka-Band phase shifters for phased array systems is the high level of miniaturization, dictated by antenna element spacing constraint, the thesis also addresses the highly compact structure of such phase shifters. In particular, a novel phase shifting concept based on very high dielectric constant materials has been explored. It is shown that by using this new concept, a highly miniaturized variable phase shifter with more than 360 degrees phase tuning range is attainable.
Author: Rick Sturdivant Publisher: Artech House ISBN: 163081489X Category : Technology & Engineering Languages : en Pages : 288
Book Description
Phased arrays, while traditionally used in radar systems, are now being used or proposed for use in internet of things (IoT) networks, high-speed back haul communication, terabit-per-second satellite systems, 5G mobile networks, and mobile phones. This book considers systems engineering of phased arrays and addresses not only radar, but also these modern applications. It presents a system-level perspective and approach that is essential for the successful development of modern phased arrays. Using practical examples, this book helps solve problems often encountered by technical professionals. Thermal management challenges, antenna element design issues, and architectures solutions are explored as well as the benefits and challenges of digital beam forming. This book provides the information required to train engineers to design and develop phased arrays and contains questions at the end of each chapter that professors will find useful for instruction.
Author: Robert J. Mailloux Publisher: Artech House Publishers ISBN: 9781580536899 Category : Technology & Engineering Languages : en Pages : 496
Book Description
"This thoroughly revised edition of the Artech House classic, Phased Array Antenna Handbook, offers the most up-to-date and broadest view of array antennas and systems. Supported with over 350 equations and more than 270 illustrations, the book offers complete design details that allow practitioners to size an array system with speed and confidence."--BOOK JACKET.Title Summary field provided by Blackwell North America, Inc. All Rights Reserved
Author: Robert J. Mailloux Publisher: Morgan & Claypool Publishers ISBN: 1598291823 Category : Antenna arrays Languages : en Pages : 93
Book Description
Provides a compact but comprehensive treatment of the scanned array, from the underlying basis for array pattern behaviour to the engineering choices leading to successful design. The book describes the scanned array in terms of radiation from apertures and wire antennas and introduces the effects resulting directly from scanning.
Author: Jian Xu Publisher: ISBN: Category : Languages : en Pages : 79
Book Description
In this thesis, X-band phase shifters have been investigated and developed to meet the needs of future multi-antenna communication systems. Different types of digital phase shifters have been described with design equations. An X-band analog phase shifter using vector sum method is designed and simulated in ADS environment. A new biphase modulator using Lange coupler structure is developed and employed in the analog phase shifter. The simulation results show around 12dB insertion loss and around 10dB reflection coefficient. The phase error for each state is better than some of the commercially available products. As an application of the phase shifter, a phased array receiver is proposed on a print circuit board. The receiver is to instantaneously configure the phased array to the direction to which the signal comes from. The integration of antenna array, RF circuit, analog-to-digital converter, and microprocessor gives the receiver practical application in wireless communication area.
Author: Gabriel M. Rebeiz Publisher: John Wiley & Sons ISBN: 0471462888 Category : Technology & Engineering Languages : en Pages : 512
Book Description
Ultrasmall Radio Frequency and Micro-wave Microelectromechanical systems (RF MEMs), such as switches, varactors, and phase shifters, exhibit nearly zero power consumption or loss. For this reason, they are being developed intensively by corporations worldwide for use in telecommunications equipment. This book acquaints readers with the basics of RF MEMs and describes how to design practical circuits and devices with them. The author, an acknowledged expert in the field, presents a range of real-world applications and shares many valuable tricks of the trade.
Author: Hubregt J. Visser Publisher: John Wiley & Sons ISBN: 0470871180 Category : Technology & Engineering Languages : en Pages : 376
Book Description
Reflecting a growing interest in phased array antenna systems, stemming from radar, radio astronomy, mobile communications and satellite broadcasting, Array and Phased Array Antenna Basics introduces the principles of array and phased array antennas. Packed with first-hand practical experience and worked-out examples, this is a valuable learning tool and reference source for those wishing to improve their understanding of basic array antenna systems without relying heavily on a thorough knowledge of electromagnetics or antenna theory. Features a general introduction to antennas and explains the array antenna principle through discussion of the physical characteristics rather than the theory Explores topics often not covered in antenna textbooks, such as active element pattern, array feeding, means of phase changing, array antenna characterisation, sequential rotation techniques and reactively loaded arrays Guides the reader through the necessary mathematics, allowing them to move onto specialist books on array and phased array antennas with a greater understanding of the topic Supported by a companion website on which instructors and lecturers can find electronic versions of the figures An ideal introduction for those without a background in antennas, this clear, concise volume will appeal to technicians, researchers and managers working in academia, government, telecommunications and radio astronomy. It will also be a valuable resource for professionals and postgraduates with some antenna knowledge.
Author: Robert R. Romanofsky
Author: Robert R. Romanofsky
Author: National Aeronautics and Space Administration (NASA)
Author: MohammadSadegh Faraji-Dana
Author: Rick Sturdivant
Author: Robert J. Mailloux
Author: Robert J. Mailloux
Author: Dionne T. Y. Chung
Author: Jian Xu
Author: Gabriel M. Rebeiz
Author: Hubregt J. Visser