Download or read book Charakterization and Design of Small Array Antennas for Direction Of Arrival Estimation for Ultra Wideband Industrial FMCW Radar Systems written by Markus Gardill and published by . This book was released on 2015 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wideband Direction of Arrival Estimation Using Small aperture Antenna Arrays written by Ruyu Ma and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The HF, VHF and UHF bands are widely used in many important civilian and military applications, direction finding (DF) systems covering these bands are of great interest in electronic warfare support applications. However, due to large wavelength in these frequency bands, practical antennas are usually electrically small and have limited bandwidth, especially when they are deployed on moving platforms with very limited space to accommodate them. What's worse, the small aperture also set a physical limitation on the accuracy of direction of arrival (DoA) estimation. This dissertation investigates four approaches to develop small-aperture antenna arrays with enhanced bandwidth and DoA estimation accuracy. The first approach focuses on optimizing the antenna structure and array geometry. I examined different array topologies and adopted the one that provides the lowest Cramer-Rao bound (CRB) and both azimuth and elevation DoA capability, and then, further optimize it to efficiently utilize an available volume. The second approach relies on selecting and exciting a group of the platform's characteristic modes (CMs) that provides the lowest CRB. The antennas are placed at multiple locations on the platform for the best excitation of the CMs. The third approach further brings the antennas to a single location on the platform. Multiple CMs can still be excited and enable the spatically-confined array to achieve DF accuracy better than the theoretical limit of standalone array. The last approach explores a compact, wideband array with multiple independent beams and vertical polarization that is suitable for both directional networking and DoA estimation applications. Finally, I discuss possible future works that are important to developing wideband, direction of arrival estimation systems using small-aperture antenna arrays.
Download or read book Narrowband Direction of Arrival Estimation for Antenna Arrays written by Jeffrey Foutz and published by Springer Nature. This book was released on 2022-05-31 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an introduction to narrowband array signal processing, classical and subspace-based direction of arrival (DOA) estimation with an extensive discussion on adaptive direction of arrival algorithms. The book begins with a presentation of the basic theory, equations, and data models of narrowband arrays. It then discusses basic beamforming methods and describes how they relate to DOA estimation. Several of the most common classical and subspace-based direction of arrival methods are discussed. The book concludes with an introduction to subspace tracking and shows how subspace tracking algorithms can be used to form an adaptive DOA estimator. Simulation software and additional bibliography are given at the end of the book. Table of Contents: Introduction / Background on Array Processing / Nonadaptive Direction of Arrival Estimation / Adaptive Direction of Arrival Estimation / Appendix
Download or read book Characterization and Calibration of Antenna Arrays for High Resolution Direction of Arrival Estimation written by Michael Anthony Koerber and published by . This book was released on 1992 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Antennas and Phased Arrays for Radar and Communications written by Alan J. Fenn and published by Artech House. This book was released on 2007-12-01 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the author's extensive research at MIT Lincoln Laboratory, this authoritative resource offers an in-depth description of adaptive array design, emphasizing the RF characteristics, mutual coupling among elements, and field testing methods. It provides you with proven techniques for challenging projects involving radar, communication systems and antenna design. For the first time in any book, you find design guidance on specialized types of arrays, using monopole radiating elements, slotted cylinders and ultrawideband dipoles. Moreover, this unique book presents a focused near-field technique that quantifies the far-field performance of large aperture radar systems and communication systems. The book presents example prototype phased array antennas, including discussions on monopole phased arrays, finite and infinite array analyses, measurements for planar arrays of monopole elements. Further, you get a detailed explanation of focused near-field polarization characteristics of monopole arrays as related to adaptive array testing in the near field. From the fundamentals of adaptive antennas and degrees of freedom for multiple beam antennas and phased arrays… to a test bed monopole phased array and the planar near field testing technique… to arrays of horizontally polarized loop-fed slotted cylinder antennas and ultrawideband dipole arrays, this comprehensive book offers you invaluable, hands-on knowledge for your work in the field.
Download or read book Substrate Integrated Millimeter Wave Antennas for Next Generation Communication and Radar Systems written by Zhi Ning Chen and published by John Wiley & Sons. This book was released on 2021-04-08 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Substrate-Integrated Millimeter-Wave Antennas for Next-Generation Communication and Radar Systems The first and only comprehensive text on substrate-integrated mmW antenna technology, state-of-the-art antenna design, and emerging wireless applications Substrate-Integrated Millimeter-Wave Antennas for Next-Generation Communication and Radar Systems elaborates the most important topics related to revolutionary millimeter-wave (mmW) technology. Following a clear description of fundamental concepts including substrate-integrated waveguides and loss analysis, the text treats key design methods, prototyping techniques, and experimental setup and testing. The authors also highlight applications of mmW antennas in 5G wireless communication and next-generation radar systems. Readers are prepared to put techniques into practice through practical discussions of how to set up testing for impedance matching, radiation patterns, gain from 24GHz up to 325 GHz, and more. This book will bring readers state-of-the-art designs and recent progress in substrate-integrated mmW antennas for emerging wireless applications. Substrate-Integrated Millimeter-Wave Antennas for Next-Generation Communication and Radar Systems is the first comprehensive text on the topic, allowing readers to quickly master mmW technology. This book: Introduces basic concepts such as metamaterials Huygens’s surface, zero-index structures, and pattern synthesis Describes prototyping in the form of fabrication based on printed-circuit-board, low-temperature-co-fired-ceramic and micromachining Explores applications for next-generation radar and imaging systems such as 24-GHz and 77-GHz vehicular radar systems Elaborates design methods including waveguide-based feeding network, three-dimensional feeding structure, dielectric loaded aperture antenna element, and low-sidelobe synthesis The mmW is one of today’s most important emerging technologies. This book provides graduate students, researchers, and engineers with the knowledge they need to deploy mmW systems and develop new antenna designs with low cost, low loss, and low complexity.
Download or read book Direction of Arrival Estimation in Low cost Frequency Scanning Array Antenna Systems written by Mona Akbarniai Tehrani and published by . This book was released on 2017 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultra Wideband Radar Antenna Design for Snow Measurement Applications written by John Samy Mosy and published by . This book was released on 2009 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Creating a high-precision, compact and low cost snow structure and depth sensor has always been the dream of many industries, and yet hard to achieve all together. Snow depth sensors are used in avalanche search and rescue and widely in recreational snow industry, as well as in environmental monitoring systems for snow water equivalence measurements. The use of radar for snow depth measurement is not new and many techniques -such as Frequency Modulated Continuous Wave (FMCW) - have been used but they prove to be costly, bulky, and have relatively low precision. Today with the availability of chip-scale Ultra Wide-Band (UWB) technology, it is possible to create Snow Depth Sensor (SDS) and Snow Water Equivalent (SWE) measuring systems in low cost, small size and possibly mobile devices, with very high precision. One problem that remains at the RF (Radio Frequency) end of the UWB technique in measuring snow parameters is the antenna used in transmitting and receiving UWB pulses. UWB pulses are characterized by an instantaneous fractional energy bandwidth greater than about 0.20-0.25. The FCC has allocated spectrum for UWB use in the 3.1-10.6 GHz band and available chipsets generate pulses in the lower 3-6 GHz band. For creating applications that use UWB in measuring snow parameters such as SWE and snow depth, a UWB antenna is required. A successful UWB radar antenna needs to have high gain, linear phase, low dispersion and low Voltage Standing Wave Ratio (VSWR), and high directivity throughout the entire band. The antennas are to have physically compact design with high gain, linear phase, low VSWR and high directivity for UWB radar applications in the snow measurements industry. This thesis presents several antenna designs for the 3.1-10.6 GHz UWB band and the 3-6 GHz UWB lower band that have the potential to meet these requirements, and show, through laboratory measurements, modeling and simulations, that the required attributes can be achieved.
Download or read book Design and Characterization of a Planar Ultra wide Band Antenna written by Alan D. Stigliani and published by . This book was released on 2005 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical and Computer Design of Array Antennas and Analysis and Synthesis of Elctromagnetic Scattering Systems written by Bradley J. Strait and published by . This book was released on 1973 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Digital Implementation of Direction of arrival Estimation Techniques for Smart Antenna Systems written by Monther Younis Abusultan and published by . This book was released on 2010 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive antenna arrays use multiple antenna elements to form directional patterns in order to improve the performance of wireless communication systems. The antenna arrays also have the ability to detect the direction of incoming signals. These two capabilities allow a smart antenna system to adaptively beamform to more efficiently communicate between nodes. The direction-of-arrival estimation is a crucial component of the smart antenna system that uses open-loop adaptive approach. Historically this estimation has been accomplished using a personal computer. Implementing the estimation in the digital domain has the potential to provide a low cost and light weight solution due to recent advances in digital integrated circuit fabrication processes. Furthermore, digital circuitry allows for more sophisticated estimation algorithms to be implemented using the computational power of modern digital devices. This thesis presents the design and prototyping of direction-of-arrival (DOA) estimation for a smart antenna system implemented on a reconfigurable digital hardware fabric. Two DOA estimation algorithms are implemented and the performance tradeoffs between a custom hardware approach and a microprocessor-based system are compared. The algorithms were implemented for a 5.8 GHz, 8-element circular antenna array and their functionality was verified using a testbed platform. The implementation and analysis presented in this work will aid system designers to understand the tradeoffs between implementing algorithms in custom hardware versus an embedded system and when a hybrid approach is more advantageous.
Download or read book Direction of Arrival Estimation Using Antenna Arrays written by Rias Muhamed and published by . This book was released on 1996 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phased Array Antenna Analysis Computational Electromagnetics written by Daniel T. McGraith and published by . This book was released on 2007-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: McGraith discusses phased array antenna analysis using finite element methodsin this reference. (Technology & Industrial Arts)
Download or read book Active Array Antennas for High Resolution Microwave Imaging Radar written by Jiaguo Lu and published by Springer. This book was released on 2023-06-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the application of active array antennas in high-resolution microwave imaging radar systems. It introduces the basic principles, analytical methods, and performance parameters of active array antennas to achieve low profile, high efficiency, and lightweight. The book systematically elaborates the architecture, analysis, and engineering practice to achieve wideband, multi-band, multi-polarization, and common aperture in active array antennas. It explores hotspot technologies of digital array antennas, microwave photonic array antennas, and active packaging antennas. By presenting over 300 illustrations and diagrams, including schematic diagrams, block diagrams, relation diagrams, and breakdown drawings, the book enables a thorough understanding of the antenna array microsystem as the advanced phase of active array antennas and the direction of future R&D. The book is a good reference source for researchers and engineers interested in the engineering and implementation of microwave imaging radar systems and antenna technology.
Download or read book Analysis and Design of Ultra wideband Antennas in the Spectral and Temporal Domains written by Gabriela Quintero Díaz de León and published by . This book was released on 2010 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis and Design of Wideband Slot and Printed Antennas for Phased Array Antenna Systems written by Abdelnasser A. Eldek and published by . This book was released on 2004 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direction of Arrival Estimation and Optimizing Antenna Arrays written by Andrew Im and published by . This book was released on 2013 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
