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Coating with various radar absorbing materials (RAM) is an important technique in radar cross section (RCS) reduction of targets. In this paper, we develop an effective RCS calculation technique for composite coated targets. The targets are modeled as a combination of facets. Physical Optics (PO) method and Impedance Boundary Condition (IBC) are used for RCS calculation of coated facets. During the...
Recent advancements in the field of material science have created several novel materials whose electromagnetic (EM) properties make them ideal candidates for use as radar absorbing materials (RAM). The new types of RAM materials can be applied as very thin layers of paints and still maintain their absorption effectiveness making them ideal for radar cross section (RCS) reduction on aircraft, bridges,...
Detection of rocket and mortar firings, evaluation (calculation) of launching and impact points, then warning of troops deployed in the likely impact area are now major causes for concern for our forces in a theatre of operation. It is vital to seek out a solution offering a sensor for the protection against mortar in the short run. A radar alerter operating in UHF band could meet this requirement...
This letter investigates the application of EBG radar absorbing material (RAM) to asymmetric ridged waveguide slot antenna array to reduce its backward RCS. The EBG RAM is based on the mushroom-like EBG structure loaded with lumped resistances. A ridged waveguide slot antenna array with 4 times 10 slot elements was designed and built, part of the metal ground plane of the array is replaced with this...
The present article shows the results of ongoing works at AMR/IAE/CTA in the configuration of an experimental setting necessary to determine the error sources in radar cross section (RCS) measurements and hence minimize them by means of a system developed to measure targets in C- Band (6.0 GHz), in a closed environment, using an anechoic chamber. Microwave circuit techniques were employed aiming at...
The design and characterisation of radar absorbing material (RAM) is usually carried out under the assumption that the latter is in the form of a sheet of constant electrical or physical thickness. There are occasions, however, when this is not so. Although there is some discussion in the literature on scattering from impedance wedges, this is mainly concerned with edge diffraction effects. In this...
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