Quasi-optical beamforming techniques for millimeter-wave antenna systems in satellite and terrestrial communication networks
Recent developments in both terrestrial and non-terrestrial networks are focused on multiple beam and reconfigurable antenna systems as a mean to increase data rates and to provide more flexibility in resource allocation. Some synergies between space and terrestrial systems are emerging as the fifth generation (5G) of wireless systems introduce millimeter-wave frequencies for short range and indoor applications. This provides a unique opportunity for transfer of technology, as requirements for satcom user terminals and cell tower antennas present some similarities. While phased array antennas are getting a great deal of attention, their cost still remains high for mass market applications and alternative solutions based on simpler beamforming techniques are being considered. This talk will review well-known quasi-optical beamforming techniques and discuss their respective advantages and limitations. Recent developments, including practical demonstrations of novel lens concepts and the first in-orbit demonstration of reflectarray technology by a commercial equipment provider will also be presented. These antenna solutions, originally developed for space applications, may also find use cases in terrestrial networks.
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- 16 Rainforest Walk
- Monash University
- Clayton, Victoria
- Australia 3168
- Building: Theatre (Bldg 25)
- Room Number: Room S10
- Starts 03 September 2025 02:00 PM UTC
- Ends 23 September 2025 03:00 AM UTC
- No Admission Charge
Speakers
Dr. Nelson J. G. Fonseca of Anywaves
Biography:
Nelson J. G. Fonseca (Fellow, IEEE) received the M.Eng. degree from Ecole Nationale Supérieure d’Electrotechnique, Electronique, Informatique, Hydraulique et Télécommunications (ENSEEIHT), Toulouse, France, in 2003, the M.Sc. degree from the Ecole Polytechnique de Montreal, Quebec, Canada, also in 2003, and the PhD degree from Institut National Polytechnique de Toulouse – Université de Toulouse, France, in 2010, all in electrical engineering.
He currently works as Chief Innovation Officer with Anywaves, Toulouse, France, contributing to the development of their custom space-segment antennas portfolio. He is also the founding Director of 3SPACE Innovation, Paris, France, a startup developing novel ground-segment and terrestrial wireless communication antenna systems. He has authored or coauthored more than 330 papers in peer-reviewed journals and conferences, and has more than 50 patents issued or pending. His research interests include multiple beam antennas for space missions, beamformer theory and design, ground terminal antennas and novel manufacturing techniques.
Dr. Fonseca is an Associate Editor for IEEE Transactions on Antennas and Propagation, and the IET Microwaves, Antennas and Propagation. He is also a Topic Editor of IEEE Journal of Microwaves. He was an Associate Editor for IEEE Transactions on Microwave Theory and Techniques from 2020 to 2022. He was also a Guest Editor of two Focused Issues on Microwave Aerospace Applications for IEEE Microwave Magazine in 2022 and 2023. He was the Vice-Chair (2020-2021) and Chair (2022-2023) of the IEEE MTT-S Technical Committee on Microwave Aerospace Systems (TC-29). He was also the Vice-Chair of the 19th European Conference on Antennas and Propagation (EuCAP2025). He was the recipient of several prizes and awards, including the Best Applied Technology Antenna Paper Award at EuCAP 2022 and the 2024 IEEE journal of microwaves Best Paper Award.
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