RF Safe

Evaluation of aperture efficiency of a radiofrequency electric field strength meter antenna.

Health physics · 1997 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 6339

A calibration study evaluated the receiving aperture efficiency of a 1-m antenna on a narrow-band electric field strength meter centered at 27.12 MHz. The reported aperture efficiency was 0.47 with a coefficient of variation of +/-3.46%, considered adequate f…

Study snapshot

PublicationHealth physics · 1997
Study typeexposure_assessment
Reported directionUnclear
Evidence ratingInsufficient

Abstract

With present-day rapid increases in the applications of radiofrequency microwave radiation in research, medicine, defense, communications, and industry, it has become necessary to have simple inexpensive portable radiofrequency microwave field strength meters for health and safety surveys around operating equipment. This paper presents the results of a study conducted at Trombay calibrating grid to evaluate the receiving aperture efficiency of the 1-m long antenna of a simple narrow band electric field strength meter, with frequency response centered around 27.12 MHz. An aperture efficiency of 0.47 with a coefficient of variation of +/-3.46% is considered adequate for field use.

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 typeexposure_assessment
Effect directionunclear
PopulationNot supplied
Sample sizeNot supplied
ExposureRF · 27.12 MHz
Evidence strengthInsufficientConfidence: 78% · Peer reviewed: yes

Main findings

A calibration study evaluated the receiving aperture efficiency of a 1-m antenna on a narrow-band electric field strength meter centered at 27.12 MHz. The reported aperture efficiency was 0.47 with a coefficient of variation of +/-3.46%, considered adequate for field use.

Outcomes measured

  • Aperture efficiency of a 1-m antenna for a narrow-band electric field strength meter
  • Coefficient of variation of aperture efficiency
View raw extracted JSON
{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "RF",
    "source": "field strength meter antenna (measurement device)",
    "frequency_mhz": 27.12,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Aperture efficiency of a 1-m antenna for a narrow-band electric field strength meter",
    "Coefficient of variation of aperture efficiency"
  ],
  "main_findings": "A calibration study evaluated the receiving aperture efficiency of a 1-m antenna on a narrow-band electric field strength meter centered at 27.12 MHz. The reported aperture efficiency was 0.47 with a coefficient of variation of +/-3.46%, considered adequate for field use.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radiofrequency",
    "microwave",
    "field strength meter",
    "antenna",
    "aperture efficiency",
    "calibration",
    "27.12 MHz",
    "health and safety surveys"
  ],
  "suggested_hubs": []
}
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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: 10.1097/00004032-199702000-00018
PubMed: 9003720

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