Abstract
The framework of our work is the application of a fast method to estimate the radiation pattern of an antenna from the measurement of the electric-fleld magnitude in the near-fleld region using infrared (IR) camera. IR acquisition techniques allows quasi- realtime measurements of the magnitude of the electrical fleld on planar surfaces in near-fleld conditions. However the antennas radiation patterns can only be estimated from near-fleld electrical magnitude and phase measurements. Consequently a classical plane to plane iterative phase retrieval process has been developed and tested with respect to a large number of conflguration parameters such as to flnd an optimal conflguration on a wide frequency range (0.5{20GHz). In order to achieve and validate such a study, some comparisons have been performed on data obtained either by numerical simulation or classical near-fleld technique based upon radio-frequency (RF) probe scanning on simple horn antennas. Among all the studied parameters we will focus onto the in∞uence of the dynamic range of the measurements on the reconstructed radiation patterns and on validations from experimental results.
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