Abstract
Radar is a delicate detection device and since its evolution different techniques for reducing electromagnetic reflections have been discovered. This paper provides a concise review on fundamentals of absorption which reduce radar cross section from stealth target with which radar cross section affects the survivability and mission capability. The reduction of radar cross section depends on dielectric and magnetic properties of the material. The first section reviews the Radar Absorbing Material (RAM) in order to provide a background on fundamentals, various stealth techniques for absorption and its properties at microwave frequencies. The second section reviews the Multi-Walled Carbon Nanotubes and their different composites by encapsulation of other metals, polymers or epoxies into it and its microwave absorption properties were studies at microwave frequencies. Multi-Walled Carbon Nanotubes based composites for microwave absorption are reviewed on the basis of various factors; material composition, reflection loss performance, thickness, complex permittivity, complex permeability, dielectric tangent loss, magnetic tangent loss, bandwidth, and frequency band.
Keywords: Radar Absorbing Material (RAM), carbon nanotubes (CNTs), microwave absorption, reflection loss, thickness, bandwidth.
Graphical Abstract
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