A STRATEGY TO AVOID THE TRUNCATION ERROR IN MEASUREMENTS USING PLANAR OR CYLINDRICAL NEAR-FIELD SCANNING SYSTEMS

摘要

A new method to avoid the truncation error in antennas near-field measurements is presented. The truncation problem is solved by picking up the information that is lost due to the finite size of scanning area, in points of the space reachable by the measurement system. The points are chosen in order to obtain a stable reconstruction of the field falling outside the available scanning area. The method can be applied to any scanning geometry, including the planar and cylindrical ones, whenever the set-up allows to vary the distance between the antenna under test (AUT) and the probe during the scanning procedure. Application of the method to cylindrical near-field scanning is numerically investigated, assessing the effectiveness of the proposed technique.