Contactless Characterization of Miniature and Buried Antennas Within Reverberation Chambers

Job title:

Contactless Characterization of Miniature and Buried Antennas Within Reverberation Chambers

Company:

Job description

Offer DescriptionSupervisionFrançois Sarrazin: Junior Professor Chair at Université de RennesPhilippe Besnier: Research Director at CNRSKeywords: Antenna characterization, Miniature antenna, Reverberation chamberContext: Smart cities rely on the use on wireless sensor networks to ensure monitoring activities for a large panel of applications: structural health, soil composition, air, and water quality… Sensors are therefore either in contact or embedded within a lossy medium such as concrete, soil or water. Such complex environment in the sensor’s vicinity implies a degradation of the radio performances, and particularly a decrease in the antenna radiation efficiency. The estimation of such efficiency, critical parameter to limit power consumption, is barely possible with conventional measurement methods in the case of buried and miniature antennas. Indeed, conventional measurement approaches necessitate to connect the antenna under test to an analyzer whereas the presence of the cables in the antenna reactive near-field zone disturbs the radiation and impedance properties [1]. In that context, innovative efficiency measurement methods are required to overcome current limitations of conventional methods.Objectives and Work Plan: Reverberation chambers (RCs) have become a reliable alternative to anechoic chambers to perform antenna radiation pattern [2] and efficiency measurement [3]. The objective of this PhD is to develop a contactless antenna measurement method suitable for low efficiency and buried antennas, based on our recent proof-of-concept [4]. The work plan is the following:

• Develop new analytical models of antenna scattering and absorbing properties within reverberation chambers.
• Develop the measurement protocol and test bench to retrieve antenna parameters from non-invasive scattering parameters measurements.
• Validate the approach first in a free-space scenario and then for antennas buried in a complex medium.
• Evaluate the measurement uncertainties regarding the antenna and RC properties.

PhD Working Environment: The PhD will take place at the IETR – UMR CNRS 6164 ( ) on the Beaulieu campus of the Université de Rennes, France. The PhD student will join the eWAVES team and will benefit from the group expertise as well as IETR’s world-class technological platforms including M2ARS and COSQ.Applicant ProfileEducation level: Master or equivalent degreeBackground: electrical engineering, wave physics, signal processingLanguage: English or French (French is not required)Practical Details and ApplicationStarting date: 2024 October 1stSalary: about €1700 net per monthHow to apply: send a resume, cover letter, and last academic transcriptsBibliography[1] T. Fukasawa, N. Yoneda and H. Miyashita, Investigation on Current Reduction Effects of Baluns for Measurement of a Small Antenna, IEEE Trans. Antennas Propag., vol. 67, no. 7, pp. 4323-4329, July 2019, doi: 10.1109/TAP.2019.2911360.[2] A. Reis, F. Sarrazin, P. Besnier, P. Pouliguen and E. Richalot, Contactless Antenna Gain Pattern Estimation From Backscattering Coefficient Measurement Performed Within Reverberation Chambers, IEEE Trans. Antennas Propag., doi: 10.1109/TAP.2021.3111184.[3] A. Hubrechsen et al., The Effect of Noise on Reverberation-Chamber Measurements of Antenna Efficiency, IEEE Trans. Antennas Propag., vol. 69, no. 12, pp. 8744-8752, Dec. 2021, doi: 10.1109/TAP.2021.3083822.[4] W. Krouka, F. Sarrazin, J. de Rosny, A. Labdouni and E. Richalot, Antenna Radiation Efficiency Estimation From Backscattering Measurement Performed Within Reverberation Chambers, IEEE Trans. Electromagn. Compat., doi: 10.1109/TEMC.2021.3129912.Funding category: Contrat doctoral1700€ net pr monthPHD Country: FranceRequirementsSpecific RequirementsEducation level: Master of equivalent degree in electrical engineering or physicsBackground: wave physics, electromagnetic compatibility, signal processingLanguage: French is not requiredAdditional InformationWork Location(s)Number of offers available 1 Company/Institute Université de Rennes Country France City Rennes GeofieldWhere to apply WebsiteContact WebsiteSTATUS: EXPIRED

Expected salary

€1700 per month

Location

Rennes, Ille-et-Vilaine

Job date

Fri, 17 May 2024 05:41:27 GMT

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