RF Safe

Methodology to determine threshold distance for estimating main electromagnetic exposure in wireless local area network (WiFi)

2022 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 803

The paper proposes a methodology (using simulations with modeled WiFi antennas and experimental measurements) to determine a threshold distance where field strength from a WiFi access point becomes negligible compared with radiation from user equipment. Resul…

Study snapshot

Publicationmanual · 2022
Study typeengineering
Reported directionUnclear
Evidence ratingInsufficient

Abstract

Methodology to determine threshold distance for estimating main electromagnetic exposure in wireless local area network (WiFi) Marta Fernández, David Guerra. Methodology for determining the threshold distance for estimating the main EM exposure contribution in WLAN. Engineering Science and Technology, an International Journal. Volume 25, 2022, 100997. doi:10.1016/j.jestch.2021.05.001. Abstract The location of radiation sources in wireless networks is a key factor to characterize their contribution to electromagnetic exposure levels in order to deploy future networks that account for minimizing electromagnetic field levels. In relation to wireless local area networks, considering that mobile communication devices comply with the SAR (Specific Absorption Rate) limits imposed by the international standardization organizations for preserving human health, the interest is nowadays focused on the signal levels coming from the WiFi access points. This paper presents a methodology to determine the threshold distance at which the field strength levels from the AP are negligible in comparison with the radiation generated by a user equipment. The theoretical concepts, which can be applied to other technologies, were implemented by means of simulations and experimental measurements. For the simulations, actual WiFi antennas were modelled. Experimental measurements completed the results obtained in simulations, resulting in a greater number of real situations. Results showed that the threshold distance depends on the WiFi standard employed by the devices connected to the network. Open access paper: sciencedirect.com

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 directionunclear
PopulationNot supplied
Sample sizeNot supplied
ExposureRF
Evidence strengthInsufficientConfidence: 74% · Peer reviewed: unknown

Main findings

The paper proposes a methodology (using simulations with modeled WiFi antennas and experimental measurements) to determine a threshold distance where field strength from a WiFi access point becomes negligible compared with radiation from user equipment. Results indicated the threshold distance depends on the WiFi standard used by connected devices.

Outcomes measured

  • Electric field strength levels / EM exposure contribution
  • Threshold distance at which WiFi access point (AP) field strength is negligible vs user equipment
View raw extracted JSON
{
  "study_type": "engineering",
  "exposure": {
    "band": "RF",
    "source": "wi-fi",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Electric field strength levels / EM exposure contribution",
    "Threshold distance at which WiFi access point (AP) field strength is negligible vs user equipment"
  ],
  "main_findings": "The paper proposes a methodology (using simulations with modeled WiFi antennas and experimental measurements) to determine a threshold distance where field strength from a WiFi access point becomes negligible compared with radiation from user equipment. Results indicated the threshold distance depends on the WiFi standard used by connected devices.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "unknown",
  "keywords": [
    "WiFi",
    "WLAN",
    "wireless local area network",
    "access point",
    "user equipment",
    "electromagnetic exposure",
    "field strength",
    "threshold distance",
    "simulations",
    "experimental measurements",
    "SAR limits"
  ],
  "suggested_hubs": [
    {
      "slug": "school-wi-fi",
      "weight": 0.55,
      "reason": "Focuses on EM exposure characterization from WiFi access points, which is relevant to WiFi exposure settings such as schools."
    }
  ]
}
AI can be wrong. Always verify against the paper.

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: 10.1016/j.jestch.2021.05.001
PubMed: Not supplied

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