PhD Offer : PHOTOMIXING ANTENNA ARRAYS FOR TERAHERTZ WIRELESS COMMUNICATIONS AT IETR

Sabrina DOMARE À la une, Offres de thèse

Context

Wireless data traffic increases by a factor of 100 every 10 years and, in 10 years’ time, we will have to provide data rates of even Tb/s. Given Shannon’s limit, a more efficient use of available spectrum will not suffice to reach the predicted data rates. The use of carrier frequencies in the sub-Terahertz (sub-THz) regime (between 100 GHz and 1 THz) will be pivotal to achieve the total bandwidths (BWs) required for front- and back-hauling in beyond 5G systems, ultra-high definition multimedia streaming and data centers. Moreover, sub-THz frequencies have not yet been allocated and they pre- sent atmospheric transmission windows with attenuation below 10 dB/km. To enable the use of this frequency band, we will need adequate front-ends with high gain and beam steering capabilities to receive/transmit efficiently in point-to-point and point-to-multipoint scenarios.

Objectives

The overall objective of this thesis will be to develop sub-THz front-ends by photonic generation with several disruptive proofs of concepts at international level:

  • –  One of the first high-gain photomixing antenna array with broad bandwidth. We will investigate the integration of UTC-photodiodes with planar wideband antennas. Special attention will be paid to find the most appropriate materials and fabrication techniques for these arrays.
  • –  The developed photomixing arrays will also provide beam steering capabilities. By bringing one fiber to each photodetector, it is possible to control the phase of each element with true time delay and provide either beam steering or multiple beams.
  • –  Implement currently developed dual frequency optical sources to achieve the sub-THz carrier compatible with photo-mixer arrays.
  • –  Last but not least, the realized prototypes will be measured at IETR/Institut Foton facilities, and real-time high data rates over medium or long distances in point-to-multipoint scenarios.

Candidate

  • Required education level: Master or equivalent degree in electrical engineering, photonics or physics. Duration: 36 months.
  • Required background: antenna theory, microwave engineering, microwave photonics, Terahertz radia- tion. Knowledge of French is not required.

Contacts

Prof. Mehdi ALOUINI

Prof. Ronan SAULEAU

Dr. David GONZÁLEZ OVEJERO

Dr. Cyril Paranthoen

More informations

Here