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Several approaches in the literature have been attempted for reducing the radar cross-section (RCS) of antennas, specifically for planar patch antennas. Ideally, the antenna should function unimpeded at the communication frequency, but should have a minimal radar signature at all other frequencies of interest. Here, absorbing frequency selective surfaces (FSSs) are used as the ground plane of a planar...
We present an efficient method for modeling 3-D doubly periodic structures over a wide frequency range based on hybrid finite element/boundary integral (FEBI) methods. The 3-D periodic structures can be represented as non-orthogonal lattices composed of inhomogeneous bianisotropic media with arbitrary metallic patches. Triangular prismatic volume elements were utilized to mesh the unit cell, which...
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