Metasurfaces for controlling scattering and radiative performance of antenna systems
Electromagnetic metasurfaces (MTSs), defined as electrically thin and dense two-dimensional
arrays of structural elements supporting electric or/and magnetic response, have proven their
capability to achieve an unprecedented control over the transmitted and reflected fields. In the last
years, there has been a strong interest in the investigation of the possibilities offered by MTSs in the
design of innovative antenna systems. In this framework, MTSs have been recently proposed as a
powerful platform to implement functional covers and superstrates able improving the performance
of existing antennas and/or providing novel and integrated functionalities. In particular, purely-
electric MTSs can be used to massively reduce the scattering signature of linear antennas, to
overcome mutual blockage effects and coupling between close radiators or to change their
resonance frequency. Similarly, magneto-electric MTSs may be used to tailor the radiation diagram
of dipole antennas transforming the original omnidirectional radiation diagram into a single- or
multi-beam pattern. The adding of electronic circuits within the metasurface unit-cell, such as PIN
diode, varactors, or more complex LC circuits, enables achieving power- and waveform- selective
features, which can be exploited in a wide range of practical scenarios, including
telecommunication, passive radar, sensing and space communication. Finally, the use of external
biasing network lies the foundations for introducing dynamic reconfiguration and cognitive features
in modern antenna systems.
In this talk, I will show how MTSs allow conceiving and implementing a new generation of
intelligent and cognitive antennas “feeling” the environment and adjusting their operation
accordingly. Particular emphasis is placed on the physical interpretations of the effects arising from
the interaction of antenna systems with metasurfaces, as well as on definition of effective design
schemes for the different applications. It is shown how such MTS-based smart antennas, also
referred to as smart antennas 2.0, are promising candidates for beyond-5G systems, where the use of
mm-waves introduces significant challenges due to their strong sensitivity to the environment.
Date and Time
Location
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- Date: 28 Nov 2024
- Time: 10:08 AM UTC to 11:30 AM UTC
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- Via Mesiano 77
- Trento, Trentino-Alto Adige
- Italy
- Building: Mesiano
- Room Number: 2R