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This book explains the basics of antenna theory and operation, and how antennas in different configurations are utilized at different frequencies ranging from radio to terahertz.
The material is presented in a modular format. Beginning with the history and important advancements in antenna design and the range of antenna applications that include communications, remote sensing, radar, biomedicine, the reader is introduced to the parameters and figures of merit used to evaluate antennas. Concepts such as radiation pattern, directivity, gain, bandwidth, polarization, and others are explained in a very straightforward manner.
Basic wire antennas-small dipoles, dipoles of finite length, and loop antennas-are described in detail. Array antennas in different geometrical configurations are discussed. The reader is also exposed to a variety of other antennas, such as reflectors, lenses, horns, microstrip, Yagi, and frequency-independent antennas.
A separate chapter is devoted to highlight the technical challenges involved in integrating an antenna with an infrared detector to efficiently collect terahertz radiation. These integrated antennas have applications in areas such as remote sensing, radio astronomy, plasma diagnostics, atmospheric studies, and space communications.
Finally, techniques for measurement of key antenna parameters-radiation pattern, efficiency, gain, and impedance-are described. The advant-ages and disadvantages of using anechoic chambers versus outdoor ranges are discussed as well.
Students pursuing electrical/electronics/communi-cation engineering courses, will immensely benefit from the fundamental treatment of antennas presented here. The book will also be useful to professional engineers and researchers who will find in it the necessary tools and examples that can help them in integrating antennas in their projects/research problems.
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Pages : 108
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