RF Safe

Comparison of electromagnetic exposure for passengers at different positions on the subway platform

2022 · No effect · Low evidence

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No effectLow evidencePaper 1261

Using HFSS simulations at 900 MHz for three waiting positions on a subway platform, the maximum SAR for both adult and child models occurred at the position nearest the leaky coaxial cable (position A): 1.5859×10^-7 W/kg (adult) and 1.0854×10^-7 W/kg (child).…

Study snapshot

Publicationmanual · 2022
Study typeengineering
Reported directionNo effect
Evidence ratingLow

Abstract

Comparison of electromagnetic exposure for passengers at different positions on the subway platform Li J, Lu M. Comparison of electromagnetic exposure for passengers at different positions on the subway platform. EMIE 2022; The 2nd International Conference on Electronic Materials and Information Engineering, Hangzhou, China, 2022, pp. 1-6. Abstract To evaluate the safety of electromagnetic exposure for passengers at different positions on the subway platform, the High Frequency Structure Simulator software is used to establish the exposure source, i.e., the leakage coaxial cable model and the adult and child passenger models. Three waiting positions (A, B and C) with an interval of 1.5 m are selected on the subway platform. The distribution of the specific absorption rate of the adult and child passengers at different waiting positions was calculated at 900 MHz. Results show that among the three locations, the maximum SAR values in the adult and child bodies appear at position A nearest to the exposure source, which are 1.5859×10(exp -7) and 1.0854×10(exp -7) W/kg, respectively. According to the comparison of the SAR distribution between the adult and the child at positions A and C, the SAR values in the child’s brain tissue are 4.98 and 2.80 times higher than those of the adult, respectively. The simulation results are well below the International Commission on Non-Ionizing Radiation Protection limits for the general public, indicating that the adult and child passengers do not suffer health risks under the electromagnetic exposure emitted by the leaky coaxial cable on the subway platform. 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 directionno_effect
PopulationAdult and child passenger models on a subway platform (simulation)
Sample sizeNot supplied
ExposureRF · 900 MHz
Evidence strengthLowConfidence: 74% · Peer reviewed: unknown

Main findings

Using HFSS simulations at 900 MHz for three waiting positions on a subway platform, the maximum SAR for both adult and child models occurred at the position nearest the leaky coaxial cable (position A): 1.5859×10^-7 W/kg (adult) and 1.0854×10^-7 W/kg (child). Child brain SAR was reported as 4.98× and 2.80× higher than adult at positions A and C, respectively. Reported SAR values were stated to be well below ICNIRP general public limits.

Outcomes measured

  • Specific absorption rate (SAR) distribution
  • Maximum SAR (W/kg)
  • Comparison of SAR in child vs adult brain tissue

Limitations

  • Simulation study (HFSS) rather than measurements in real passengers
  • Exposure source modeled as a leakage coaxial cable; other subway RF sources not described
  • Only one frequency evaluated (900 MHz)
  • Health outcomes were not measured; conclusions based on comparison to ICNIRP limits
View raw extracted JSON
{
  "study_type": "engineering",
  "exposure": {
    "band": "RF",
    "source": "other",
    "frequency_mhz": 900,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Adult and child passenger models on a subway platform (simulation)",
  "sample_size": null,
  "outcomes": [
    "Specific absorption rate (SAR) distribution",
    "Maximum SAR (W/kg)",
    "Comparison of SAR in child vs adult brain tissue"
  ],
  "main_findings": "Using HFSS simulations at 900 MHz for three waiting positions on a subway platform, the maximum SAR for both adult and child models occurred at the position nearest the leaky coaxial cable (position A): 1.5859×10^-7 W/kg (adult) and 1.0854×10^-7 W/kg (child). Child brain SAR was reported as 4.98× and 2.80× higher than adult at positions A and C, respectively. Reported SAR values were stated to be well below ICNIRP general public limits.",
  "effect_direction": "no_effect",
  "limitations": [
    "Simulation study (HFSS) rather than measurements in real passengers",
    "Exposure source modeled as a leakage coaxial cable; other subway RF sources not described",
    "Only one frequency evaluated (900 MHz)",
    "Health outcomes were not measured; conclusions based on comparison to ICNIRP limits"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "unknown",
  "keywords": [
    "subway platform",
    "leaky coaxial cable",
    "RF exposure",
    "900 MHz",
    "HFSS",
    "specific absorption rate",
    "adult model",
    "child model",
    "ICNIRP limits"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.62,
      "reason": "Abstract explicitly compares simulated SAR to ICNIRP general public limits."
    },
    {
      "slug": "occupational-exposure",
      "weight": 0.2,
      "reason": "Exposure context is a subway platform environment, but focus is passengers (general public) rather than workers."
    }
  ]
}
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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: Not supplied
PubMed: Not supplied

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