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FAQTOS
 
 

O FAQtos está em curso no INOV-INESC, tendo como objectivo disponibilizar publicamente informação relevante sobre radiação electromagnética em comunicações móveis (...)

 

Exposição à Radiação Proveniente de Antenas de Terminais Móveis



Título OET Bulletin 65, Supplement C - Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields, Additional Information for Evaluating Compliance of Mobile and Portable Devices with FCC Limits for Human Exposure
Resumo In August, 1996, the Commission adopted a Report and Order in ET Docket 93-62 amending its rules for evaluating the environmental effects of radiofrequency (RF) electromagnetic fields. Specifically, the Commission adopted new guidelines and procedures for evaluating human exposure to RF emissions from FCC-regulated transmitters and facilities. As a part of this proceeding, new limits were adopted for human exposure to RF emissions from certain mobile and portable devices. Two subsequent FCC Orders were issued to refine and clarify the decisions adopted in the original Report and Order. A revised version of OET Bulletin 65, "Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields" was also issued. One of the areas discussed in Bulletin 65 is compliance with the limits adopted by the Commission for safe exposure to RF emissions due to mobile and portable devices such as non-fixed wireless transmitters and hand-held cellular telephones. The first edition of Supplement C (97-01) was released in 1997. The purpose of this revised supplement is to provide parties filing applications for equipment authorization with guidance on complying with the latest requirements using up-to-date test procedures. This supplement is not intended, however, to establish mandatory procedures, and other methods and procedures may be acceptable if based on sound engineering practice.
Fonte Federal Communications Commission (FCC)
Origem Estados Unidos da América
Autor/Editor David L. Means, Kwok W. Chan
Disponibilidade Disponível online
Link fcc.gov
Referência OET Bulletin 65, Supplement C
Data Junho 2001
Título OET Bulletin 65, Supplement C - Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields, Additional Information for Evaluating Compliance of Mobile and Portable Devices with FCC Limits for Human Exposure
Resumo In August, 1996, the Commission adopted a Report and Order in ET Docket 93-62 amending its rules for evaluating the environmental effects of radiofrequency (RF) electromagnetic fields. Specifically, the Commission adopted new guidelines and procedures for evaluating human exposure to RF emissions from FCC-regulated transmitters and facilities. As a part of this proceeding, new limits were adopted for human exposure to RF emissions from certain mobile and portable devices. Two subsequent FCC Orders were issued to refine and clarify the decisions adopted in the original Report and Order. A revised version of OET Bulletin 65, "Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields" was also issued. One of the areas discussed in Bulletin 65 is compliance with the limits adopted by the Commission for safe exposure to RF emissions due to mobile and portable devices such as non-fixed wireless transmitters and hand-held cellular telephones. The first edition of Supplement C (97-01) was released in 1997. The purpose of this revised supplement is to provide parties filing applications for equipment authorization with guidance on complying with the latest requirements using up-to-date test procedures. This supplement is not intended, however, to establish mandatory procedures, and other methods and procedures may be acceptable if based on sound engineering practice.
Fonte Federal Communications Commission (FCC)
Origem Estados Unidos da América
Autor/Editor David L. Means, Kwok W. Chan
Disponibilidade Disponível online
Link fcc.gov
Referência OET Bulletin 65, Supplement C
Data Junho 2001
Título Product standard to demonstrate the compliance of mobile phones with the basic restrictions related to human exposure to electromagnetic fields (300 MHz - 3 GHz)
Resumo The standard, EN 50360 - product standard to demonstrate the compliance of mobile phones with the basic restrictions related to human exposure to electromagnetic fields (300 MHz - 3 GHz), sets down limits recommended by the Council in a Council Recommendation of 12 July 1999 on the limitation of exposure of the general public to electromagnetic fields (0 Hz to 300 GHz).
Fonte European Committee for Electrotechnical Standardization (CENELEC)
Origem Internacional
Autor/Editor CENELEC
Disponibilidade Disponível por encomenda
Link cenelec.eu
Referência BS EN 50360:2001+A1:2012
Data Abril 2012
Título SAR Generated by Commercial Cellular Phones — Phone Modeling, Head Modeling, and Measurements
Resumo This paper presents the computation of the specific absorption rate (SAR) generated by cellular phones inside an anatomical model of a head. Four models of commercially available phones have been considered working at 900- and 1800-MHz bands (global system for mobile communication system). The phones have been modeled by using a computer-aided design representation obtained through the reverse engineering technique. Both SAR distributions and SAR averaged values have been computed inside the anatomical model of a head, by using the finite-difference time-domain method. Computations have been experimentally validated through measurements performed inside anthropomorphic phantoms irradiated by a dipole and cellular phones.
Fonte IEEE Transactions on Microwave Theory and Techniques
Origem Internacional
Autor/Editor Andrea Schiavoni, Paola Bertotto, Gabriella Richiardi, Paolo Bielli
Disponibilidade Disponível por encomenda
Link ieeexplore.ieee.org
Referência vol. 48, no. 11, pp. 2064-2079
Data Novembro 2000
Título The Dependence of Electromagnetic Energy Absorption Upon Human Head Tissue Composition in the Frequency Range of 300-3000 MHz
Resumo The requirements for testing compliance of cellular phones with electromagnetic safety limits demand evaluation of the maximum exposure that may occur in the user group under normal operational conditions. Under these conditions, the tissues of the ear region are most exposed, the tissue composition of which is complex and varies considerably from user to user. The objective of this paper is to derive head tissue equivalent dielectric parameters that enable the utilization of one generic homogeneous head for testing compliance for the entire user group, i.e., granting no underestimation, but also not greatly overestimating the actual maximum user exposure. As a primary study, a simple analytical model of an infinite half-space layered tissue model exposed to a plane wave was utilized to investigate the impact of impedancematching standing waves, etc. on the spatial-peak specific absorption rate. The tissue layers were varied in composition and thickness, representing the anatomical variation of the exposed head region covering the user group including adults and children ( 10% to 90% percentile). Based on the worst-case tissue layer compositions with respect to absorption at each frequency, head tissue equivalent dielectric parameters for homogeneous modeling were derived, which result in the same spatial-peak absorption. The validity of this approach for near-field exposures was demonstrated by replacing the plane wave by different near-field sources (dipoles and generic phones) and the layered structure with magnetic-resonance-image-based nonhomogeneous human head models.
Fonte IEEE Transactions on Microwave Theory and Techniques
Origem Internacional
Autor/Editor Antonios Drossos, Veli Santomaa, Niels Kuster
Disponibilidade Disponível por encomenda
Link ieeexplore.ieee.org
Referência vol. 48, no. 11, pp. 1988-1995
Data Novembro 2000

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