Electromagnetic Shielding of Building Walls: From Roman times to the present age

2016 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 1439

Measurements in Rome across building typologies (from Roman ruins to modern reinforced concrete and steel/glass buildings) over 0.7–5.0 GHz found shielding effectiveness values up to 100 dB. The analysis reported that ancient Roman building walls and steel/gl…

Study snapshot

Publicationmanual · 2016

Study typeexposure_assessment

Reported directionUnclear

Evidence ratingInsufficient

Abstract

Electromagnetic Shielding of Building Walls: From Roman times to the present age Davide Micheli, Paolo Gianola, Giorgio Bertin, Andrea Delfini, Roberto Pastore, Mario Marchetti, Roberto Diana. Electromagnetic Shielding of Building Walls: From Roman times to the present age. IEEE Antennas and Propagation Magazine. 58(5). Oct. 2016. Abstract We have investigated the electromagnetic (EM) shielding effectiveness (SE) of building walls built in different ages. The measurements were carried out in the city of Rome, analyzing different building typologies from Roman Empire historical ruins up to modern reinforced concrete and steel/glass buildings. The method consisted of a measurement performed by means of a portable two-port vector network analyzer (VNA) connected to a couple of light antennas located in opposite positions with respect to the middle wall. The explored frequencies were in the range of 0.7-5.0 GHz, which many countries have currently adopted for mobile-phone radio access network (RAN) and satellite positioning services. The SE measurements showed values of up to 100 dB, and the analysis of the results showed that ancient Romans building walls and steel/glass building structures have the highest shielding capability. A numerical simulation of the outdoor-to-indoor transition attenuation and a statistical analysis of the signal code power in the live RAN of Telecom Italia integrate the discussion of the results. 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 typeexposure_assessment

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureRF

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

Shielding effectiveness (SE) of building walls
Outdoor-to-indoor transition attenuation
Statistical analysis of signal code power in a live mobile-phone RAN

View raw extracted JSON

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  "study_type": "exposure_assessment",
  "exposure": {
    "band": "RF",
    "source": "building walls (shielding/attenuation of outdoor-to-indoor signals)",
    "frequency_mhz": null,
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    "duration": null
  },
  "population": null,
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  "outcomes": [
    "Shielding effectiveness (SE) of building walls",
    "Outdoor-to-indoor transition attenuation",
    "Statistical analysis of signal code power in a live mobile-phone RAN"
  ],
  "main_findings": "Measurements in Rome across building typologies (from Roman ruins to modern reinforced concrete and steel/glass buildings) over 0.7–5.0 GHz found shielding effectiveness values up to 100 dB. The analysis reported that ancient Roman building walls and steel/glass building structures had the highest shielding capability.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic shielding",
    "shielding effectiveness",
    "building walls",
    "outdoor-to-indoor attenuation",
    "vector network analyzer",
    "0.7-5.0 GHz",
    "mobile-phone RAN",
    "Rome",
    "steel/glass buildings",
    "reinforced concrete"
  ],
  "suggested_hubs": [
    {
      "slug": "exposure-assessment",
      "weight": 0.86,
      "reason": "Direct measurements of RF shielding effectiveness and outdoor-to-indoor attenuation across building types in the 0.7–5.0 GHz range relevant to mobile networks."
    }
  ]
}

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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: Not supplied
PubMed: Not supplied

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