Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Design of Dual Band Stacked Metasurfaces Using Integral Equations   An integral equation-based approach for the design of dual band stacked
metasurfaces which are invariant in one-dimension is presented. The stacked
metasurface will generate collimated beams at desired angles in each band upon
reflection. The conductor-backed stacked metasurface consists of two
metasurfaces (a patterned metallic cladding supported by a dielectric spacer)
stacked one upon the other. The stacked metasurface is designed in three
phases. First the patterned metallic cladding of each metasurface is
homogenized and modeled as an inhomogeneous impedance sheet. An Electric Field
Integral Equation (EFIE) is written to model the mutual coupling between the
homogenized elements within each metasurface, and from metasurface to
metasurface. The EFIE is transformed into matrix equations by the method of
moments. The nonlinear matrix equations are solved at both bands iteratively
resulting in dual band complex-valued impedance sheets. In the second phase,
optimization is applied to transform these complex-valued impedance sheets into
purely reactive sheets suitable for printed circuit board fabrication by
introducing surface waves. In the third phase, the metallic claddings of each
metasurface are patterned for full-wave simulation of the dual band stacked
metasurface. Using this approach, two dual band stacked metasurfaces are
designed

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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: cond-mat
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The categories of this paper are: math-ph
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The categories of this paper are: hep-th
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: chem-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: hep-ex