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Books > Professional & Technical > Electronics & communications engineering > Electronics engineering > Applied optics
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Electronically Scanned Arrays (ESAs) and K-Space Gain Formulation (Hardcover, 1st ed. 2019)
Loot Price: R2,404
Discovery Miles 24 040
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Electronically Scanned Arrays (ESAs) and K-Space Gain Formulation (Hardcover, 1st ed. 2019)
Expected to ship within 18 - 22 working days
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This book fills in details that are often left out of modern books
on the theory of antennas. The starting point is a discussion of
some general principles that apply to all electronic systems and to
antennas in particular. Just as time domain functions can be
expanded in terms of sine waves using Fourier transforms, spatial
domain functions can be expanded in terms of plane waves also using
Fourier transforms, and K-space gain is the spatial Fourier
transform of the aperture weighting function. Other topics
discussed include the Discrete Fourier Transform (DFT) formulation
of antenna gain and what is missing in this formulation, the effect
of sky temperature on the often specified G/T ratio of antennas,
sidelobe control using conventional and novel techniques, and ESA
digital beamforming versus adaptive processing to limit
interference. Presents content the author derived when first asked
to evaluate the performance of an electronically scanned array
under design with manufacturing imperfections and design
limitations; Enables readers to understand the firm theoretical
foundation of antenna gain even when they must start from
well-known formulations rather than first principles; Explains in a
straightforward manner the relationship between antenna gain and
aperture area; Discusses the relationship between sidelobe control
algorithms and aperture shape, how to take advantage of it, and
what the penalties are; Shows the equivalence of Minimum-Variance,
Distortionless Response (MVDR) and Space-Time Adaptive Processing
(STAP) and how these algorithms can be used with ESA subarrays to
mitigate interference.
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