Relatórios técnicos
2211, 2021
| Título | Supplement on radiofrequency exposure evaluation around underground base stations |
| Resumo | Measurement and computation methods of human exposure to electromagnetic fields (EMFs) from fixed radio sources like mobile base stations have been standardized and published as ITU-T K-series Recommendations and IEC 62232. These also include methods prescribed in Japanese regulation and have been basically assumed to be applied to radio sources installed above the ground. Underground base stations for use in small cells of fourth generation (4G) mobile networks are installed underground to construct service areas above the ground. Supplement 20 to ITU-T K-series Recommendations contains the measurement results of radio frequency exposure from underground base stations, to evaluate the exposure from these base stations. |
| Fonte | ITU-T |
| Origem | Internacional |
| Autor/Editor | ITU-T Study Group 5 |
| Disponibilidade | Disponível online |
| Endereço | https://www.itu.int /rec/T-REC-K.Sup20 |
| Referência | T-REC-K.Sup20 |
| Data | Dezembro 2021 |
2211, 2021
| Título | Radiofrequency electromagnetic field (RF-EMF) exposure levels from mobile and portable devices during different conditions of use |
| Resumo | Modern mobile devices may be used for many different purposes. There are differences between the ways of using them depending on the service. Also, the exposure to RF-EMF is different depending on the service, environment and the conditions of the use of the mobile devices. This Supplement describes the various factors that determine the level of RF-EMF exposure, as defined by the specific absorption rate (SAR) that is induced in the users of mobile and portable radiocommunication devices. Based on this technical information practical information and guidance is provided for users of mobile devices. |
| Fonte | ITU-T |
| Origem | Internacional |
| Autor/Editor | ITU-T Study Group 5 |
| Disponibilidade | Disponível online |
| Endereço | https://www.itu.int /rec/T-REC-K.Sup13 |
| Referência | T-REC-K.Sup13 |
| Data | Dezembro 2021 |
2211, 2021
| Título | Guidance on complying with limits for human exposure to electromagnetic fields |
| Resumo | Recommendation ITU-T K.52 aims to help with compliance of telecommunication installations and mobile handsets, or other radiating devices used against the head with safety limits for human exposure to electromagnetic fields (EMFs). It presents general guidance, a calculation method and an installation assessment procedure. The assessment procedure for telecommunication installations, based on safety limits provided by the International Commission on Non-Ionizing Radiation Protection (ICNIRP), helps users determine the likelihood of installation compliance based on accessibility criteria, antenna properties and emitter power. The IEC Standard for the compliance measurement of mobile handsets is recommended. |
| Fonte | ITU-T |
| Origem | Internacional |
| Autor/Editor | ITU-T Study Group 5 |
| Disponibilidade | Disponível online |
| Endereço | https://www.itu.int /rec/T-REC-K.52 |
| Referência | T-REC-K.52-202106-I |
| Data | Junho 2021 |
2211, 2021
| Título | Guide on electromagnetic fields and health |
| Resumo | The objective of Supplement 1 to the ITU-T K-series Recommendations is to answer questions commonly posed by the public on the electromagnetic field (EMF) phenomenon and to address related concerns. This Guide on electromagnetic fields and health aims to:• Provide electromagnetic field (EMF) information and education resources suitable for all communities, stakeholders and governments.• Support clarification of the science by referencing the World Health Organization (WHO) and other stakeholders (see NOTE) that provide information that is particularly useful in helping to clarify scientific uncertainties e.g., in the areas of radio frequency (RF) technology, infrastructure implementation, usage and consequential EMF exposure.NOTE – The primary reference on EMF and health is the World Health Organization (WHO). The primary reference on EMF assessment methods is the International Telecommunication Union (ITU) and the International Electrotechnical Commission (IEC). |
| Fonte | ITU-T |
| Origem | Internacional |
| Autor/Editor | ITU-T Study Group 5 |
| Disponibilidade | Disponível online |
| Endereço | https://www.itu.int /rec/T-REC-K.Sup1 |
| Referência | T-REC-K.Sup1 |
| Data | Maio 2021 |
2211, 2021
| Título | Mitigation techniques to limit human exposure to EMFs in the vicinity of radiocommunication stations |
| Resumo | Recommendation ITU-T K.70 defines techniques which may be used by telecommunication operators to evaluate the cumulative (total) exposure ratio in the vicinity of transmitting antennas and to identify the main source of radiation. It offers guidance on mitigation methods which allow reduction of radiation level in order to comply with exposure limits. It also provides guidance on procedures necessary in the environment (on site) in which, in most cases, there is a simultaneous exposure to multiple frequencies from many different sources. Radiating sources may belong to many operators and may represent different radiocommunication services (e.g., cellular systems, trunking systems, broadcasting, radio relays, wireless access, etc.). Appendix I includes an electronic attachment with distinct 32-bit and 64-bit versions of the EMF estimator software. As Microsoft Access 32-bit and 64-bit versions cannot be served by the same software package, two versions of this software are proposed. Furthermore, two separate install procedures are required in order to run this software depending on the Microsoft Access version installed on the user PC. |
| Fonte | ITU-T |
| Origem | Internacional |
| Autor/Editor | ITU-T Study Group 5 |
| Disponibilidade | Disponível online |
| Endereço | https://www.itu.int /rec/T-REC-K.70 |
| Referência | T-REC-K.70 |
| Data | Dezembro 2020 |