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We deal with efficiently computing the far-field radiation/scattering by volumetric sources/objects. The approach consists of three steps: first, representation of “nonuniformly sampled” Fourier exponentials by a finite number of “uniformly sampled” ones, with such number controlling the accuracy; second, “pruned” fast Fourier transform; and third, interpolation, again with controlled accuracy, of...
We discuss one of the computationally most critical steps of the Phase-Only synthesis of aperiodic reflectarrays, namely the fast evaluation of the radiation operator. We present its implementation by using a 2D Non-Uniform FFTs (NUFFTs) of NED (Non-Equispaced Data) type on Graphic Processing Units (GPUs) in Compute Unified Device Architecture (CUDA) language. We also illustrate the programming strategies...
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