Application of Phase-Space Filters to Planar Near-Field Antenna Measurements

摘要

Phase-space expansion of spatial near-field data is an expansion into functions that are spatially and spectrally localized. We have previously shown that such a phase-space representation (PSR) can be useful for both antenna radiation phenomenology and evaluating the quality of planar near-field measurements. In this paper, we use the coefficient of a phase-space expansion for filtering. It will be shown that the contribution of some error components is stronger in a particular region of the phase-space. One can take advantage of this fact for phase-space filtering. Two sources of error, namely staggered data grid, and AUT-room interaction; are considered in this paper. For imperfect probe spacing, we shall show that this technique is particularly attractive when the true probe location is unavailable. In the second example, we shall show that the PSR filtering can reduce the side lobe contamination due to AUT/room interactions.