RegisterSpectral domain moment methodAssume a frequency selective surface of infinite extent and of periodic position of conductive elements. If such surface is illuminated by a plane wave, then even the distribution of induced currents is periodic. Since spectrum of periodic function is discrete, a continuous current distribution over conductive elements corresponds to the discrete spatial spectrum. Equation for discrete spectra can be simply rewritten to the matrix form, and matrix equations can be solved on the computer. Back
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