The 20 Ghz Circularly Polarized High Temperature Superconducting Microstrip Antenna Array

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The 20 Ghz Circularly Polarized, High Temperature Superconducting Microstrip Antenna Array

Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722802943
Total Pages : 72 pages
Book Rating : 4.8/5 (29 download)

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Book Synopsis The 20 Ghz Circularly Polarized, High Temperature Superconducting Microstrip Antenna Array by : National Aeronautics and Space Administration (NASA)

Download or read book The 20 Ghz Circularly Polarized, High Temperature Superconducting Microstrip Antenna Array written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-16 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary goal was to design and characterize a four-element, 20 GHz, circularly polarized microstrip patch antenna fabricated from YBa2Cu3O(x) superconductor. The purpose is to support a high temperature superconductivity flight communications experiment between the space shuttle orbiter and the ACTS satellite. This study is intended to provide information into the design, construction, and feasibility of a circularly polarized superconducting 20 GHz downlink or cross-link antenna. We have demonstrated that significant gain improvements can be realized by using superconducting materials for large corporate fed array antennas. In addition, we have shown that when constructed from superconducting materials, the efficiency, and therefore the gain, of microstrip patches increases if the substrate is not so thick that the dominant loss mechanism for the patch is radiation into the surface waves of the conductor-backed substrate. We have considered two design configurations for a superconducting 20 GHz four-element circularly polarized microstrip antenna array. The first is the Huang array that uses properly oriented and phased linearly polarized microstrip patch elements to realize a circularly polarized pattern. The second is a gap-coupled array of circularly polarized elements. In this study we determined that although the Huang array operates well on low dielectric constant substrates, its performance becomes extremely sensitive to mismatches, interelement coupling, and design imperfections for substrates with high dielectric constants. For the gap-coupled microstrip array, we were able to fabricate and test circularly polarized elements and four-element arrays on LaAlO3 using sputtered copper films. These antennas were found to perform well, with relatively good circular polarization. In addition, we realized a four-element YBa2Cu3O(x) array of the same design and measured its pattern and gain relative to a room temperature copper array. The patterns were essentia...

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 652 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Electrically Small, Superdirective, and Superconducting Antennas

Author : R. C. Hansen
Publisher : John Wiley & Sons
ISBN 13 : 047004103X
Total Pages : 168 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Electrically Small, Superdirective, and Superconducting Antennas by : R. C. Hansen

Download or read book Electrically Small, Superdirective, and Superconducting Antennas written by R. C. Hansen and published by John Wiley & Sons. This book was released on 2006-06-19 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: A seminal reference to electrically small antennas for today's wireless and Wi-Fi world This book is dedicated to the challenges posed by electrically small antennas and their solutions. Electrically small antennas have characteristics that limit performance: low radiation resistance, high reactance, low efficiency, narrow bandwidth, and increased loss in the matching network. Most of these limitations are shared by two other classes of antennas: superdirective and superconducting antennas. All three classes of antennas are thoroughly treated in three interrelated parts: * Part One, Electrically Small Antennas, begins with a discussion of the fundamental limitations of bandwidth and matching, then provides detailed design information on loaded whips and dipoles, ferrite loops, patches with unusual substrates, and dielectric resonator antennas. In addition to exploring designs that work, the author sets forth antenna designs that are based on good physics yet are poor performers, as well as designs with both poor underlying physics and poor performance. * Part Two, Superdirective Antennas, sets forth basic capabilities and limitations of superdirective antennas, both apertures and arrays, and investigates bandwidth, efficiency, and tolerances. The author explores the magnification of intrinsic matching circuit loss due to a large mismatch and evaluates the recent and promising non-Foster matching circuits. * Part Three, Superconducting Antennas, reviews superconductivity concepts and new principles for dipole, loop, and patch antennas. The author concludes with a discussion of superconducting delay lines for wideband phased array steering. Throughout the book, the author provides readers with a historical perspective, setting forth what has been investigated, what works, and what does not. Each part has its own author index and a list of references to help readers continue their explorations of particular topics.With the explosive demand for wireless and Wi-Fi, this seminal reference is essential reading for all antenna professionals and is recommended as a graduate-level course book.

Monthly Catalogue, United States Public Documents

Author :
Publisher :
ISBN 13 :
Total Pages : 1994 pages
Book Rating : 4.:/5 (31 download)

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Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1995 with total page 1994 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Monthly Catalog of United States Government Publications

Author :
Publisher :
ISBN 13 :
Total Pages : 1450 pages
Book Rating : 4.:/5 (891 download)

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Book Synopsis Monthly Catalog of United States Government Publications by :

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 1450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Small Antenna Handbook

Author : Robert C. Hansen
Publisher : John Wiley & Sons
ISBN 13 : 1118106857
Total Pages : 362 pages
Book Rating : 4.1/5 (181 download)

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Book Synopsis Small Antenna Handbook by : Robert C. Hansen

Download or read book Small Antenna Handbook written by Robert C. Hansen and published by John Wiley & Sons. This book was released on 2011-08-26 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now in an completely revised, updated, and enlarged Second Edition, Small Antennas in Portable Devices reviews recent significant theoretical and practical developments in the electrically small antenna area. Examining antenna designs that work as well as those that have limitations, this new edition provides practicing engineers and upper level and graduate students with new information on: work on improving bandwidth using spherical helix dipoles; work on electromagnetically coupled structures; exact derivation of the Q for electrically small antennas for both the TE and TM modes; and a new simplified Q formula.

Advances in Superconductivity XII

Author : T. Yamashita
Publisher : Springer Science & Business Media
ISBN 13 : 4431668772
Total Pages : 1162 pages
Book Rating : 4.4/5 (316 download)

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Book Synopsis Advances in Superconductivity XII by : T. Yamashita

Download or read book Advances in Superconductivity XII written by T. Yamashita and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 12th International Symposium on Superconductivity was held in Morioka, Japan, October 17-19, 1999. Convened annually since 1988, the symposium covers the whole field of superconductivity from fundamental physics and chemistry to a variety of applications. At the 12th Symposium, a mini-symposium focusing on the two-dimensionality of high-temperature superconductors, or the c-axis transport, and a session on vortex physics were organized. There were also many reports on the recent developments of YBCO-based coated conductors both in the United States and in Japan, AC losses of wires and tapes, developments of bulk materials with strong flux pinning, the recent progress in thin film and junction technologies, and the demonstration of various electronics applications using SQUIDs, microwave devices, and single-flux-quantum (SFQ) digital devices. This volume is a valuable resource for all those working in the field of superconductivity.

High TC Update

Author :
Publisher :
ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis High TC Update by :

Download or read book High TC Update written by and published by . This book was released on 1995 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

IEEE Antennas and Propagation Society International Symposium

Author :
Publisher :
ISBN 13 :
Total Pages : 832 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis IEEE Antennas and Propagation Society International Symposium by :

Download or read book IEEE Antennas and Propagation Society International Symposium written by and published by . This book was released on 1995 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Government Reports Announcements & Index

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Publisher :
ISBN 13 :
Total Pages : 848 pages
Book Rating : 4.3/5 (91 download)

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Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1994 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Japanese Science and Technology, 1983-1984

Author : United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
Publisher :
ISBN 13 :
Total Pages : 1080 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Japanese Science and Technology, 1983-1984 by : United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch

Download or read book Japanese Science and Technology, 1983-1984 written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch and published by . This book was released on 1985 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Government Reports Annual Index

Author :
Publisher :
ISBN 13 :
Total Pages : 1374 pages
Book Rating : 4.3/5 (243 download)

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Book Synopsis Government Reports Annual Index by :

Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1374 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Electrical & Electronics Abstracts

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Publisher :
ISBN 13 :
Total Pages : 1904 pages
Book Rating : 4.3/5 (243 download)

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Download or read book Electrical & Electronics Abstracts written by and published by . This book was released on 1997 with total page 1904 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Advanced Integrated Communication Microsystems

Author : Joy Laskar
Publisher : John Wiley & Sons
ISBN 13 : 0470409789
Total Pages : 496 pages
Book Rating : 4.4/5 (74 download)

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Book Synopsis Advanced Integrated Communication Microsystems by : Joy Laskar

Download or read book Advanced Integrated Communication Microsystems written by Joy Laskar and published by John Wiley & Sons. This book was released on 2009-02-10 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn the fundamentals of integrated communication microsystems Advanced communication microsystems—the latest technology to emerge in the semiconductor sector after microprocessors—require integration of diverse signal processing blocks in a power-efficient and cost-effective manner. Typically, these systems include data acquisition, data processing, telemetry, and power management. The overall development is a synergy among system, circuit, and component-level designs with a strong emphasis on integration. This book is targeted at students, researchers, and industry practitioners in the semiconductor area who require a thorough understanding of integrated communication microsystems from a developer's perspective. The book thoroughly and carefully explores: Fundamental requirements of communication microsystems System design and considerations for wired and wireless communication microsystems Advanced block-level design techniques for communication microsystems Integration of communication systems in a hybrid environment Packaging considerations Power and form factor trade-offs in building integrated microsystems Advanced Integrated Communication Microsystems is an ideal textbook for advanced undergraduate and graduate courses. It also serves as a valuable reference for researchers and practitioners in circuit design for telecommunications and related fields.

International Aerospace Abstracts

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ISBN 13 :
Total Pages : 980 pages
Book Rating : 4.F/5 ( download)

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Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Dissertation Abstracts International

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ISBN 13 :
Total Pages : 656 pages
Book Rating : 4.F/5 ( download)

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Download or read book Dissertation Abstracts International written by and published by . This book was released on 2002 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Array and Phased Array Antenna Basics

Author : Hubregt J. Visser
Publisher : John Wiley & Sons
ISBN 13 : 0470871180
Total Pages : 376 pages
Book Rating : 4.4/5 (78 download)

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Book Synopsis Array and Phased Array Antenna Basics by : Hubregt J. Visser

Download or read book Array and Phased Array Antenna Basics written by Hubregt J. Visser and published by John Wiley & Sons. This book was released on 2006-02-03 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.