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Record Nr. |
UNINA9910457133803321 |
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Autore |
Kozakoff D. J. |
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Titolo |
Analysis of radome-enclosed antennas / / Dennis J. Kozakoff |
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Pubbl/distr/stampa |
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Boston : , : Artech House, , 2010 |
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[Piscataqay, New Jersey] : , : IEEE Xplore, , [2009] |
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ISBN |
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Edizione |
[2nd ed.] |
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Descrizione fisica |
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1 online resource (318 p.) |
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Collana |
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Artech House antennas and propagation series |
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Disciplina |
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Soggetti |
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Radomes |
Radar |
Electronic books. |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Analysis of Radome-Enclosed Antennas Second Edition; Contents; Foreword; Preface; Acknowledgments; Part I Background and Fundamentals; 1 Overview of Radome Phenomenology; 1.1 History of Radome Development; 1.2 Radome-Antenna Interaction; 1.2.1 Boresight Error (BSE) and Boresight Error Slope (BSES); 1.2.2 Registration Error; 1.2.3 Antenna Sidelobe Degradation; 1.2.4 Depolarization; 1.2.5 Antenna Voltage Standing Wave Ratio (VSWR); 1.2.6 Introduction of an Insertion Loss Due to the Presence of the Radome; 1.3 Significance of Parameters in Radome Performance |
1.4 Radome Technology Advances Since the First Edition1.4.1 Use of Metamaterials; 1.4.2 Frequency Selective Radomes; 1.4.3 Concealed Radomes; References; 2 Basic Principles and Conventions; 2.1 Vector Mathematics; 2.2 Electromagnetic Theory; 2.3 Matrices; 2.4 Coordinate Systems and Gimbal Relationships; 2.5 Specialized Antenna Pointing Gimbals; 2.5.1 Maritime SATCOM; 2.5.2 Vehicular Applications; 2.5.3 Airborne Applications; References; Selected Bibliography; 3 Antenna Fundamentals; 3.1 Directivity and Gain; 3.2 Radiation from Current Elements; 3.3 Antenna Array Factor |
3.4 Linear Aperture Distributions3.5 Two-Dimensional Distributions; 3.6 Spiral Antennas; References; 4 Radome Dielectric Materials; 4.1 |
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Organic Materials; 4.1.1 Monolithic Radomes; 4.1.2 Sandwich Radomes; 4.2 Inorganic Materials; 4.3 Dual Mode (RF/IR) Materials; 4.3.1 Nonorganic Dual-Mode Materials; 4.3.2 Organic Dual-Mode Materials; 4.4 Effect of Radome Material on Antenna Performance; 4.4.1 Receiver Noise; 4.4.2 Noise Temperature Without Radome; 4.4.3 Noise Temperature with Radome; References; Part II Radome Analysis Techniques; 5 Dielectric Wall Constructions |
5.1 Mathematical Formulation for Radome Wall Transmission5.1 Mathematical Formulation for Radome Wall Transmission; 5.1.2 Transmission Coefficients for Circular Polarization; 5.1.3 Transmission for Elliptical Polarization; 5.2 Radome Types, Classes, and Styles Definition; 5.2.1 Radome Type Definitions; 5.2.2 Radome Class Definitions; 5.2.3 Radome Style Definitions; 5.3 Wall Style Electrical Performance; 5.3.1 Half-Wave Wall Radomes (Style a); 5.3.2 Thin Walled Radomes (Style b); 5.3.3 A Sandwich Radome (Style c); 5.3.4 Multilayer Radomes (Style d); 5.3.5 B-Sandwich Radomes (Style e) |
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Sommario/riassunto |
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A radome is a structural, weatherproof enclosure that protects microwave and radar antenna from ice, freezing rain, wind, and debris. This new, updated edition to an Artech House classic provides a current, comprehensive overview of the design and analysis of radomes. The second edition includes a wealth of new material, including three new chapters on radome measurement techniques, environmental effects on radomes, and new radome technology. This unique book helps professionals to design radomes for top performance, understand the effect a radome has on a particular antenna's operation, and become knowledgeable about how to specify acceptable radome equipment. Over 130 illustrations and more than 250 equations support key topics throughout the book. CD-ROM Included! Includes powerful codes and highly useful tools that help professionals estimate the electrical performance degradation that may occur when an antenna system is enclosed by a radome. |
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2. |
Record Nr. |
UNINA9910789612903321 |
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Autore |
Koller Dov |
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Titolo |
The restless plant [[electronic resource] /] / Dov Koller ; edited by Elizabeth Van Volkenburgh |
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Pubbl/distr/stampa |
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Cambridge, Mass., : Harvard University Press, 2011 |
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ISBN |
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Descrizione fisica |
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1 online resource (225 p.) |
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Altri autori (Persone) |
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Disciplina |
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Soggetti |
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Plants - Irritability and movements |
Tropisms |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Nota di contenuto |
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Frontmatter -- Contents -- Foreword -- Author’s Preface -- Editor’s Preface -- 1. A Guided Tour of Plant Movements -- 2. Motors -- 3. Gravity- Guided Movements -- 4. The Underground World -- 5. Light- Driven Movements -- 6. Tracking the Sun -- 7. Prey- Driven Movements -- 8. Liberation Movements: Leaving the Nest -- Conclusion -- Glossary -- Further Reading -- Index |
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Sommario/riassunto |
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Dov Koller (1925-2007) was working on this book when he passed away, and his daughter Daphne (a MacArthur fellow, mathematician and computer scientist at Stanford with her own book published in 2009 by MIT Press) sent the manuscript to MGF. This is the summary of a career and a field (plant biology), written in accessible language so that it can extend its reach beyond a small circle of specialists. The book is probably the most up-to-date account of movement in plants. It draws on examples across the spectrum of plant families, including mosses, ferns, conifers and flowering plants. The book begins with an explanation of how cellular motors work and then describes how cells manage to move organs. The bulk of the book explains how plants and plant organs (roots, stems, leaves, flowers) move in different environments and situations. Movement of roots, tubers, rhizomes and other plant parts underground is described in detail and much of this information is suprising because we normally don’t see it happening. Movement of stems and leaves toward the light is the research specialty of the author, and is explained in detail in two chapters. Effort is made |
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to present information at the subcellular and cellular levels, including the roles of receptors, signaling pathways, hormones, and physiological responses leading to motor function. The adaptive significance of movements is discussed in each case. |
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