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Theses

Contribution à la calibration des antennes actives pour applications radar

Abstract : The main goal of this thesis is to develop a new active antennas calibration method for radar application. The calibration method takes into account the edge effects and the coupling between the antenna radiating elements. Moreover, this method allows avoiding the degradations of the antenna radiation pattern caused by mismatch produced during a scanning and/or a weighting process. HFSS software is used to provide near-field electromagnetic numerical simulations. Matlab is used for far-field calculation from the near-field data; and also for the calculation of the illumination on the antenna surface by back-propagation of far-field datas. The calibration process is performed by an optimization process by means of ADS software. An equivalent schematic is built in it, in order to obtain desired radiation pattern which corresponds to the illumination on the antenna surface. The presented approach allows full simulation of RF circuits and radiation of the antenna array together and to get the calibration coefficients automatically. The model can be applied to the real antennas in order to get the desired pattern. The antenna equivalent model can be improved by adding RF schematic in it.
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https://pastel.archives-ouvertes.fr/tel-03421560
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Submitted on : Tuesday, November 9, 2021 - 4:17:20 PM
Last modification on : Wednesday, November 10, 2021 - 3:10:47 AM
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  • HAL Id : tel-03421560, version 1

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Taguhi Chalumyan. Contribution à la calibration des antennes actives pour applications radar. Electromagnétisme. Télécom ParisTech, 2017. Français. ⟨NNT : 2017ENST0032⟩. ⟨tel-03421560⟩

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