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Theses

Contributions to fast and accurate antenna characterization

Abstract : This thesis deals with the characterization of antenna radiation patterns to improve the use of existing measurement systems. Two approaches are proposed in order to speed up the measurement of these radiation patterns, which is achieved by reducing the required number of field samples. The first one exploits the sparse spherical wave expansion of the field radiated by antennas. It only requires to know the maximum electrical dimension of the antenna. The second approach exploits the antenna external geometry and the measurement surface shape in order to build numerically an expansion basis tailored to the characterization problem. For both techniques, the minimal number of required field samples and an estimation of the field acquisition time at the IETR facilities are given, showing their potentialities to speed up the antenna measurements. Besides, an optimization strategy of the antenna positioning in post-processing is proposed. This procedure improves the quality of the reconstructed antenna radiation pattern from a given measurement. All the proposed methods have been validated using numerical and experimental datasets from various antenna types, different operating frequency bands and measured in several facilities, demonstrating thereby their versatility and generality.
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Theses
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https://tel.archives-ouvertes.fr/tel-03434344
Contributor : Abes Star :  Contact
Submitted on : Thursday, November 18, 2021 - 11:28:25 AM
Last modification on : Saturday, November 20, 2021 - 3:49:23 AM

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MEZIERES_Nicolas.pdf
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  • HAL Id : tel-03434344, version 1

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Nicolas Mézières. Contributions to fast and accurate antenna characterization. Electronics. Université Rennes 1, 2021. English. ⟨NNT : 2021REN1S039⟩. ⟨tel-03434344⟩

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