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Human Exposure to 5G Radiation: Challenges and Opportunities from Numerical Simulations

NOV
12
2020
12. NOV 2020

Lecture electronica Conferences > Wireless Congress > Session 9: 5G

11:30-11:55 h | Virtual

The deployment of the 5th Generation of telecommunications technologies brings in an unprecedented complexity and pervasiveness of wireless devices in everyday life. In terms of applications, 5G is expected to have a tremendous impact in business sectors as diverse as entertainment, transportation, healthcare, manufacturing, safety and security, logistic, energy, etc. Most of these applications directly concern user equipment, therefore with wireless devices close to human beings: smartphones, connected vehicles, medical equipment, augmented reality devices, etc. Furthermore, due to link budget limitations inherent to higher frequencies, a much higher density of infrastructures will be needed. Consequently, several situations can be foreseen in which 5G base-stations will have to be placed in urban or closed environments, hence much closer to people than what happens with current cellular infrastructure. The circumstances in which an assessment of human exposure to 5G electromagnetic fields is needed will become therefore more widespread and technically challenging than ever before. This novel scenario highlights on the one hand the limitations of purely measurement-based dosimetry, and on the other the potential of efficient EM simulation software. Particularly in the mm-waves range, single antennas will be replaced by arrays, leading to an exponential growth in the number of configurations to be scanned for a reliable exposure analysis. While an exhaustive experimental beam search for an array made of tens or hundreds of elements is hardly feasible, this can be effectively tackled by numerical algorithms, such as domain decomposition methods. Any rigorous exposure assessment should be carried on under operational conditions. However, in the 5G era this is often going to become problematic because applications like autonomous vehicles imply a massive integration of wireless devices onboard of cars, buses, etc. While in these cases it is virtually impossible to arrange a comprehensive measurement setup, innovative numerical techniques such as the combination of different EM solving methods can provide an exhaustive analysis with a reasonable allocation of time and resources. The importance of the interplay between measurement and simulation methods has gained broad recognition in the international community, as testified by the simultaneous and tightly related development of both measurement and simulation standards for human exposure assessment to 5G FR2 radiations. In this case, a new metric (incident Power Density) has been introduced at frequencies above 6 GHz (instead of SAR, which remains valid below 6 GHz). In our presentation, we will provide an overview of the main challenges related to human exposure assessment to 5G radiation, highlighting the importance of numerical approaches. The capabilities of state-of-the-art simulation solvers will be demonstrated by showing examples of SAR and Power Density evaluation on realistic test cases.

Subjects: Wireless

Speaker: Sergio Arianos

Type: Lecture

Speech: English

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The deployment of the 5th Generation of telecommunications technologies brings in an unprecedented complexity and pervasiveness of wireless devices in everyday life. In terms of applications, 5G is expected to have a tremendous impact in business sectors as diverse as entertainment, transportation, healthcare, manufacturing, safety and security, logistic, energy, etc. Most of these applications directly concern user equipment, therefore with wireless devices close to human beings: smartphones, connected vehicles, medical equipment, augmented reality devices, etc. Furthermore, due to link budget limitations inherent to higher frequencies, a much higher density of infrastructures will be needed. Consequently, several situations can be foreseen in which 5G base-stations will have to be placed in urban or closed environments, hence much closer to people than what happens with current cellular infrastructure. The circumstances in which an assessment of human exposure to 5G electromagnetic fields is needed will become therefore more widespread and technically challenging than ever before. This novel scenario highlights on the one hand the limitations of purely measurement-based dosimetry, and on the other the potential of efficient EM simulation software. Particularly in the mm-waves range, single antennas will be replaced by arrays, leading to an exponential growth in the number of configurations to be scanned for a reliable exposure analysis. While an exhaustive experimental beam search for an array made of tens or hundreds of elements is hardly feasible, this can be effectively tackled by numerical algorithms, such as domain decomposition methods. Any rigorous exposure assessment should be carried on under operational conditions. However, in the 5G era this is often going to become problematic because applications like autonomous vehicles imply a massive integration of wireless devices onboard of cars, buses, etc. While in these cases it is virtually impossible to arrange a comprehensive measurement setup, innovative numerical techniques such as the combination of different EM solving methods can provide an exhaustive analysis with a reasonable allocation of time and resources. The importance of the interplay between measurement and simulation methods has gained broad recognition in the international community, as testified by the simultaneous and tightly related development of both measurement and simulation standards for human exposure assessment to 5G FR2 radiations. In this case, a new metric (incident Power Density) has been introduced at frequencies above 6 GHz (instead of SAR, which remains valid below 6 GHz). In our presentation, we will provide an overview of the main challenges related to human exposure assessment to 5G radiation, highlighting the importance of numerical approaches. The capabilities of state-of-the-art simulation solvers will be demonstrated by showing examples of SAR and Power Density evaluation on realistic test cases.

Speaker

Sergio Arianos

Sergio Arianos

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Speaker

Sergio Arianos
Sergio Arianos

Location

Eingang
Nord-West
ICM
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Nord
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Atrium
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Freigelände
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