Adverse Impacts of 5G Downlinks on Human Body

2019 · Harm · Insufficient evidence

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HarmInsufficient evidencePaper 1568

Study snapshot

Publicationmanual · 2019

Study typeengineering

Reported directionHarm

Evidence ratingInsufficient

Abstract

Adverse Impacts of 5G Downlinks on Human Body Nasim I, Kim S. Adverse Impacts of 5G Downlinks on Human Body. 2019 SoutheastCon. Huntsville, AL. 11-14 April 2019. DOI: 10.1109/SoutheastCon42311.2019.9020454 Abstract The increasing demand for higher data rates and uninterrupted reliable service have made the frequency spectrum above 6 GHz a very promising candidate for future wireless communications because of its massive amount of raw bandwidth and extremely high data transfer capabilities. However, increasing concerns of communications at high frequencies on human health have gained international alarm that suggests more research before it is deployed successfully. In this context, this paper aims to investigate the human electromagnetic field (EMF) exposure from fifth-generation (5G) downlink communications and compare its impacts with the present cellular technologies considering the features that the 5G systems will likely adopt. Our simulation results suggest that while the impacts from 5G beamforming communications cross the regulatory borders at downlinks for a very short range between base stations (BSs) and user equipment (UE), the exposure level remains on a high throughout the entire network compared to the present systems. Also, this paper urges for more research on the exposure level from future communications to determine any possible threats below the existing guidelines. This paper also highlights the significance of considering SAR for the measurement of exposure compliance in downlinks. Excerpt ... this paper urges the regulatory authorities to set SAR guidelines for 5G systems at far-field exposure also for frequencies above 6 GHz. Also, the minimum AP-UE [access point - user equipment] distance should be maintained at least 6 m [meters] for 5G and further space should be left for a conservative operation regarding human safety. Conclusions This paper has highlighted the significance of the human EMF exposure issue in the downlink of a cellular communications system. This paper measured the exposure level in terms of PD and SAR and compared them to those calculated in the 3.9G and 4G specifications. Distinguished from the prior art that studied uplinks only, this paper has found that the downlinks of a 5G can also yield a higher level of emissions in terms of SAR compared to concurrent cellular systems. Our results emphasized that this increase stems from more highly concentrated EMF energy per downlink RF beam due to the use of larger phased arrays within small cells of a 5G network. However, only skin effects are being taken into consideration for simplicity. This paper has also suggested the minimum AP-UE distance for human safety in cellular communications at high frequencies such as 28 GHz. To this end, this paper urges to investigate any possible threats at the exposure level shown in this work for future 5G systems before it is finally globalized. ieeexplore.ieee.org

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeengineering

Effect directionharm

PopulationNot supplied

Sample sizeNot supplied

ExposureRF

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Simulation results suggest 5G downlink beamforming impacts can cross regulatory limits at very short range between base stations/access points and user equipment, and that exposure levels remain higher throughout the network compared with present systems (3.9G/4G). The paper emphasizes SAR/PD-based compliance assessment for downlinks and proposes maintaining a minimum AP-UE distance of at least 6 m for 5G at high frequencies (e.g., 28 GHz).

Outcomes measured

EMF exposure (downlink)
Specific absorption rate (SAR)
Power density (PD)
Regulatory compliance / guideline exceedance
Minimum access point–user equipment (AP-UE) distance recommendation

Limitations

Based on simulations (not human/clinical measurements).
Only skin effects were considered for simplicity.
Specific exposure parameters (e.g., exact SAR/PD values, durations) are not provided in the abstract/excerpt.

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": "RF",
    "source": "base station",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "EMF exposure (downlink)",
    "Specific absorption rate (SAR)",
    "Power density (PD)",
    "Regulatory compliance / guideline exceedance",
    "Minimum access point–user equipment (AP-UE) distance recommendation"
  ],
  "main_findings": "Simulation results suggest 5G downlink beamforming impacts can cross regulatory limits at very short range between base stations/access points and user equipment, and that exposure levels remain higher throughout the network compared with present systems (3.9G/4G). The paper emphasizes SAR/PD-based compliance assessment for downlinks and proposes maintaining a minimum AP-UE distance of at least 6 m for 5G at high frequencies (e.g., 28 GHz).",
  "effect_direction": "harm",
  "limitations": [
    "Based on simulations (not human/clinical measurements).",
    "Only skin effects were considered for simplicity.",
    "Specific exposure parameters (e.g., exact SAR/PD values, durations) are not provided in the abstract/excerpt."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "5G",
    "downlink",
    "beamforming",
    "phased arrays",
    "small cells",
    "base station",
    "user equipment",
    "EMF exposure",
    "SAR",
    "power density",
    "28 GHz",
    "frequencies above 6 GHz",
    "regulatory guidelines"
  ],
  "suggested_hubs": [
    {
      "slug": "5g-policy",
      "weight": 0.78,
      "reason": "Discusses regulatory borders/guidelines, urges SAR guidelines for 5G far-field exposure, and proposes minimum AP-UE distance for safety."
    }
  ]
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1109/southeastcon42311.2019.9020454
PubMed: Not supplied

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