Exposure of Insects to Radio-Frequency Electromagnetic Fields from 2 to 120 GHz

Abstract

Insects are continually exposed to Radio-Frequency (RF) electromagnetic fields at different frequencies. The range of frequencies used for wireless telecommunication systems will increase in the near future from below 6 GHz (2 G, 3 G, 4 G, and WiFi) to frequencies up to 120 GHz (5 G). This paper is the first to report the absorbed RF electromagnetic power in four different types of insects as a function of frequency from 2 GHz to 120 GHz. A set of insect models was obtained using novel Micro-CT (computer tomography) imaging. These models were used for the first time in finite-difference time-domain electromagnetic simulations. All insects showed a dependence of the absorbed power on the frequency. All insects showed a general increase in absorbed RF power at and above 6 GHz, in comparison to the absorbed RF power below 6 GHz. Our simulations showed that a shift of 10% of the incident power density to frequencies above 6 GHz would lead to an increase in absorbed power between 3-370%.

AI evidence extraction

Main findings

Using Micro-CT-based insect models and finite-difference time-domain simulations from 2 to 120 GHz, the study found that absorbed RF power depended on frequency in all four insect types. Absorbed power generally increased at and above 6 GHz compared with below 6 GHz, and a simulated 10% shift of incident power density to frequencies above 6 GHz increased absorbed power by 3-370%.

Outcomes measured

• Absorbed RF electromagnetic power as a function of frequency
• Change in absorbed power below versus at/above 6 GHz
• Simulated effect of shifting incident power density to frequencies above 6 GHz

Limitations

• Simulation/modeling study rather than direct biological measurement
• Only four insect types were modeled
• Abstract reports absorbed power, not health or ecological outcomes

Suggested hubs

• 5g-policy (0.95)
  The abstract explicitly discusses frequencies up to 120 GHz and 5G.

{
    "study_type": "engineering",
    "exposure": {
        "band": "RF",
        "source": "wireless telecommunication systems",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": "Four different types of insects",
    "sample_size": 4,
    "outcomes": [
        "Absorbed RF electromagnetic power as a function of frequency",
        "Change in absorbed power below versus at/above 6 GHz",
        "Simulated effect of shifting incident power density to frequencies above 6 GHz"
    ],
    "main_findings": "Using Micro-CT-based insect models and finite-difference time-domain simulations from 2 to 120 GHz, the study found that absorbed RF power depended on frequency in all four insect types. Absorbed power generally increased at and above 6 GHz compared with below 6 GHz, and a simulated 10% shift of incident power density to frequencies above 6 GHz increased absorbed power by 3-370%.",
    "effect_direction": "harm",
    "limitations": [
        "Simulation/modeling study rather than direct biological measurement",
        "Only four insect types were modeled",
        "Abstract reports absorbed power, not health or ecological outcomes"
    ],
    "evidence_strength": "low",
    "confidence": 0.9499999999999999555910790149937383830547332763671875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "insects",
        "radio-frequency electromagnetic fields",
        "RF",
        "2-120 GHz",
        "5G",
        "WiFi",
        "absorbed power",
        "finite-difference time-domain",
        "Micro-CT",
        "simulation"
    ],
    "suggested_hubs": [
        {
            "slug": "5g-policy",
            "weight": 0.9499999999999999555910790149937383830547332763671875,
            "reason": "The abstract explicitly discusses frequencies up to 120 GHz and 5G."
        }
    ]
}

Comments

Log in to comment.

No comments yet.