Ultra Wideband Phased Arrays

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Ultra-Wideband Phased Arrays

Author : Chao Chun Chen
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Ultra-Wideband Phased Arrays by : Chao Chun Chen

Download or read book Ultra-Wideband Phased Arrays written by Chao Chun Chen and published by . This book was released on 1973 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes the activities and accomplishments associated with the two major technical tasks on this project. The first task is the development of a linearly polarized two-dimensional phased array which is well matched simultaneously over a large scan angle range and over an octave bandwidth. The second task is to extend the impedance matching of the linearly polarized element to an arbitrarily polarized element for wide-angle scanning and wide tunable bandwidth.

Low-profile, Modular, Ultra-wideband Phased Arrays

Author : Steven S. Holland
Publisher :
ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.:/5 (794 download)

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Book Synopsis Low-profile, Modular, Ultra-wideband Phased Arrays by : Steven S. Holland

Download or read book Low-profile, Modular, Ultra-wideband Phased Arrays written by Steven S. Holland and published by . This book was released on 2011 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrawideband (UWB) phased antenna arrays are critical to the success of future multi-functional communication, sensing, and countermeasure systems, which will utilize a few UWB phased arrays in place of multiple antennas on a platform. The success of this new systems approach relies in part on the ability to manufacture and assemble low-cost UWB phased arrays with excellent radiation characteristics. This dissertation presents the theory and design of a new class of UWB arrays that is based on unbalanced fed tightly-coupled horizontal dipoles over a ground plane. Practical implementation of this concept leads to two inexpensive wideband array topologies, the Banyan Tree Antenna (BTA) Array, and the Planar Ultrawideband Modular Antenna (PUMA) Array. The key challenge in designing unbalanced-fed tightly-coupled dipole arrays lies in the control of a common mode resonance that destroys UWB performance. This work introduces a novel feeding strategy that eliminates this resonance and results in wideband, wide-angle radiation. More importantly, the new feeding scheme is simple and intuitive, and can be implemented at low-cost in both vertically and planarly-integrated phased array architectures. Another desirable byproduct of this topology is the electrical and mechanical modularity of the aperture, which enables easy manufacturability and assembly. A theoretical framework is presented for the new phased array topologies, which is then applied to the design of innite BTA and PUMA arrays that achieve 4:1 and 5:1 bandwidths, respectively. A practical application of this technology is demonstrated through the full design, fabrication, and measurement of a 7.25-21GHz 16x16 dual-pol PUMA array prototype for SATCOM applications.

Analysis and Design of a Sub-THz Ultra-wideband Phased-array Transmitter

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

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Book Synopsis Analysis and Design of a Sub-THz Ultra-wideband Phased-array Transmitter by : Luca Steinweg

Download or read book Analysis and Design of a Sub-THz Ultra-wideband Phased-array Transmitter written by Luca Steinweg and published by . This book was released on 2023* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ultra-wideband RF Photonic Phased Array Antenna

Author : Dylan D. Ross
Publisher :
ISBN 13 : 9781369115857
Total Pages : 85 pages
Book Rating : 4.1/5 (158 download)

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Book Synopsis Ultra-wideband RF Photonic Phased Array Antenna by : Dylan D. Ross

Download or read book Ultra-wideband RF Photonic Phased Array Antenna written by Dylan D. Ross and published by . This book was released on 2016 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern RF antenna systems are being asked to address many simultaneous and pressing challenges, e.g., wide operational bandwidth, dynamic gain profiles, and conformal profiles. One way to address these is to develop a flexible and ultra-wideband (UWB) phased array antenna. However, the design, fabrication, and integration of such an array using an all-RF feed is exceedingly difficult. Thus, presented is an optical feeding technique to achieve efficient excitation of an UWB connected-array (CA) antenna. By feeding the array optically, preservation of the theoretical bandwidth and low-profile of elementary connected dipole elements is enabled. Coupling of light to a photodiode merely requires enough space to firmly secure a fiber ferrule, allowing population of more densely packed arrays, namely the CA, which offers potentially wide operational bandwidth. Additionally, optical feeding of the array can provide low noise excitation of the radiating elements, which supports high fidelity beam steering of independent signals over the array's ultra-wide bandwidth along with variable gain with suitable apodization. Currently all of these abilities are unattainable by conventional electronic feeding networks. Previously the main limiting factor for the realization of such an optical system was the low power handling capability of the photodiode at the antenna feed point. Recently, however, modified uni-travelling carrier (MUTC) photodiodes, flip-chip bonded to high-thermal conductivity aluminum nitride (AlN), have achieved output powers of over 1 W at 10 GHz under CW operation [37], and over 10 W using pulsed power modulation [38]. A robust prototype MUTC photodiode-integrated antenna array on AlN with direct fiber feed to each antenna element is discussed and demonstrated that provides 5-20 GHz bandwidth and size, weight, and power (SWaP) superior to conventional electronic phased array systems [44].

Ultra-wideband Phased Array Radar for Short-range Imaging Applications

Author : Pei-Yu Chao
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.:/5 (676 download)

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Book Synopsis Ultra-wideband Phased Array Radar for Short-range Imaging Applications by : Pei-Yu Chao

Download or read book Ultra-wideband Phased Array Radar for Short-range Imaging Applications written by Pei-Yu Chao and published by . This book was released on 2009 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Development of an Ultra-wideband Low-profile Wide Scan Angle Phased Array Anatenna

Author : Henry Hoang Vo
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (924 download)

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Book Synopsis Development of an Ultra-wideband Low-profile Wide Scan Angle Phased Array Anatenna by : Henry Hoang Vo

Download or read book Development of an Ultra-wideband Low-profile Wide Scan Angle Phased Array Anatenna written by Henry Hoang Vo and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Coupling in phased arrays is a major issue. Mutual coupling causes both gain and bandwidth reduction. Such coupling arises from the presence of adjacent elements that produce scattering and losses during low-angle beam steering. The scattering effect is comprised of (1) structural scattering and (2) antenna-mode coupling and associated losses. Losses occur when the coupled energy received by adjacent elements is dissipated at the back-end loads, resulting in lower gain at wide scan angles. In addition, the interference from periodic nature of large arrays or feed networks may produce undesired scattering modes and traveling waves that limit the upper bound of the operational frequency and maximum scan angle in ultra-wideband (UWB) arrays. As a result, current ultra wideband (UWB) array designs typically have limited scanning to no more than 45° from normal. In this dissertation, we examine the low angle scanning issues. These issues are verified via full-wave simulation. Our studies show that mutual coupling in the H-plane is stronger than in the E-plane, likely due to the dipole element pattern shape.

Low Cost Ultra-wideband Millimeter-wave Phased Arrays

Author : Markus H. Novak
Publisher :
ISBN 13 :
Total Pages : 141 pages
Book Rating : 4.:/5 (12 download)

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Book Synopsis Low Cost Ultra-wideband Millimeter-wave Phased Arrays by : Markus H. Novak

Download or read book Low Cost Ultra-wideband Millimeter-wave Phased Arrays written by Markus H. Novak and published by . This book was released on 2017 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: At millimeter-wave frequencies, planar co-fabrication of the entire array is critical to achieving repeatable fabrication, by eliminating the need for complex assembly at such small scales. Simultaneously, compatibility with low-cost PCB processes enables the potential for large scale applicability. The limitations of PCB fabrication are discussed, and a planarized balun consisting of only three vias and two metal layers is developed. The design is shown to operate across 24–72 GHz, with VSWR

Ultrawideband Phased Array Antenna Technology for Sensing and Communications Systems

Author : Alan J. Fenn
Publisher : MIT Press
ISBN 13 : 0262328917
Total Pages : 297 pages
Book Rating : 4.2/5 (623 download)

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Book Synopsis Ultrawideband Phased Array Antenna Technology for Sensing and Communications Systems by : Alan J. Fenn

Download or read book Ultrawideband Phased Array Antenna Technology for Sensing and Communications Systems written by Alan J. Fenn and published by MIT Press. This book was released on 2015-04-10 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: Practical ultrawideband phased array technology used in airborne and ground-based systems applications. Ultrawideband phased array antennas are an enabling technology for many ground-based and airborne communications and radar systems. This book surveys electromagnetic theory and phased array antenna theory and provides examples of ultrawideband phased array antenna technology. It describes some of the research on ultrawideband phased arrays undertaken by the authors and their colleagues at MIT Lincoln Laboratory over the last ten years. The book focuses on experimental prototype ultrawideband phased array technology developed at Lincoln Laboratory for applications in the VHF and UHF bands from approximately 100 MHz to 1 GHz, and addresses dipole, monopole, loop, and other antenna array elements. It offers examples of antennas for both airborne and ground vehicle applications. Most of the examples are developed in the context of rapid prototyping for quick assessment of communications and radar systems feasibility, with measurements and numerical electromagnetic simulation results provided for many prototype examples. The book is intended primarily for practicing antenna engineers, radar engineers, and communications engineers, and for graduate students and researchers in electrical engineering. Readers need no prior knowledge of ultrawideband antennas, although some background in electromagnetic theory, antennas, radar, and communications would be helpful.

Ultra-wideband, On-chip Phased Arrays for Millimeter-wave and Terahertz Applications

Author : Seckin Sahin
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (123 download)

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Book Synopsis Ultra-wideband, On-chip Phased Arrays for Millimeter-wave and Terahertz Applications by : Seckin Sahin

Download or read book Ultra-wideband, On-chip Phased Arrays for Millimeter-wave and Terahertz Applications written by Seckin Sahin and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Finally, we develop a novel non-contact characterization method for simultaneous characterization of conventional antenna parameters, including the antenna port input impedance, antenna gain and radiation pattern, without requiring a network analyzer connection to the antenna port. This method treats the test antenna and the network analyzer as a 2-port open-air fixture whose network representation corresponds to the desired antenna parameters. The unknown network parameters of the 2-port open-air are determined via a calibration process, and then related to antenna impedance and gain as a function of frequency. Additionally, the radiation pattern of the test antenna can also be characterized using measured reflection coefficient at the network analyzer port for two offset-short terminations of the test antenna port, while mechanically scanning the test antenna over the desired angular range.

New Methods in Ultra-wideband Array Design and Finite-difference Time-domain Modeling of Memristive Devices

Author : Micah Dennis Gregory
Publisher :
ISBN 13 :
Total Pages : 125 pages
Book Rating : 4.:/5 (862 download)

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Book Synopsis New Methods in Ultra-wideband Array Design and Finite-difference Time-domain Modeling of Memristive Devices by : Micah Dennis Gregory

Download or read book New Methods in Ultra-wideband Array Design and Finite-difference Time-domain Modeling of Memristive Devices written by Micah Dennis Gregory and published by . This book was released on 2013 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Array Pattern Optimization

Author : Jafar Ramadhan Mohammed
Publisher : BoD – Books on Demand
ISBN 13 : 1789857414
Total Pages : 122 pages
Book Rating : 4.7/5 (898 download)

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Book Synopsis Array Pattern Optimization by : Jafar Ramadhan Mohammed

Download or read book Array Pattern Optimization written by Jafar Ramadhan Mohammed and published by BoD – Books on Demand. This book was released on 2019-03-27 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Array pattern optimization is a very important and necessary issue in the majority of modern communication systems in a variety of applications such as sonar, radar, navigation, wireless communications, and many other engineering fields. Classical methods for array pattern synthesis have worked mainly with analytical models that are linear, local and, thus, their performances were not optimum. They have always been designed with closed-form mathematical models. Unlike these analytical methods, the global optimization methods with powerful computing tools offer optimum solutions. During the last few years, the design of the antenna arrays has been a topic of significant research activity. This book presents recent advances in the field of array pattern optimization. It is targeted primarily toward students and researchers who want to be exposed to a wide variety of antenna array design and optimization. It includes five chapters as well as the introductory chapter. These five chapters are categorized into five different areas depending on the application. These applications are ordered to address interference suppression, electronic toll collection, mmWave and ultra-wideband, integrated antennas, and educational packages for modeling smart antenna for 5G wireless communications. The book has the advantage of providing a collection of applications that are entirely independent and self-contained; thus, the interested reader can choose any chapter and skip to another without losing continuity.

Realization of a Planar Low-profile Broadband Phased Array Antenna

Author : Justin Allen Kasemodel
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (686 download)

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Book Synopsis Realization of a Planar Low-profile Broadband Phased Array Antenna by : Justin Allen Kasemodel

Download or read book Realization of a Planar Low-profile Broadband Phased Array Antenna written by Justin Allen Kasemodel and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: With space at a premium, there is strong interest to develop a single ultra wideband (UWB) conformal phased array aperture capable of supporting communications, electronic warfare and radar functions. However, typical wideband designs transform into narrowband or multiband apertures when placed over a ground plane. Therefore, it is not surprising that considerable attention has been devoted to electromagnetic bandgap (EBG) surfaces to mitigate the ground plane's destructive interference. However, EBGs and other periodic ground planes are narrowband and not suited for wideband applications. As a result, developing low-cost planar phased array apertures, which are concurrently broadband and low-profile over a ground plane, remains a challenge.

Experimental Results for a Photonic Time Reversal Processor for Adaptive Control of an Ultra Wideband Phased Array Antenna

Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Experimental Results for a Photonic Time Reversal Processor for Adaptive Control of an Ultra Wideband Phased Array Antenna by :

Download or read book Experimental Results for a Photonic Time Reversal Processor for Adaptive Control of an Ultra Wideband Phased Array Antenna written by and published by . This book was released on 2008 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The process does not require analog to digital conversion to implement and is therefore particularly suited for high bandwidth applications. Significantly, propagation distortion due to atmospheric effects, clutter, etc. is automatically accounted for with the time reversal process. The approach utilizes the reflection of an initial interrogation signal from off an extended target to precisely time match the radiating elements of the array so as to re-radiate signals precisely back to the target's location. The backscattered signal(s) from the desired location is captured by each antenna and used to modulate a pulsed laser. An electrooptic switch acts as a time gate to eliminate any unwanted signals such as those reflected from other targets whose range is different from that of the desired location resulting in a spatial null at that location.

Ultra-Wideband, Short Pulse Electromagnetics 9

Author : Frank Sabath
Publisher : Springer Science & Business Media
ISBN 13 : 0387778454
Total Pages : 482 pages
Book Rating : 4.3/5 (877 download)

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Book Synopsis Ultra-Wideband, Short Pulse Electromagnetics 9 by : Frank Sabath

Download or read book Ultra-Wideband, Short Pulse Electromagnetics 9 written by Frank Sabath and published by Springer Science & Business Media. This book was released on 2010-06-17 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-wideband (UWB), short-pulse (SP) electromagnetics are now being used for an increasingly wide variety of applications, including collision avoidance radar, concealed object detection, and communications. Notable progress in UWB and SP technologies has been achieved by investigations of their theoretical bases and improvements in solid-state manufacturing, computers, and digitizers. UWB radar systems are also being used for mine clearing, oil pipeline inspections, archeology, geology, and electronic effects testing. Ultra-wideband Short-Pulse Electromagnetics 9 presents selected papers of deep technical content and high scientific quality from the UWB-SP9 Conference, which was held from July 21-25, 2008, in Lausanne, Switzerland. The wide-ranging coverage includes contributions on electromagnetic theory, time-domain computational techniques, modeling techniques, antennas, pulsed-power, UWB interactions, radar systems, UWB communications, broadband systems and components. This book serves as a state-of-the-art reference for scientists and engineers working in these applications areas.

Ultra-Wideband, Short-Pulse Electromagnetics 6

Author : Eric L. Mokole
Publisher : Springer Science & Business Media
ISBN 13 : 9780306474811
Total Pages : 616 pages
Book Rating : 4.4/5 (748 download)

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Book Synopsis Ultra-Wideband, Short-Pulse Electromagnetics 6 by : Eric L. Mokole

Download or read book Ultra-Wideband, Short-Pulse Electromagnetics 6 written by Eric L. Mokole and published by Springer Science & Business Media. This book was released on 2003-12-31 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-Wideband Short-Pulse Electromagnetics 6 was held at theAmerican Electromagnetics 2002 conference June 3-7, 2002 at the U.S.Naval Academy in Annapolis, Maryland. Topics include: UWB RadarSystems; UWB Antennas; Scattering; Pulsed Power; Short-PulseMeasurement Techniques; Time-Domain Computation Techniques; Time-Domain Signal Processing; UWB Polarimetry; UWB Sensing ofTerrain; Wavelets & Multi-Resolution Algorithms; Target Detection &Discrimination; Propagation; Underground & Subsurface Propagation; Electromagnetic Theory; New Canonical Problems, Benchmark Solutions; Signal Processing.

High-power Phased-array Antennas Exploiting Polarization Rotation and Sub-wavelength Periodic Structures

Author : Zongtang Zhang
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (138 download)

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Book Synopsis High-power Phased-array Antennas Exploiting Polarization Rotation and Sub-wavelength Periodic Structures by : Zongtang Zhang

Download or read book High-power Phased-array Antennas Exploiting Polarization Rotation and Sub-wavelength Periodic Structures written by Zongtang Zhang and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phased-array antennas have been deployed to address some of the needs of various applications ranging from satellite, mobile, and airborne communications to radar and electronic warfare systems. However, their extreme cost and complexity have limited their application only to the most expensive pieces of military hardware. Therefore, new ideas for developing affordable, wideband, high-power-capable phased arrays are needed to enable the widespread use of this technology in future tactical systems. To address this need, this dissertation investigates four different designs of affordable, high-power-capable, passive phased-array antennas. The first design presented a dual-band polarization-rotating reflectarray. The proposed dual-band reflectarray is capable of independent beam control at each band. The second design introduced a high-power-capable, ultra-wideband phase shifter that exploits the concept of polarization rotation to achieve 1-bit electronic phase shifting capability while handling extremely high power levels. This high-power phase shifter can be used either in a high-power transmitarray or in a high-power, direct-fed, passive phased-array architecture. Two different Risley-prism-based, mechanically beam-steerable antennas were presented in Chapter 4 and 5. It can provide good 2D beam steering performance in the upper space with relatively simple structures. These two designs are expected to be useful in designing affordable, beam-steerable antennas in which scanning speed can be traded off to reduce system complexity.

Ultra-Wideband Radio Frequency Identification Systems

Author : Faranak Nekoogar
Publisher : Springer Science & Business Media
ISBN 13 : 1441997016
Total Pages : 172 pages
Book Rating : 4.4/5 (419 download)

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Book Synopsis Ultra-Wideband Radio Frequency Identification Systems by : Faranak Nekoogar

Download or read book Ultra-Wideband Radio Frequency Identification Systems written by Faranak Nekoogar and published by Springer Science & Business Media. This book was released on 2011-09-08 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-wideband Radio Frequency Identification Systems describes the essentials of radio frequency identification (RFID)systems as well as their target markets. The book covers a study of commercially available RFID systems and characterizes their performance in terms of read range and reliability in the presence of conductive and dielectric materials. The capabilities and limitations of commercial RFID systems are reported followed by comprehensive discussions of the advantages and challenges of using ultra-wideband (UWB) technology for tag/reader communications. The book presents practical aspects of RFID system such as: EPC global and ISO standards, implementation, and target markets in a simple and easy to understand language.