A5075330242- Antenna Design and Analysis
- Advanced Antenna and Metasurface Technologies
- Metamaterials and Metasurfaces Applications
- Electromagnetic Compatibility and Measurements
- Full-Duplex Wireless Communications
- Energy Harvesting in Wireless Networks
- Indoor and Outdoor Localization Technologies
- Wireless Communication Networks Research
- Speech and Audio Processing
- Force Microscopy Techniques and Applications
- Advanced Optical Imaging Technologies
- Millimeter-Wave Propagation and Modeling
- Antenna Design and Optimization
Sorbonne Université
2017-2019
National University of Singapore
2019
Université Paris Cité
2017
Institut de Microélectronique, Electromagnétisme et Photonique
2015-2017
This paper deals with the design of tensorial modulated metasurfaces able to implement a general radiating aperture field distribution. A new synthesis approach is introduced, based on local holography and variable impedance modulation. In particular, it shown that can be used generate distribution (phase amplitude). addition, step by algorithm presented. order validate method, several solutions are presented at 20 GHz which distributions radiate different beams polarization.
This communication presents an experimental validation of a previously developed method for the generation aperture field distributions using modulated tensorial metasurfaces. The is performed through design two novel antennas working at frequency 9.5 GHz: both broadside circularly polarized antenna and four-beam having radial Hamming amplitude law. manufactured metasurfaces are composed subwavelength "camembert"-shaped patches printed over grounded dielectric substrate. Radiation patterns...
The generation of several beams with strict radiation requirements in the near field a radiating aperture is demonstrated here.An optimization scheme adopted to derive distribution generating required nearfield radiation.The tool based on set-theoretic approach and takes into account constraints profile polarization.The challenging case four independent different polarizations then considered.A tensorial metasurface synthesize derived fully control amplitude phase aperture.Measurement...
This paper presents a procedure for the design of tensorial metasurface antennas radiating polarized beams through aperture field synthesis. The is generated using surface wave to leaky conversion resulting from modulation. feeder presented with description geometrical parameters affecting antenna matching. Numerical solutions single beam and multi-beam working respectively, at 12.25 20 GHz are presented. In addition, prototype manufactured measured.
This paper introduces a rigorous and fast procedure for accurate assessment of the peak averaged specific absorption rate (SAR), quantifying user exposure to electromagnetic field radiation from new-radio communication devices. Focus is lent class equipment that exploit multiple-input multiple-output (MIMO) technology using exclusive simultaneous excitations active antenna-array system, such as expected on 5G In contrast with required N(N-1)+1 measurements traditional SAR systems only take...
This paper presents a procedure for generating radiating aperture fields using tensorial metasurfaces. The field is generated surface wave to leaky conversion resulting from metasurface modulation. Amplitude and phase control are achieved varying modulation parameters holography principle respectively. In order validate the design procedure, numerical solution presented multi-beam antenna working at 20GHz.
This paper introduces a novel approach for the measurement of time averaged Specific Absorption Rate (SAR) multiple emitting antennas. The proposed is based on use phase information E-field phasor given by radiofrequency vector SAR system, retrieval instantaneous input RMS power injected in antennas from small number points. presented case two Numerical validation was performed dipole radiating coherently at single frequency.
This article introduces a measurement methodology for the evaluation of specific absorption rate (SAR) MIMO systems (multiple-input and multiple-output) in which relative phases between antennas are rapidly changing very short durations.
This paper introduces a measurement system architecture for <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Specific</i> xmlns:xlink="http://www.w3.org/1999/xlink">Absorption</i> xmlns:xlink="http://www.w3.org/1999/xlink">Rate</i> (SAR) assessment in the context of RF exposure reduction. Focus is brought on two reduction technologies: Proximity Sensing and Time averaged SAR (TAS). The proposed mainly based use vector-phasor probe array, combined...