Picking the Pattern for a Stealth Antenna A frequency selective surface that acts as an RF filter and helps reduce the radar cross section of antennas consists of a pattern of geometrical objects. There are literally thousands of possibilities, and testing each one physically would take enormous amounts of time. With simulation, though, we can find promising candidates in just minutes. BY FRANCESCA DE VITA, SIMONE DI MARCO, FABIO COSTA AND P

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