Shared-aperture Adaptive Microwave and Millimeter Wave Antennas PDF Download

Author: Hernan Vinicio Barba Molina
Publisher:
ISBN:
Category :
Languages : de
Pages :

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Author: Duixian Liu
Publisher: John Wiley & Sons
ISBN: 047099617X
Category : Technology & Engineering
Languages : en
Pages : 866

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Book Description
This book explains one of the hottest topics in wireless and electronic devices community, namely the wireless communication at mmWave frequencies, especially at the 60 GHz ISM band. It provides the reader with knowledge and techniques for mmWave antenna design, evaluation, antenna and chip packaging. Addresses practical engineering issues such as RF material evaluation and selection, antenna and packaging requirements, manufacturing tolerances, antenna and system interconnections, and antenna One of the first books to discuss the emerging research and application areas, particularly chip packages with integrated antennas, wafer scale mmWave phased arrays and imaging Contains a good number of case studies to aid understanding Provides the antenna and packaging technologies for the latest and emerging applications with the emphases on antenna integrations for practical applications such as wireless USB, wireless video, phase array, automobile collision avoidance radar, and imaging

Author: Artem Boriskin
Publisher: Springer
ISBN: 3319627732
Category : Technology & Engineering
Languages : en
Pages : 494

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This book presents the technology of millimetre waves and Terahertz (THz) antennas. It highlights the importance of moderate and high-gain aperture antennas as key devices for establishing point-to-point and point-to-multipoint radio links for far-field and near-field applications, such as high data-rate communications, intelligent transport, security imaging, exploration and surveillance systems. The book provides a comprehensive overview of the key antenna technologies developed for the mm wave and THz domains, including established ones – such as integrated lens antennas, advanced 2D and 3D horn antennas, transmit and reflect arrays, and Fabry-Perot antennas – as well as emerging metasurface antennas for near-field and far-field applications. It describes the pros and cons of each antenna technology in comparison with other available solutions, a discussion supplemented by practical examples illustrating the step-by-step implementation procedures for each antenna type. The measurement techniques available at these frequency ranges are also presented to close the loop of the antenna development cycle. In closing, the book outlines future trends in various antenna technologies, paving the way for further developments. Presenting content originating from the five-year ESF research networking program ‘Newfocus’ and co-authored by the most active and highly cited research groups in the domain of mm- and sub-mm-wave antenna technologies, the book offers a valuable guide for researchers and engineers in both industry and academia.

Author: Timothy H. Hwang
Publisher:
ISBN: 9781109794328
Category :
Languages : en
Pages : 85

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Millimeter-waves are of particular interest because they act as the only part of the terrestrial blackbody emission spectrum that transmits well through atmospheric obstructions such as fog and smoke. Inherently, millimeter-waves possess the ability to penetrate thin dielectrics such as clothing, which can be used at security checkpoints to determine if a person is concealing any type of weapons, explosives, or any other harmful objects. Due to the lack of sufficient detectors and sources, extensive research of millimeter-waves and their applications to imaging systems has not been carried out.

Author: Mahdi Moosazadeh
Publisher: Springer
ISBN: 3030055663
Category : Technology & Engineering
Languages : en
Pages : 137

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The research described here develops and applies novel, ultra-wideband (UWB) antipodal Vivaldi antennas for high-resolution detection of defects and damages in composite construction materials and structures using their microwave and millimeter wave imaging. The author examines the challenges of applying the UWB microwave technique in that the technique is dependent on the operating frequency used for the specified material under test. In this context, the objectives of this research volume include, but are not limited to, development of a small UWB antenna at frequency range from 5 GHz - 50 GHz for microwave and millimeter wave imaging of wide range of low loss construction materials, design of a small UWB antenna operating for microwave and millimeter wave imaging of low loss and high loss materials for the purpose of detection of surface damages of concrete under low loss materials, and development of a UWB antenna at frequency range from 2 GHz - 27 GHz for microwave imaging of low loss and high loss materials such as concrete structures and layered structures for the purpose of detection of cavities inside concrete.

Author: K. Sigfrid Yngvesson
Publisher:
ISBN:
Category :
Languages : en
Pages : 104

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Author:
Publisher:
ISBN: 9789537619671
Category :
Languages : en
Pages :

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Author: Jaco du Preez
Publisher: Springer
ISBN: 3319350684
Category : Technology & Engineering
Languages : en
Pages : 165

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This book comprehensively reviews the state of the art in millimeter-wave antennas, traces important recent developments and provides information on a wide range of antenna configurations and applications. While fundamental theoretical aspects are discussed whenever necessary, the book primarily focuses on design principles and concepts, manufacture, measurement techniques, and practical results. Each of the various antenna types scalable to millimeter-wave dimensions is considered individually, with coverage of leaky-wave and surface-wave antennas, printed antennas, integrated antennas, and reflector and lens systems. The final two chapters address the subject from a systems perspective, providing an overview of supporting circuitry and examining in detail diverse millimeter-wave applications, including high-speed wireless communications, radio astronomy, and radar. The vast amount of information now available on millimeter-wave systems can be daunting for researchers and designers entering the field. This book offers readers essential guidance, helping them to gain a thorough understanding based on the most recent research findings and serving as a sound basis for informed decision-making.

Author: Shaileshachandra Pandey
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Recent years have witnessed extensive research into the synthesis of new materials (e.g., metamaterials that typically utilize periodic structures). It is well known that periodic structures comprising metallic patches or apertures behave as artificial dielectrics, and screens that resemble frequency selective surfaces (FSSs) can be used as artificially synthesized materials to replace conventional dielectrics. Several designs have been developed for some applications where metamaterials were engineered by utilizing arrays of small patches or apertures to realize desired electromagnetic behavior for antenna applications, thus improving their performance. This dissertation begins with an innovative approach for engineering artificial materials or commercial-off-the-shelf (COTS) materials to achieve any dielectric constants that we need to implement flat lens design, which does not suffer from the shortcomings of metamaterials, typically required in designs based on transformation optics (TO). We refer to this technique as dial-a-dielectric (DaD). The DaD method is the one in which we tweak the dielectric constants of the artificial material by placing square patches on top of dielectric rings, to achieve the desired dielectric constants. We investigate the use of the proposed technique for synthesizing artificial dielectrics to the design of metasurfaces (e.g., reflectarrays) that have wider bandwidths than those of the present designs, which also utilize resonant elements that rely on resonant inclusions (e.g., narrow bandwidth, dispersion, and loss). Next, we introduce an alternate design that extends the DaD-based lens design procedure to the dielectric-only reflectarray problem. This reflectarray design is realized by printing dielectric blocks on a PEC ground plane. The proposed reflectarray design gives a linearly increasing gain variation compared to the bandwidth as typically reported in the literature (i.e., 10% for the designs based on the conventional approach).This dissertation further explores the design of a flat lens, which utilizes multilayer frequency selective surfaces (FSSs) in free space. The lens can be space-qualified since, unlike conventional designs for lenses, it does not need to use dielectric materials. We further describe a systematic procedure for realizing the requisite radially varying phase shifts, by using locally periodic multilayer FSSs to realize a lightweight, low-profile and low-cost design. Next, we present a novel approach for designing a low-cost phase-shifting device based on the use of reconfigured FSS screens, which have relatively low insertion loss and are easy to fabricate. Our goal is to provide an arbitrary phase shift to the antenna element of an array that it would require for precise control of the beam-pointing to communicate with a satellite. Lastly, offset-fed-metal-only reflectarrays realized by using cross-slot and cross/cross-groove phasing elements, which are 2D and 3D FSS elements, respectively, are presented. These reflectarray designs are suitable for space applications in which the use of dielectrics is not desired. These FSS elements are chosen such that they can be 3D-printed. We also compare the performances of reflectarrays with the existing metal-only reflectarray design to show the efficacy of the proposed method. The design investigated shows the improved gain, aperture efficiency, and low-profile features.

Author: Mohammad (Mim) Rahimi
Publisher: MDPI
ISBN: 3036505849
Category : Science
Languages : en
Pages : 230

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Lithium-ion batteries (LIBs), as a key part of the 2019 Nobel Prize in Chemistry, have become increasingly important in recent years, owing to their potential impact on building a more sustainable future. Compared with other batteries developed, LIBs offer high energy density, high discharge power, and a long service life. These characteristics have facilitated a remarkable advance of LIBs in many frontiers, including electric vehicles, portable and flexible electronics, and stationary applications. Since the field of LIBs is advancing rapidly and attracting an increasing number of researchers, it is necessary to often provide the community with the latest updates. Therefore, this book was designed to focus on updating the electrochemical community with the latest advances and prospects on various aspects of LIBs. The materials presented in this book cover advances in several fronts of the technology, ranging from detailed fundamental studies of the electrochemical cell to investigations to better improve parameters related to battery packs.