1、 Recommendation ITU-R SM.2110-0 (09/2017) Frequency ranges for operation of non-beam wireless power transmission systems SM Series Spectrum management ii Rec. ITU-R SM.2110-0 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the
2、radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radiocommunication Sector are performed by World and Regiona
3、l Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 of Resolution ITU-R 1. Forms to be used for the submiss
4、ion of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information database can also be found. Series of ITU-R Reco
5、mmendations (Also available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fixed service M Mobile, radiodetermination, amateur
6、 and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems SM Spectrum management SNG Satellite news gathe
7、ring TF Time signals and frequency standards emissions V Vocabulary and related subjects Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2017 ITU 2017 All rights reserved. No part of this publication may be re
8、produced, by any means whatsoever, without written permission of ITU. Rec. ITU-R SM.2110-0 1 RECOMMENDATION ITU-R SM.2110-0 Frequency ranges for operation of non-beam wireless power transmission systems* (2017) Scope This Recommendation provides guidelines for the use of frequency ranges for the ope
9、ration of non-beam wireless power transmission (WPT), including charging of mobile/portable devices. Keywords Wireless power transmission, short-range devices, ISM, non-beam Abbreviations/Glossary CISPR: In French “Comit International Spcial des Perturbations Radiolectriques”, International Special
10、Committee on Radio Interference ICNIRP: International Commission on Non-ionizing Radiation Protection IEC: International Electrotechnical Commission ISO: International Standard Organization ISM: Industrial, Scientific, Medical GSC: Global Standards Collaboration RR: Radio Regulations SAE: Society of
11、 Automotive Engineers WHO: World Health Organization WPT: wireless power transmission WRC-19: World Radiocommunication Conference 2019 Related ITU Recommendations, Reports Recommendation ITU-R SM.1056; Recommendation ITU-R SM.1896; Report ITU-R SM.2153; Report ITU-R SM.2303. The ITU Radiocommunicati
12、on Assembly, considering a) that wireless power transmission (WPT) is defined as the transmission of power from a power source to an electrical load using the electromagnetic field; b) that WPT technologies utilize various mechanisms, such as transmission via radio frequency beams, inductive, resona
13、nt and capacitive coupling; c) that such WPT technologies may be useful in applications of charging of mobile/portable devices and electric vehicles etc.; * The global harmonization of frequencies for WPT for electric vehicles will be addressed under WRC-19 agenda item 9.1, issue 9.1.6 (i.e. Item 1
14、in the Annex to Resolution 958 (WRC-15). 2 Rec. ITU-R SM.2110-0 d) that WPT standards are currently being developed at national, regional, and international levels for the above-mentioned wireless charging of mobile devices and electric vehicles, etc.; e) that industrial alliances, consortia, and ac
15、ademia have investigated several frequency bands for WPT technologies, including; 19-21 kHz and 59-61 kHz for the shaped magnetic field in resonance for electric vehicles, 79-90 kHz for magnetic resonant technology for electric vehicles, 100-300 kHz for magnetic resonant and induction technology for
16、 mobile devices and 6 765-6 795 kHz for magnetic resonant technology for mobile devices; f) that studies have been concluded by one administration on the impact of WPT to radiocommunication services in the bands 79-90 kHz and 6 765-6 795 kHz, another administration undertook studies on the impact of
17、 WPT in the band 110-300 kHz and some administrations already authorize use of some of these bands for WPT technologies; g) that as the number of WPT devices is growing the use of WPT technologies may have an impact on the operation of radiocommunication services including the standard frequency and
18、 time signal service and the radio astronomy service; h) that radiation outside the bands used by WPT should be minimized in order to preserve the RF spectrum of radiocommunication services; i) that to mitigate the impact of WPT devices on the operation of radiocommunication services some solutions
19、utilize frequency bands designated for Industrial, Scientific, Medical (ISM) applications; j) that issues of non-ionizing radiation exposure are dealt with by international organizations such as the World Health Organization (WHO), the International Commission on Non-ionizing Radiation Protection (I
20、CNIRP), and International Electrotechnical Commission TC106, and that ICNIRP 2010 provides guidelines for limiting exposure (up to 10 MHz), and ICNIRP 1998 provides Guidelines for limiting exposure (up to 300 GHz), recognizing a) that WPT has no status in the Radio Regulations (RR) and therefore sho
21、uld not cause interference to radiocommunication services including the standard frequency and time signal service and the radio astronomy service; b) that both consumers and manufacturers will benefit from common spectrum bands used for WPT technologies; c) that for frequency bands designated for I
22、SM applications have been successfully used in the past for development and proliferation of innovative technologies in accordance with the RR; d) the band 6 765-6 795 kHz also designated for ISM use under RR No. 5.138 has been found to have advantages for WPT using magnetic resonance technologies i
23、n applications of charging of mobile/portable devices; e) that some non-ISM bands are taken into consideration for the global or regional harmonized use of specific WPT applications; f) that the WPT energy transfer can be treated separately from data communications, especially when the receiving dev
24、ice receives data communications at a different frequency to the energy transfer; g) that some Administrations classify the non-beam WPT energy transfer as an ISM application, even for operation outside bands designated for ISM use; h) that some Administrations classify non-beam WPT systems as Short
25、-Range Devices, operating in some bands listed in Recommendation ITU-R SM.1896 and Report ITU-R SM.2153; Rec. ITU-R SM.2110-0 3 i) that in the absence of a load, the WPT shuts off and only periodically polls or searches for the load, with very low duty cycle; j) that for WPT (non-beam), the radiated
26、 power is much lower than RF power transferred. Most power is transferred to the receiver through mechanisms such as capacitive, resonant and inductive coupling; k) that at VLF, LF and MF frequencies the environment is already very noisy relative to the victims thermal noise floor, due to atmospheri
27、c and man-made noise; l) that duration or power limits can be placed on WPT, noting a) that the International Electrotechnical Commission (IEC) has published a Technical Report IEC/TR 62869 on Wireless Power Transfer for audio, video and multimedia systems and equipment developed by TC 100; b) that
28、the IEC 61980 series, International Standard Organization (ISO) 19363, and the Society of Automotive Engineers (SAE) International J2954 are developing international standards intended for global and regional harmonization on electric vehicle WPT systems; c) that Resolution Global Standards Collabor
29、ation (GSC)-17/34 resolves to facilitate a strong and effective standards collaboration on WPT in terms of protocol, regulatory and interoperability aspects; d) that this Recommendation will assist administrations in applying RR No. 15.13 to prevent harmful interference to a radiocommunication servi
30、ce from equipment used for industrial, scientific and medical applications; e) that Recommendation ITU-R SM.1056 on the limitation of radiation from ISM equipment recommends that administrations consider the use of the latest edition of CISPR publication 11; f) that Report ITU-R SM.2303 discusses WP
31、T using technologies other than radio frequency beam, recommends that administrations should consider as a guideline the use of the frequency range listed in the following Table for the operation of non-beam WPT systems and should take steps to ensure that radiocommunication services including the s
32、tandard frequency and time signal service and the radio astronomy service are protected from WPT operations, including consideration of unwanted radio frequency energy (such as radiated electromagnetic disturbances) falling into all bands. TABLE 1 Frequency range for operation of non-beam WPT system
33、s Frequency range Suitable non-beam WPT technologies and applications 6 765-6 795 kHz Note: See RR No. 5.138 Magnetic resonant technology for mobile/portable devices NOTE This Table lists only one frequency range since no global harmonization for other frequency ranges could be reached at the moment of publication. This does not mean that the mentioned frequency range is the most suitable or the only available range for WPT. Other ranges may be added in due time.
