Miniature anechoic chamber for chronic exposure of small animals to plane-wave microwave fields.

The Journal of microwave power · 1979 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 6061

Study snapshot

PublicationThe Journal of microwave power · 1979

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

A system of miniature anechoic chambers for chronically exposing a sizeable number of animals to microwave radiation was developed in which each animal can be individually exposed to microwaves or sham-exposed under controlled environmental conditions. Each animal is supplied with food and water by means designed to eliminate undesirable perturbations of the field. Field patterns in each chamber correspond closely to those made in large anechoic chambers; measurements indicate that a power density of 169 microW/cm2 per watt of input power can be provided, which results in peak SAR levels of 0.37 W/kg in cadavers of exposed rats.

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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 directionunclear

Populationrats

Sample sizeNot supplied

Exposuremicrowave · 0.37 W/kg · chronic

Evidence strengthInsufficientConfidence: 78% · Peer reviewed: yes

Main findings

The authors developed miniature anechoic chambers enabling individual chronic microwave or sham exposure of animals under controlled environmental conditions. Field patterns were reported to correspond closely to those in large anechoic chambers; measurements indicated 169 microW/cm2 per watt of input power, yielding peak SAR levels of 0.37 W/kg in cadavers of exposed rats.

Outcomes measured

Development/validation of miniature anechoic chambers for chronic microwave exposure
Field pattern characterization vs large anechoic chambers
Power density per input power
Peak SAR in rat cadavers

Limitations

Microwave frequency not reported in the abstract
SAR reported in cadavers rather than live animals
No biological/health outcomes reported in the abstract
Sample size not reported

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": "microwave",
    "source": "other",
    "frequency_mhz": null,
    "sar_wkg": 0.37,
    "duration": "chronic"
  },
  "population": "rats",
  "sample_size": null,
  "outcomes": [
    "Development/validation of miniature anechoic chambers for chronic microwave exposure",
    "Field pattern characterization vs large anechoic chambers",
    "Power density per input power",
    "Peak SAR in rat cadavers"
  ],
  "main_findings": "The authors developed miniature anechoic chambers enabling individual chronic microwave or sham exposure of animals under controlled environmental conditions. Field patterns were reported to correspond closely to those in large anechoic chambers; measurements indicated 169 microW/cm2 per watt of input power, yielding peak SAR levels of 0.37 W/kg in cadavers of exposed rats.",
  "effect_direction": "unclear",
  "limitations": [
    "Microwave frequency not reported in the abstract",
    "SAR reported in cadavers rather than live animals",
    "No biological/health outcomes reported in the abstract",
    "Sample size not reported"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "miniature anechoic chamber",
    "chronic exposure",
    "microwave radiation",
    "plane-wave",
    "sham exposure",
    "power density",
    "SAR",
    "rats"
  ],
  "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: 10.1080/16070658.1979.11689168
PubMed: 261595

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