A Novel Reverberation Chamber for In Vitro Bioelectromagnetic Experiments at 3.5 GHz

2022 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 627

Study snapshot

Publicationmanual · 2022

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

A Novel Reverberation Chamber for In Vitro Bioelectromagnetic Experiments at 3.5 GHz R. Orlacchio et al.. A Novel Reverberation Chamber for In Vitro Bioelectromagnetic Experiments at 3.5 GHz. IEEE Transactions on Electromagnetic Compatibility, doi: 10.1109/TEMC.2022.3216045. Abstract In this article, a mode-stirred reverberation chamber (RC) was designed and proposed for the first time as a cell culture incubator for in vitro electromagnetic waves exposure of adherent cells in tissue culture plates (TCPs). Typical cell incubators require specific conditions, such as temperature of 37 °C and humidity rate of 95%, which are challenging conditions for an RC. The chamber was characterized as an RC through an innovative experimental methodology based on the measurements of the S11 parameter of the emitting antenna. The proposed RC is adapted for in vitro bioelectromagnetic experiments for simultaneous exposure of up to 10 TCPs under highly homogeneous exposure conditions at 3.5 GHz, i.e., the mid-frequency band of the 5G telecommunication networks. Experimental results showed that the specific absorption rate (SAR) in the exposed samples extracted from temperature measurements was similar (an acceptable maximum variation lower than 30% was observed) in reason of the homogeneity and the uniformity of the field within the chamber. Specifically, measured SAR values were around 1.5 and 1 W/kg per 1 W incident, in 6-well or 96-well plates used for biological exposure, respectively. To validate our system, numerical simulations were performed. Overall, we showed that experimental and numerical SARs are in good agreement with differences <30% considering the standard deviation. ieeexplore.ieee.org

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AI evidence extraction

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Study typeengineering

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureRF · 3500 MHz

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

A mode-stirred reverberation chamber was designed to function as a cell culture incubator and enable simultaneous exposure of up to 10 tissue culture plates at 3.5 GHz under highly homogeneous conditions. SAR derived from temperature measurements showed acceptable variation (<30%) across samples; measured SAR values were around 1.5 W/kg (6-well plates) and 1 W/kg (96-well plates) per 1 W incident, and experimental and numerical SARs agreed within <30% (considering standard deviation).

Outcomes measured

Reverberation chamber (RC) design/characterization for in vitro exposure at 3.5 GHz
Exposure homogeneity/uniformity across tissue culture plates
Specific absorption rate (SAR) estimates from temperature measurements
Agreement between experimental SAR and numerical simulations

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": "RF",
    "source": null,
    "frequency_mhz": 3500,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Reverberation chamber (RC) design/characterization for in vitro exposure at 3.5 GHz",
    "Exposure homogeneity/uniformity across tissue culture plates",
    "Specific absorption rate (SAR) estimates from temperature measurements",
    "Agreement between experimental SAR and numerical simulations"
  ],
  "main_findings": "A mode-stirred reverberation chamber was designed to function as a cell culture incubator and enable simultaneous exposure of up to 10 tissue culture plates at 3.5 GHz under highly homogeneous conditions. SAR derived from temperature measurements showed acceptable variation (<30%) across samples; measured SAR values were around 1.5 W/kg (6-well plates) and 1 W/kg (96-well plates) per 1 W incident, and experimental and numerical SARs agreed within <30% (considering standard deviation).",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "reverberation chamber",
    "mode-stirred",
    "in vitro",
    "cell culture incubator",
    "3.5 GHz",
    "5G mid-band",
    "tissue culture plates",
    "SAR",
    "temperature measurements",
    "S11 parameter",
    "numerical simulations",
    "exposure homogeneity"
  ],
  "suggested_hubs": [
    {
      "slug": "5g-policy",
      "weight": 0.35,
      "reason": "Exposure system operates at 3.5 GHz, described as a mid-band frequency used in 5G networks."
    }
  ]
}

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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/temc.2022.3216045
PubMed: Not supplied

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