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The surface current density, Jz, on the open PEC shell determined analytically (Matlab) and numerically (COMSOL Multiphysics) as a function of φ for the configuration A (a) and B (b). The PEC shell extends over the interval ∈[45 ° , 315 ° ], i.e., having an aperture extent 2θ = 90°.
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