Impact of a small cell on the RF-EMF exposure in a train.

{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "RF",
    "source": "in-train small cell (miniature mobile-phone base station) vs outdoor macrocell network; mobile phone user uplink + base station downlink",
    "frequency_mhz": 1800,
    "sar_wkg": null,
    "duration": "while traveling on the train"
  },
  "population": "mobile-phone user traveling on a train (passenger)",
  "sample_size": null,
  "outcomes": [
    "RF-EMF absorbed dose (combined downlink + uplink)",
    "brain exposure",
    "whole-body exposure"
  ],
  "main_findings": "For GSM at 1800 MHz, connecting to an in-train small cell (vs outdoor macrocell) could realistically reduce the user’s brain exposure by a factor of 35 and whole-body exposure by a factor of 11, using an absorbed-dose concept combining downlink and uplink contributions.",
  "effect_direction": "benefit",
  "limitations": [],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "small cell",
    "train",
    "RF-EMF",
    "exposure assessment",
    "absorbed dose",
    "downlink",
    "uplink",
    "GSM",
    "1800 MHz"
  ],
  "suggested_hubs": [
    {
      "slug": "5g-policy",
      "weight": 0.2,
      "reason": "Study concerns small cells, but only GSM 1800 MHz is specified (not 5G)."
    },
    {
      "slug": "who-icnirp",
      "weight": 0.15,
      "reason": "RF-EMF exposure assessment relevant to guideline/policy discussions, though no guidelines are evaluated."
    }
  ]
}