YD/T 1644.2-2011 (YD/T1644.2-2011, YDT 1644.2-2011, YDT1644.2-2011) & related versions
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Human exposure to radio frequency fields from hand-held and body-mounted wireless communication devices-human models, instrumentation, and procedures. Part 2: Procedure to determine the specific absorption rate(SAR) for wireless communication devices used
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YD/T 1644.2-2011
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YDT 1644.2-2011
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YD/T 1644.2-2011: PDF in English (YDT 1644.2-2011)
YD/T 1644.2-2011
YD
COMMUNICATIONS INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 33.100
M 04
Human exposure to radio frequency fields from hand-held and
body-mounted wireless communication devices - Human
models, instrumentation, and procedures - Part 2. Procedure
to determine the specific absorption rate (SAR) for wireless
communication devices used in close proximity to the human
body (frequency range of 30 MHz to 6 GHz)
IEC 62209-2.2010-03, IDT
ISSUED ON. DECEMBER 20, 2012
IMPLEMENTED ON. FEBRUARY 1, 2012
Issued by. Ministry of Industry and Information Technology of the PRC
Table of Contents
Foreword ... 4
Introduction ... 5
1 Scope ... 7
2 Normative references ... 8
3 Terms and definitions ... 8
4 Symbols and abbreviated terms ... 13
4.1 Physical quantities ... 13
4.2 Constants ... 13
4.3 Abbreviations ... 13
5 Measurement system specifications ... 14
5.1 General requirements ... 14
5.2 Phantom specifications (shell and liquid) ... 15
5.3 Measurement instrumentation system specifications ... 18
6 Protocol for SAR evaluation ... 20
6.1 Measurement preparation ... 20
6.2 Tests to be performed ... 34
6.3 Measurement procedure ... 39
6.4 Post-processing ... 44
7 Uncertainty estimation ... 45
7.1 General considerations ... 45
7.2 Components contributing to uncertainty ... 47
7.3 Uncertainty estimation ... 72
8 Measurement report ... 79
8.1 General ... 79
Annex A (informative) Phantom rationale ... 82
Annex B (normative) Measurement system verification ... 86
Annex C (informative) Fast SAR testing ... 98
Annex D (informative) Standard sources and phantoms for system validation
... 101
Annex E (informative) Example recipes for phantom tissue-equivalent liquids
... 108
Annex F (normative) SAR correction for deviations of complex permittivity from
targets ... 111
Annex G (informative) Hands-free kit testing ... 114
Annex H (informative) Skin SAR enhancement factor ... 117
Annex I (informative) Tissue-equivalent liquid dielectric property measurements
and measurement uncertainty estimation ... 121
Annex J (informative) Testing compliance for the exposure of the hand ... 123
Annex K (informative) Test reduction ... 125
Annex L (normative) Power scaling procedure ... 128
Annex M (informative) Rationale for probe parameters ... 130
Bibliography ... 133
Foreword
This Part is one of “Human exposure to radio frequency fields from hand-held and
body-mounted wireless communication devices - human models, instrumentation, and
procedures”, which is intended to consist of the following parts.
- Human exposure to radio frequency fields from hand-held and body- mounted
wireless communication devices - Human models, instrumentation, and
procedures - Part 1. Procedure to determine the specific absorption rate (SAR) for
hand-held devices used in close proximity to the ear (frequency range of 300 MHz
to 3 GHz);
- Human exposure to radio frequency fields from hand-held and body-mounted
wireless communication devices - Human models, instrumentation, and
procedures - Part 2. Procedure to determine the specific absorption rate (SAR) for
wireless communication devices used in close proximity to the human body
(frequency range of 30 MHz to 6 GHz).
This Part is identical to International Electrotechnical Commission IEC 62209-2 (1st
version, March 2010) “Human exposure to radio frequency fields from hand-held and
body-mounted wireless communication devices - Human models, instrumentation, and
procedures - Part 2. Procedure to determine the specific absorption rate (SAR) for
wireless communication devices used in close proximity to the human body (frequency
range of 30 MHz to 6 GHz)”.
This Part is proposed and is under the jurisdiction of China Communications Standards
Association.
Drafting organizations of this Part. Institute of Telecommunications under Ministry of
Industry and Information Technology of the PRC, China Mobile Communications
Corporation, China Telecommunications Corporation, Huawei Technology Co., Ltd.,
Nokia Communications Co., Ltd., Hangzhou Motorola Mobile Communication Device
Co., Ltd., Nanjing Ericsson Panda Communication Co., Ltd.
Main drafters of this Part. Qi Dianyuan, Lin Hao, Sun Qian, Lin Jun, Yang Jun.
Human exposure to radio frequency fields from hand-held and
body-mounted wireless communication devices - Human
models, instrumentation, and procedures - Part 2. Procedure
to determine the specific absorption rate (SAR) for wireless
communication devices used in close proximity to the human
body (frequency range of 30 MHz to 6 GHz)
1 Scope
This Part is applicable to any wireless communication device capable of transmitting
electromagnetic fields (EMF) intended to be used at a position near the human body,
in the manner described by the manufacturer, with the radiating part(s) of the device
at distances up to and including 200 mm from a human body, i.e. when held in the
hand or in front of the face, mounted on the body, combined with other transmitting or
non-transmitting devices or accessories (e.g. belt-clip, camera or Bluetooth add-on),
or embedded in garments. For transmitters used in close proximity to the human ear,
the procedures of YD/T 1644.1 (IEC 62209-1.2005) are applicable.
This Part is applicable for radio frequency exposure in the frequency range of 30 MHz
to 6 GHz, and may be used to measure simultaneous exposures from multiple radio
sources used in close proximity to human body. Definitions and evaluation procedures
are provided for the following general categories of device types. body-mounted, body-
supported, desktop, front-of-face, hand-held, laptop, limb-mounted, multi-band, push-
to-talk, clothing-integrated. The types of devices considered include but are not limited
to mobile telephones, cordless microphones, auxiliary broadcast devices and radio
transmitters in personal computers.
This Part gives guidelines for a reproducible and conservative measurement
methodology for determining the compliance of wireless devices with the SAR limits.
Because studies suggest that exclusion of features to represent a hand in human
models constitutes a conservative case scenario for SAR in the trunk and the head, a
representation of a hand is not included if the device is intended to be used next to the
head or supported on or near the torso [73], [80]. This Part does not apply for
exposures from transmitting or non-transmitting implanted medical devices. This Part
does not apply for exposure from devices at distances greater than 200 mm away from
the human body.
This Part makes cross-reference to YD/T 1644.1 (IEC 62209-1.2005) where complete
clauses or subclauses apply, along with any changes specified.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
YD/T 1644.1-2007 Human exposure to radio frequency fields from...
......
| Standard ID | YD/T 1644.2-2011 (YD/T1644.2-2011) | | Description (Translated English) | Human exposure to radio frequency fields from hand-held and body-mounted wireless communication devices-human models, instrumentation, and procedures. Part 2: Procedure to determine the specific absorption rate(SAR) for wireless communication devices used | | Sector / Industry | Telecommunication Industry Standard (Recommended) | | Classification of Chinese Standard | M03 | | Classification of International Standard | 33.100 | | Word Count Estimation | 87,841 | | Date of Issue | 2011-12-20 | | Date of Implementation | 2012-02-01 | | Quoted Standard | YD/T 1644.1-2007; ISO/IEC 17025-1999 | | Adopted Standard | IEC 62209-2-2010, IDT | | Drafting Organization | Telecommunications Research Institute of the Ministry of Industry and Information Technology | | Administrative Organization | China Communications Standards Association | | Regulation (derived from) | ?MIIT Announcement 2011 No.43 | | Summary | This standard applies to anything that can emit electromagnetic fields (EMF). The manner described by the manufacturer and which is close to the human body emitting portion is not more than 200mm from the wireless communication device when in use. Whether handheld or placed on the face before the way, or body-worn, integrate other transmitting or not transmitting equipment or accessories (eg belt clip, camera or Bluetooth), or implanted in the way of clothing. Part of the equipment used in the ear close to the transmitter may YD/T 1644. 1 (IEC 62209-1-2005) is required to test use. This section applies to the operating frequency range of 30MHz ~ 6GHz RF irradiation can also be used to measure simultaneously irradiating a plurality of radio emission sources close to the body. This section gives the following definition of the type of device and the evaluation process: body-worn, body-supported, desktop, placed face former type, handheld, placed knee style, limb wearable, multi-band, walkie-talkie type, Clothing integrated. Device types include but are not limited to mobile phones, cordless telephone, auxiliary equipment and radio broadcasting transmitters within the PC. This section gives an assessment can be repeated and conservative methods of measurement of wireless devices and the SAR limit compliance. Existing studies show that because the human body model does not include the characterization part can be given manually conserved in the case of a human torso and head SAR evaluation, if the device is expected to be closer to the head or torso trunk support or use, the human body model in the evaluation section does not include the characterization of manpower [73], [80]. This section does not apply to exposure assessment transmit or not transmit medical implant devices. |
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