Bader Fetouri, Ph.D.

Sales Engineer & RF Exposure Expert

Lillybelle is a telecommunications company that provides QoS/QoE drive test tools and services. Lillybelle is the official distributor of Narda, Alphawave, Accuver, PCTEL products in France and some African countries.

Managed mobile networks operators accounts, optimizing product utilization and maximizing customer satisfaction.

Provided technical support to sales engineers and customers. Advised customers on best solutions to their needs.

Provided technical training to customers in RF exposure mitigation, propagation models, and telecommunications in general.

Increased sales revenue by implementing cross-sell and upsell strategies for RF-EMF exposure clients.

Results: available on demand.

Service Delivery Manager & Senior Telecom Engineer

Lillybelle is a telecommunications company that provides QoS/QoE drive test tools and services. Lillybelle is the official distributor of Narda, Alphawave, Accuver, PCTEL products in France and some African countries.

Worked as Service Delivery Manager for RF exposure evaluations, leading efforts to resolve compliance issues that were delaying 5G rollouts. Oversaw a team comprising one RF engineer and two 3D designers to ensure timely and accurate remediation of RF exposure boundary violations.

Developed and implemented solutions that streamlined RF exposure evaluations, significantly reducing turnaround time while meeting client requirements.

Provided presales support for Lillybelle’s RF exposure evaluation services, contributing to client engagement and solution adoption.

Acted as a technical expert in RF exposure, advising Lillybelle’s clients on the use of Narda products and IXUS software for RF compliance and evaluation.

Results: achieved the successful deployment of 115 previously delayed 5G radio sites by resolving non-compliant RF exposure boundary issues.

RF Exposure Study Lead

Worked as RF exposure studies lead, at Bouygues Telecom’s regulatory affairs department. Assessed public’s and workers’ exposure to RF antennas (2G to 5G) using simulations (IXUS and EMF Visual).

Results: unblocked 45 sites deployments by proposing adjustments to make them compliant with RF exposure limits. Worked as technical referent when Bouygues Telecom decided to subcontract the RF exposure assessment work to Lillybelle.

Studied the impact of field averaging in reducing compliance boundaries of multi-band base stations (2G to 5G).

Result: Bouygues Telecom’s internal specifications now reflect a reduction in antenna compliance boundaries. Complete information available on demand.

Evaluated near-field exposure to multi-band base stations (2G to 5G) using MS Excel.

Performed EMF measurements near mobile base stations to assess workers exposure to 4G emissions with extrapolation to maximum power. Performed EMF measurements to better understand the power control features of 5G base stations at 3.5 GHz and 26 GHz. Measurement equipment: Alphawave FieldSense for RF security, Narda NBM-520, Narda SRM-3006, Keysight Fieldfox.

Consultant and Research Specialist

Worked as a consultant for Bouygues Telecom on RF exposure assessment projects.

Worked on RF exposure assessment in the near-field with the Mantu Lab.

Result: publication at the 2023 MISTA conference.

Worked on RF exposure compliance boundaries reduction using spatial averaging with the Mantu Lab.

Result: publication at the 2023 SCC conference

Reviewer and session chair for MISTA2023 and SCC2023 conferences.

Ph.D. researcher

Studied: Workers’ exposure to FM antennas in radio towers. Electromagnetic fields modelling using CST and MATLAB, dosimetry simulations using the FDTD method on linux (NUFDTD).

Modelled FM sources for FDTD simulations. Did specific absorption rate (SAR) simulations on homogenized human models.

Results: developed a new methodology for near-field exposure assessment, proposed models obtained using machine learning to estimate SAR values from electric field in V/m. Publication of 2 conference papers and journal paper.

Publications: BioEM2019 conference, URSI GASS 2020 conference, Bioelectromagnetics journal article (Wiley).

Engineering Apprentice

Worked in the Mobile Networks CTO Business Unit on RF exposure mitigation projects.

Analyzed RF exposure compliance boundaries for 4G and 5G Nokia equipment using MS Excel and EMF Visual. Wrote compliance reports for internal use and Nokia’s clients.

Evaluated LTE/4G Small Cell uplink and downlink EMF exposure; automated data processing using Excel and VBA.

Analyzed indoor and outdoor exposure to 4G and 5G equipments using 3GPP pathloss models.

Result: impact of small cells deployment on RF exposure mitigation. The work was published in EuCAP'17.

Institut Polytechnique de Paris - Telecom Paris

Completed a total of 100 hours of courses in electromagnetic fields modelling, scientific writing, statistics, machine learning.

Ph.D. manuscript can be accessed here. Ph.D. defense video is available here.

Université Paris-Saclay

Courses included electromagnetic fields simulation and modelling, terahertz semiconductors, RF electronic circuits.

Thesis: Small cells and 5G massive MIMO antennas RF exposure indicators.

Institut Polytechnique de Paris - Telecom Paris

Courses included communication systems, antennas, propagation, radio coverage, digital communications.

Thesis: Small cells and 5G massive MIMO antennas RF exposure indicators.

Journal

Doctoral Dissertation

Conferences

Reviewer