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

PAPER pubmed The Journal of microwave power 1979 Engineering / measurement Effect: unclear Evidence: Insufficient

Read original paper → DOI: 10.1080/16070658.1979.11689168 PMID: 261595 Evidence Lab

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.

AI evidence extraction

At a glance

Study type

Engineering / measurement

Effect direction

unclear

Population

rats

Sample size

—

Exposure

microwave other · 0.37 W/kg · chronic

Evidence strength

Insufficient

Confidence: 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": 0.36999999999999999555910790149937383830547332763671875,
        "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": 0.7800000000000000266453525910037569701671600341796875,
    "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/metadata and may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.

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