WIDEBAND COMPOSITE AMC SURFACES FOR RCS REDUCTION

A composite artificial magnetic conductor (AMC) surface is presented for wide band radar cross section (RCS) reduction. The composite surface consists of two kinds of AMC cells with different resonance frequencies. The phase difference between them can be tuned to be within a range close to +/-pi over a wide bandwidth. Therefore, the reflections from these two different AMC cells cancel each other. The basic principle was discussed and a sample was measured. The results show that a nearly 10 dB RCS reduction was achieved with a 32% bandwidth. (C) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53: 712-715, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25835