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Cylindrical arrays lie at the heart of the antenna systems of most major radio communication systems, including broadcasting networks, cellular 'phone systems and radar. In this book, the authors present practical theoretical methods for determining current distributions, input admittances and field patterns of a wide variety of cylindrical antennas, including the isolated antenna, the two-element array, the circular array, curtain arrays, Yagi and log-periodic arrays, planar arrays and three-dimensional arrays. Coverage includes analysis of horizontal antennas over, on and in the earth and sea, large resonant arrays of electrically short dipoles and a chapter on the theory and techniques of experimental measurement. Written by three of the leading engineers in the field, and based on world-class research carried out at Harvard over the last forty years, Cylindrical Antennas and Arrays is destined to become established as the basic reference for practising engineers and advanced students for many years to come.
Cylindrical antennas. --- Antenna arrays --- Antennas, Dipole --- Antennes-réseaux --- Antenna arrays. --- Antennas, Dipole. --- Cylindrical antennas --- Electrical & Computer Engineering --- Engineering & Applied Sciences --- Electrical Engineering --- Antennes-réseaux --- Dipole antennas --- Arrays, Antenna --- Cylinder antennas --- Antennas (Electronics) --- Large space structures (Astronautics)
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This book presents a detailed and systematic analytical treatment of scattering by an arbitrary dipole array configuration with unequal-length dipoles, different inter-element spacing and load impedance. It provides a physical interpretation of the scattering phenomena within the phased array system. The antenna radar cross section (RCS) depends on the field scattered by the antenna towards the receiver. It has two components, viz. structural RCS and antenna mode RCS. The latter component dominates the former, especially if the antenna is mounted on a low observable platform. The reduction in the scattering due to the presence of antennas on the surface is one of the concerns towards stealth technology. In order to achieve this objective, a detailed and accurate analysis of antenna mode scattering is required. In practical phased array, one cannot ignore the finite dimensions of antenna elements, coupling effect and the role of feed network while estimating the antenna RCS. This book presents the RCS estimation of an array with unequal-length dipoles. The signal reflections within the antenna system and the mutual coupling effect are considered to arrive at the total RCS for series and parallel feed. The computations are valid for any arbitrary array configurations, including side-by-side arrangement, parallel-in-echelon, etc.
Engineering. --- Physics. --- Microwaves. --- Optical engineering. --- Electronics. --- Microelectronics. --- Microwaves, RF and Optical Engineering. --- Theoretical, Mathematical and Computational Physics. --- Electronics and Microelectronics, Instrumentation. --- Scattering (Physics) --- Antennas, Dipole. --- Measurement. --- Dipole antennas --- Atomic scattering --- Atoms --- Nuclear scattering --- Particles (Nuclear physics) --- Scattering of particles --- Wave scattering --- Scattering --- Antennas (Electronics) --- Collisions (Nuclear physics) --- Particles --- Collisions (Physics) --- Electrical engineering --- Physical sciences --- Hertzian waves --- Electric waves --- Electromagnetic waves --- Geomagnetic micropulsations --- Radio waves --- Shortwave radio --- Mathematical physics. --- Microminiature electronic equipment --- Microminiaturization (Electronics) --- Electronics --- Microtechnology --- Semiconductors --- Miniature electronic equipment --- Physical mathematics --- Physics --- Mechanical engineering --- Mathematics
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