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On the Application of Sparse Spherical Harmonic Expansion for Fast Antenna Far-Field Measurements

Abstract : The characterization of 3-D antenna radiation patterns is time-consuming. The field acquisition duration can be dramatically reduced by leveraging the sparsity of the radiated field spectrum into spherical harmonic basis. Only a small number of measurements points are then necessary to identify the few significant spherical coefficients describing accurately the antenna pattern. In practice, this compressed sensing-based procedure requires carefully chosen settings to work efficiently. The fitting to the data and the field sampling strategy are two crucial points in order to ensure a successful fast antenna measurement procedure. The techniques with experimental validations are proposed to ensure a reliable field interpolation. Estimations of savings in acquisition time are also provided to show the interest of the proposed method.
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Submitted on : Friday, June 12, 2020 - 3:35:52 PM
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N. Mezieres, Benjamin Fuchs, Laurent Le Coq, J.-M. Lerat, R. Contreres, et al.. On the Application of Sparse Spherical Harmonic Expansion for Fast Antenna Far-Field Measurements. IEEE Antennas and Wireless Propagation Letters, Institute of Electrical and Electronics Engineers, 2020, 19 (5), pp.746-750. ⟨10.1109/LAWP.2020.2978170⟩. ⟨hal-02865296⟩

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