A Multi-Band Body-Worn Distributed Exposure Meter for Personal Radio-Frequency Dosimetry in Diffuse Indoor Environments

2019 · No effect · Insufficient evidence

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No effectInsufficient evidencePaper 1831

Study snapshot

Publicationmanual · 2019

Study typeengineering

Reported directionNo effect

Evidence ratingInsufficient

Abstract

A Multi-Band Body-Worn Distributed Exposure Meter for Personal Radio-Frequency Dosimetry in Diffuse Indoor Environments Aminzadeh R, Thielens A, ..., Wout J. (19 authors). A multi-band body-worn distributed exposure meter for personal radio-frequency dosimetry in diffuse indoor environments. IEEE Sensors Journal. April 29, 2019. DOI: 10.1109/JSEN.2019.2913309 Abstract A multi-band body-worn distributed exposure meter (BWDM) is designed and calibrated for diffuse fields in a reverberation chamber (RC) for personal exposure assessment in indoor environments. The BWDM uses 22 nodes distributed over the torso and measures the incident power density (Sinc) on body for 11 telecommunication bands in the frequency range 790-5513 MHz. In order to calibrate the measurement device in diffuse fields, a protocol is proposed for on-body calibration of the BWDM. This protocol is applicable to wearable personal exposure meters in general. The BWDM and the proposed calibration protocol are validated in five indoor locations and five frequency bands (the downlink bands at 800, 900, 1800 and 2100 MHz and WiFi 2 GHz) using a tri-axial broadband antenna and a spectrum analyzer (SA). The calibration shows that the BWDM has a relatively low measurement uncertainty with a 68% confidence interval on its antenna apertures, in the range 3.4-5.5 dB. A maximum difference of 0.9 dB is obtained for the total exposure in the test areas between the measurements of the BWDM and SA, which is an excellent agreement. ieeexplore.ieee.org

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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

PopulationNot supplied

Sample sizeNot supplied

ExposureRF

Evidence strengthInsufficientConfidence: 78% · Peer reviewed: yes

Main findings

A multi-band body-worn distributed exposure meter (22 nodes) was designed and calibrated for diffuse indoor fields, measuring incident power density on-body for 11 bands from 790–5513 MHz. Validation in five indoor locations and five frequency bands showed a 68% confidence interval uncertainty of 3.4–5.5 dB on antenna apertures and a maximum difference of 0.9 dB in total exposure compared with spectrum analyzer measurements.

Outcomes measured

Incident power density on-body (Sinc) across telecommunication bands
Calibration protocol performance in diffuse fields
Measurement uncertainty (dB)
Agreement vs tri-axial broadband antenna + spectrum analyzer measurements

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": "RF",
    "source": "wearable personal exposure meter; indoor telecommunication downlink bands; WiFi",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Incident power density on-body (Sinc) across telecommunication bands",
    "Calibration protocol performance in diffuse fields",
    "Measurement uncertainty (dB)",
    "Agreement vs tri-axial broadband antenna + spectrum analyzer measurements"
  ],
  "main_findings": "A multi-band body-worn distributed exposure meter (22 nodes) was designed and calibrated for diffuse indoor fields, measuring incident power density on-body for 11 bands from 790–5513 MHz. Validation in five indoor locations and five frequency bands showed a 68% confidence interval uncertainty of 3.4–5.5 dB on antenna apertures and a maximum difference of 0.9 dB in total exposure compared with spectrum analyzer measurements.",
  "effect_direction": "no_effect",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "body-worn distributed exposure meter",
    "personal exposure assessment",
    "radio-frequency dosimetry",
    "diffuse indoor environments",
    "reverberation chamber",
    "incident power density",
    "calibration protocol",
    "telecommunication bands",
    "WiFi",
    "spectrum analyzer"
  ],
  "suggested_hubs": [
    {
      "slug": "school-wi-fi",
      "weight": 0.25,
      "reason": "Includes validation in WiFi 2 GHz band for indoor exposure assessment."
    }
  ]
}

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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/jsen.2019.2913309
PubMed: Not supplied

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