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Detailed uncertainty analysis of the electrically small antenna efficiency measurement

Publié le 29 mars 2018
Detailed uncertainty analysis of the electrically small antenna efficiency measurement
Auteurs
Kaddour A.S., Benabdallah E., Bories S., Delaveaud C., Bellion A.
Year2017-0099
Source-TitleAMTA 2016 Proceedings
Affiliations
CEA, LETI, MINATEC Campus, Univ. Grenoble-Alpes, Grenoble, France, CNES, 18 Avenue Edouard Belin, Toulouse, France
Abstract
Radiation efficiency is a key performance indicator for multi-standards frequency agile electrically small antennas (ESA) that are mounted on wireless IoT sensors. One of the techniques to estimate it, consists to integrate, over all the angular directions, the gain measured in the far field condition. The gain-comparison method is usually implemented in the CEA LETI test bench, which requires an accurate knowledge of the standard horn gain. The introduction of a new RF-optical link to remove coaxial cable perturbation on ESA radiation, in our test bench has raised the opportunity to proceed to an error budget analysis. This paper delivers the main results of this study where the impact of several parameters such as the optical fiber movement, the horn positioning, the received power level, and the chamber imperfection have been evaluated. The three antennas method (one Vivaldi and two TEM standard horns) is carried on to estimate the complex transfer function of the three antennas. The overall goal is to estimate the detailed uncertainty analysis of the ESA efficiency measurement over a large frequency band. This work aims to identify the most impacting effects on uncertainty and to initiate the discussion with the AMTA community how to decrease them. © 2016 AMTA.
Author-Keywords
electrically small antennas ESA, Radiated efficiency, RF-optical link, uncertainty
Index-Keywords
Antennas, Benchmarking, Budget control, Efficiency, Frequency bands, Optical fibers, Optical links, Radiometry, Complex transfer functions, Efficiency measurement, Electrically small antennas, Far-field conditions, Key performance indicators, Radiation efficiency, Received Power Levels, uncertainty, Uncertainty analysis
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