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Abstract
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In this article, a comprehensive review of published techniques for reducing
radar cross-section (RCS) of a target in various military and industrial applications
is presented. This review contains the developments in this field over the
last 24 years. In this comparative review, existing RCS reduction (RCSR)
methods are categorized based on the type and the shape of their structures
and their electromagnetic behavior and a variety of techniques of passive cancelation
for RCSR is presented including the structures formed by both conductor
and dielectric such as frequency selective surface, electromagnetic band
gap, artificial magnetic conductor, different types of metasurfaces, polarization
rotation reflective surface, and their combinations as hybrid techniques. A
section is allocated for comparison in which a comprehensive comparison is
drawn based on different characteristics of the structures, that is, the number
and thickness of substrate layers, complexity and cost, RCSR bandwidth and
level, their efficiency for TE and TM polarization, and their pros and cons.
Moreover, the standard simulation and measurement setups and different
kinds of optimization algorithms such as genetic algorithm, particle swarm
optimization, and so on applied for RCS are presented and described. Finally,
the conclusion, recommendations for future researches, and a trend of how
the topic is possibly moving forward to overcome the main challenges are
presented.
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