The aim of this thesis is to reduce the radar cross-section (RCS) for a wide bandwidth with high angular stability using an artificial magnetic conductor (AMC). Meta-surfaces are formed through the combination of two artificial magnetic conductor (AMC) cells arranged in periodic and randomized fashions in order to suppress the scattered fields in low levels in all directions as well as minimizing the maximum RCS of the metallic surface. The bandwidth limitations for a large range of incident angles are resolved by properly selecting of both AMC structures which are less sensitive to incident angles. By appropriate design of each AMC, and using equivalent circuit method, the reflection coefficients of these surfaces are designed in a way to reach 180 (±37 ? ) phase difference over a wide range of frequencies and incident angles. The bandwidth for 10dB mono-static RCS reduction is about 53% for both periodic and randomized structures at the normal incidence. It is illustrated that the randomized arrangement structure has 3dB lower maximum bi-static RCS compared to the periodic structure and the fractional bandwidth of 53% is reachable for bi-static RCS reduction larger than 10dB. Key Words Radar cross section, Frequency selective surface, Artificial magnetic conductor, Equivalent circuit model.
