Mission :

Since the late 1990s, wireless sensor networks emerge as a key technology for numerous applications (domestic, health, environmental, industrial, military, …) and especially for SHM (Structural Health Monitoring).

In the 2000’s a new class of wireless sensors based on electromagnetic transducers appeared, combining radiofrequency (RF) MEMS technologies and wireless sensors technology. The sensors are mainly composed of a variable impedance or microwave resonator connected to an antenna which can be remotely interrogated from radars. Several concepts are possible to fabricate the sensor from changing the size, the RF properties of the material used for the devices or controlling the coupling between different parts of the devices by monitoring, for example, the displacement of a fluid. The main advantages of such wireless chipless and passive sensors are (1) the complete autonomy (no power consumption and no embedded battery), (2) the large reading range (several tens of meters), (3) the compactness of the devices used at 24GHz and 77GHz, (4) the possible use in harsh environments and (5) the large domain of physical and chemical applications.

CNRS-LAAS (MINC team) was among the first laboratories in the world to investigate this new kind of sensors. This laboratory has already validated several original concepts (operating at 24GHz) for pressure, temperature, stress and nuclear radiation transducers [1-2] but also, Frequency-Modulated Continuous-Wave radar for the wireless localization, identification and reading of these passive sensors [3-4].

Several funded projects started in 2015 in collaboration with industrial partners. Two engineers are today involved in these projects mainly for material and technological aspects. We are now looking for a novice engineer with RF competences for design and characterization.

Profil des candidats :

Design of microwave circuits using commercial electromagnetic software (such as HFSS and ADS)
Microwave characterization of circuits using on Network Analyzers
Radar measurement (optional)

Start of job :

June /September 2017

Duration :

12 to 24 months

Salaire :

≥ 25 et < 35 K€ brut annuel

Laboratore :

Laboratoire d’Analyse et d’Architecture des Systèmes

Work place :

Toulouse – France

Field:

Informatique, électronique – Electronique, photonique, optique appliquée

Contact :

Patrick PONS (ppons@laas.fr) or Hervé AUBERT (aubert@laas.fr)

Reference

[1] P. Pons, H. Aubert, M. Tentzeris, “Overview of Electromagnetic Transducers with Radar Interrogation for Passive Wireless Sensors Applications”, International Conference on Microwaves, Radar and Wireless Communications (MIKON), June 16-18 2014, Gdansk, Poland
[2] E Debourg, A Rifai, H. Aubert, I. Augustyniak, P. Knapkiewicz, J. Dziuban, M. Matusiak, M.Olszacki, P.Pons, “High doses wireless radiation sensor using electromagnetic transducers”, European Microwave Week, 6-11 Sept 2015, Paris
[3] H. Aubert, F. Chebila, M. Jatlaoui, T. Thai, H. Hallil, A. Traille, S. Bouaziz, A. Rifaï, P. Pons, P. Menini, M. Tentzeris, “Wireless Sensing and Identification based on RADAR Cross Sections Variability Measurement of Passive Electromagnetic Sensors”, Annals of telecommunications, vol. 68, no7-8, Aug 2013, pp. 425-435
[4] D. Henry, H. Aubert, P. Pons, “3D Scanning and Sensing Technique for the Detection and Remote Reading of a Passive Temperature Sensor,” IEEE International Microwave Symposium, 22-27 May 2016, San Francisco, California, USA.

News Reporter
Dr. Lu

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