Compressed Sensing Based Spherical Mode Filtering Reflection Suppression for Far-Field Testing in Complex Electromagnetic Environments

This paper presents the first investigation of a two-dimensional, compressed sensing based spherical mode filtering reflection suppression technique for far-field antenna measurements when applied in a complex electromagnetic environment, e.g. when the test antenna is in the presence of a an electrically large parasitically coupled scatterer. Such scatterers inevitably influence measurement results including radiation pattern, cross-polarisation level, gain, directivity, etc., and are of particular concern when testing in a far-field mode; and especially so when testing outside. Through a massive numerical simulation which utilised a proprietary full-wave, three-dimensional, computational electromagnetic solver, the viability of this new processing technique has been verified, with preliminary results showing that the technique is valid even under such complex scattering conditions.