RF Safe

RF-induced temperature increase in a stratified model of the skin for plane-wave exposure at 6-100 GHz

2020 · Harm · Low evidence

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HarmLow evidencePaper 1603

Using a stratified 4–5 layer skin model under plane-wave incidence at 6–100 GHz, the maximum observed temperature increase was 0.4°C at the present general-population power density limit of 10 W m−2. The authors report this is more than twice a previous study…

Study snapshot

Publicationmanual · 2020
Study typeengineering
Reported directionHarm
Evidence ratingLow

Abstract

RF-induced temperature increase in a stratified model of the skin for plane-wave exposure at 6-100 GHz Christ A, Samaras T, Neufeld E, Kuster N. RF-induced temperature increase in a stratified model of the skin for plane-wave exposure at 6-100 GHz. Radiat Prot Dosimetry. 2020 Jan 16. pii: ncz293. doi: 10.1093/rpd/ncz293. Abstract This study assesses the maximum temperature increase induced by exposure to electromagnetic fields between 6 and 100 GHz using a stratified model of the skin with four or five layers under plane wave incidence. The skin model distinguishes the stratum corneum (SC) and the viable epidermis as the outermost layers of the skin. The analysis identifies the tissue layer structures that minimize reflection and maximize the temperature increase induced by the electromagnetic field. The maximum observed temperature increase is 0.4°C for exposure at the present power density limit for the general population of 10 W m -2 . This result is more than twice as high as the findings reported in a previous study. The reasons for this difference are identified as impedance matching effects in the SC and less conservative thermal parameters. Modeling the skin as homogeneous dermis tissue can underestimate the induced temperature increase by more than a factor of three. ncbi.nlm.nih.gov

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
ExposuremmWave
Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Using a stratified 4–5 layer skin model under plane-wave incidence at 6–100 GHz, the maximum observed temperature increase was 0.4°C at the present general-population power density limit of 10 W m−2. The authors report this is more than twice a previous study’s finding and attribute the difference to impedance matching effects in the stratum corneum and less conservative thermal parameters; modeling skin as homogeneous dermis can underestimate temperature increase by more than a factor of three.

Outcomes measured

  • Maximum temperature increase in skin model under plane-wave RF exposure (6–100 GHz)
  • Effect of skin layer structure (e.g., stratum corneum, viable epidermis) on reflection/impedance matching and heating
  • Comparison of stratified vs homogeneous dermis modeling on estimated temperature rise

Limitations

  • Modeling study using a stratified skin model; no human/clinical measurements reported in the abstract
  • Thermal parameters described as less conservative compared with a previous study (details not provided in abstract)
  • Plane-wave incidence scenario; applicability to real-world exposure conditions not described in abstract
View raw extracted JSON
{
  "study_type": "engineering",
  "exposure": {
    "band": "mmWave",
    "source": "other",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Maximum temperature increase in skin model under plane-wave RF exposure (6–100 GHz)",
    "Effect of skin layer structure (e.g., stratum corneum, viable epidermis) on reflection/impedance matching and heating",
    "Comparison of stratified vs homogeneous dermis modeling on estimated temperature rise"
  ],
  "main_findings": "Using a stratified 4–5 layer skin model under plane-wave incidence at 6–100 GHz, the maximum observed temperature increase was 0.4°C at the present general-population power density limit of 10 W m−2. The authors report this is more than twice a previous study’s finding and attribute the difference to impedance matching effects in the stratum corneum and less conservative thermal parameters; modeling skin as homogeneous dermis can underestimate temperature increase by more than a factor of three.",
  "effect_direction": "harm",
  "limitations": [
    "Modeling study using a stratified skin model; no human/clinical measurements reported in the abstract",
    "Thermal parameters described as less conservative compared with a previous study (details not provided in abstract)",
    "Plane-wave incidence scenario; applicability to real-world exposure conditions not described in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "millimeter wave",
    "6–100 GHz",
    "plane-wave exposure",
    "skin model",
    "stratum corneum",
    "viable epidermis",
    "impedance matching",
    "power density limit",
    "temperature increase",
    "thermal modeling"
  ],
  "suggested_hubs": [
    {
      "slug": "5g-policy",
      "weight": 0.62,
      "reason": "Assesses heating in skin for 6–100 GHz (includes mmWave frequencies relevant to 5G) at a general-population power density limit."
    }
  ]
}
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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: 10.1093/rpd/ncz293
PubMed: Not supplied

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