Archive

11 posts

Definition and Validation of an Exposure Measurement Method for a Typical Load of a Base Station

Research RF Safe Research Library Jan 1, 2025

This exposure-assessment study proposes and validates a method to measure instantaneous RF exposure under typical base station load by generating defined data rates (low/medium/high) using iPerf and measuring channel power across services. Validation at four base stations suggests the approach is reliable across different times of day and loads, with reproducible results when averaging over 30 sweeps. Comparisons indicate iPerf-provoked constant data rates generally match exposure during real application usage, with few deviations beyond stated uncertainty.

Analysis of Actual Transmitted Power from Hundreds of 5G FR2 Radio Base Stations over One Month in Urban Areas in Japan

Research RF Safe Research Library Jan 1, 2025

This exposure/compliance assessment study collected 5- and 30-minute transmitted power data over one month from more than 400 5G FR2 beamforming base stations in urban Japan to evaluate the IEC 62232:2025 “actual maximum approach.” All measured transmitted powers were below configured maxima, with 30-minute averaged normalized maxima reported as < -8 dB, while 5-minute averaged maxima reached about -3 dB under low UE counts. The authors report that the actual maximum approach can avoid overestimation for longer averaging times, but may underestimate exposure for stations with three or fewer UEs if power is not monitored and controlled.

Machine Learning Approach for Ground-Level Estimation of Electromagnetic Radiation in the Near Field of 5G Base Stations

Research RF Safe Research Library Jan 1, 2025

This paper presents a machine-learning method to estimate ground-level electromagnetic radiation (electric field strength) in the near field of 5G base stations, using multiple technical and environmental input parameters. The authors report experimental performance with a mean absolute percentage error of about 5.89% and suggest the approach can reduce costs compared with on-site measurements. The work is positioned as supporting exposure management and base-station placement, while noting the need for careful EMF management due to potential health-risk links.

Greater prevalence of symptoms associated with higher exposures to mobile phone base stations in a hilly, densely populated city in Mizoram, India

Research RF Safe Research Library Jan 1, 2025

This cross-sectional study compared 183 higher-exposed residents with 126 matched reference residents and assessed symptoms via questionnaire alongside in-home RF-EMF power density measurements from mobile phone base stations. Higher exposure (including proximity within 50 m and power densities of 5–8 mW/m2) was reported to be associated with increased symptom prevalence across mood-energy, cognitive-sensory, inflammatory, and anatomical categories. The authors conclude that current public exposure limits may be inadequate for long-term, non-thermal biological impacts and call for precautionary policy updates.

Evaluation of Personal Radiation Exposure from Wireless Signals in Indoor and Outdoor Environments

Research RF Safe Research Library Jan 1, 2025

This exposure assessment measured personal RF electric field strength in multiple indoor and outdoor micro-environments in Malaysia using an ExpoM-RF 4 meter and modeled exposure with machine learning (FCNN, XG Boost) and linear regression. Reported exposures were usually below the stated public limit (61.4 V/m), but maximum values in dense urban areas with many base stations were reported to approach 56.7365 V/m. The authors frame near-threshold maxima in high-density areas as a potential health risk and recommend caution and monitoring.

In-Situ Measurements of Radiofrequency Electromagnetic Fields Measurements Around 5G Macro Base Stations in the UK

Research RF Safe Research Library Jan 1, 2025

This exposure assessment performed RF spot measurements in line-of-sight to 56 active 5G macro base stations across 30 publicly accessible UK locations. Power density was measured across 420 MHz–6 GHz under multiple scenarios (background, streaming, downlink speed test, and extrapolated SS-RSRP decoding). Reported total RF and 5G-specific levels were within 1998 ICNIRP public reference levels, with 4G downlink contributing most of the measured exposure.

Deduction of Extrapolation Factors in Realistic Scenarios for In-Situ Assessment of 5G Base Stations

Research RF Safe Research Library Jan 1, 2025

This conference paper examines extrapolation factors used for in-situ EMF exposure assessment of 5G base stations in realistic indoor and outdoor scenarios. Using both frequency-selective and code-selective measurement approaches under varying traffic conditions, it reports substantial variability in extrapolated exposure estimates driven largely by antenna radiation patterns. Outdoor environments showed more stable extrapolation than indoor environments, highlighting challenges for reliable exposure assessment when antenna patterns and network configurations are not well characterized.

Assessing EMF Exposure in Greek Urban and Suburban Areas During 5G Deployment: A Focus on 5G EMF Levels and Distance Correlation

Research RF Safe Research Library Jan 1, 2025

This exposure assessment reports 400 ground-level electric field measurements in Greek urban and suburban areas during 5G deployment. It finds that 4G contributes most to overall measured EMF exposure, while 5G currently contributes less. The study reports an inverse relationship between 3.5 GHz EMF levels and distance from 5G base stations, with urban areas showing higher levels than suburban areas.

High Radiofrequency Radiation in the Surroundings of 10 Schools in Örebro, Sweden

Research RF Safe Research Library Jan 1, 2025

This exposure assessment measured outdoor RF radiation from 4G/5G base stations near 10 schools in Örebro, Sweden (October 2024). The authors report maximum levels of 10,716–68,452 μW/m² and state these are far above EUROPAEM EMF guideline ranges; two locations also showed higher peak readings with a second meter. The paper frames these findings as indicating a significant health risk, particularly for children and sensitive groups, though no health outcomes were measured in this study.

A Decision Support System for Managing Health Symptoms of Living Near Mobile Phone Base Stations

Research RF Safe Research Library Jan 1, 2024

This analytical study evaluated machine learning models (SVM and Random Forest) to predict health symptoms in adults living near mobile phone base stations. The SVM model reportedly achieved high predictive performance for headache, sleep disturbance, dizziness, vertigo, and fatigue, and outperformed Random Forest and prior models. The abstract concludes that proximity to base stations is connected with increased prevalence of several symptoms and emphasizes distance, age, and duration of residence as key predictors.

Microwave frequency electromagnetic fields (EMFs) produce widespread neuropsychiatric effects including depression

Research RF Safe Research Library Jan 1, 2016

This 2016 narrative review proposes that non-thermal microwave/lower-frequency EMFs act primarily through activation of voltage-gated calcium channels (VGCCs), with calcium channel blockers reported to block EMF effects. It summarizes animal, occupational, and epidemiological literature and reports that exposures from base stations, heavy mobile phone use, and wireless smart meters are associated with neuropsychiatric symptoms, sometimes with doseresponse patterns. The author concludes that multiple lines of evidence collectively support that non-thermal microwave EMF exposures can produce diverse neuropsychiatric effects including depression.

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