02 Bluetooth Smart Module RF Exposure Info SAR Report 1 Branchpoint Technologies, .

Branchpoint Technologies, . Bluetooth Smart Module

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PCTEST ENGINEERING LABORATORY, INC.
7185 Oakland Mills Road, Columbia, MD 21046 USA
Tel. +1.410.290.6652 / Fax +1.410.290.6654
http://www.pctestlab.com
SAR EVALUATION REPORT
Applicant Name:
Branchpoint Technologies, Inc.
1 Technology Dr, Ste 1-811
Irvine, CA 92618
Date of Testing:
07/25/18
Test Site/Location:
PCTEST Lab, Columbia, MD, USA
Document Serial No.:
1M1808070152-R2
M odel :
AURA Antenna
M anuf act ur er :
BRANCHPOINT TECHNOLOGIES, INC.
DUT Type:
Wireless Power Transfer Device
FCC Rule Part(s):
CFR §2.1093
SAR
Device
Tx Frequency
1g Head
(W/kg)
AURA Antenna
13.56 MHz
Bluetooth
2402 - 2480 MHz
Simultaneous SAR per KDB 690783
D01v01r03:
1.06
N/A
1.10
Note: This revised Test Report (S/N: 1M1808070152-R2) supersedes and replaces the previously issued test report on the same subject
device for the same type of testing as indicated. Please discard or destroy the previously issued test report(s) and dispose of it accordingly.
I attest to the accuracy of data. All measurements reported herein were performed by me or were made under my supervision and are correct
to the best of my knowledge and belief. I assume full responsibility for the completeness of these measurements and vouch for the
qualifications of all persons taking them. Test results reported herein relate only to the item(s) tested.
The SAR Tick is an initiative of the Mobile & Wireless Forum (MWF). While a product may be considered eligible, use of the SAR Tick logo requires an agreement with the MWF. Further
details can be obtained by emailing: sartick@mwfai.info.
Approved by:
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Wireless Power Transfer Device
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REV 18.3 M
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including photocopying and microfilm, without permission in writing from PCTEST Engineering Laboratory, Inc. If you have any questions about this international copyright or have an enquiry about obtaining
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T A B L E
O F
C O N T E N T S
DEVICE UNDER TEST ................................................................................................................................ 3
INTRODUCTION .......................................................................................................................................... 5
SAR MEASUREMENT SETUP .................................................................................................................... 6
DASY E-FIELD PROBE SYSTEM................................................................................................................ 8
DOSIMETRIC ASSESSMENT ..................................................................................................................... 9
TEST CONFIGURATION POSITIONS ...................................................................................................... 10
RF EXPOSURE LIMITS ............................................................................................................................. 11
SYSTEM VERIFICATION ........................................................................................................................... 12
SAR DATA SUMMARY .............................................................................................................................. 13
10
FCC MULTI-TX AND ANTENNA SAR CONSIDERATIONS ...................................................................... 14
11
SAR MEASUREMENT VARIABILITY ........................................................................................................ 16
12
EQUIPMENT LIST ...................................................................................................................................... 17
13
MEASUREMENT UNCERTAINTIES.......................................................................................................... 18
14
CONCLUSION ............................................................................................................................................ 19
15
REFERENCES ........................................................................................................................................... 20
APPENDIX A:
SAR TEST PLOTS
APPENDIX B:
SAR DIPOLE VERIFICATION PLOTS
APPENDIX C:
PROBE AND DIPOLE CALIBRATION CERTIFICATES
APPENDIX D:
SAR TISSUE SPECIFICATIONS
APPENDIX E:
SAR SYSTEM VALIDATION
APPENDIX F:
DUT ANTENNA DIAGRAM & SAR TEST SETUP PHOTOGRAPHS
APPENDIX G:
ADDITIONAL SAR TEST CONSIDERATIONS
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including photocopying and microfilm, without permission in writing from PCTEST Engineering Laboratory, Inc. If you have any questions about this international copyright or have an enquiry about obtaining
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1
1.1
DEVICE UNDER TEST
Device Overview
This device has two integrated transmitters that can transmit simultaneously – a 13.56 MHz transmitter and a
Bluetooth transmitter (FCC ID: 2AJW602).
1.2
Technology
Operating Modes
Tx Frequency
AURA Antenna
Bluetooth LE
Power Transfer
Data
13.56 MHz
2402-2480 MHz
Simultaneous Transmission Capabilities
According to FCC KDB Publication 447498 D01v06, transmitters are considered to be transmitting simultaneously
when there is overlapping transmission, with the exception of transmissions during network hand-offs with
maximum hand-off duration less than 30 seconds.
This device contains multiple transmitters that may operate simultaneously, and therefore requires a simultaneous
transmission analysis according to FCC KDB Publication 447498 D01v06 4.3.2 procedures.
Table 1-1
Simultaneous Transmission Scenarios
Capable Transmit Configuration
No.
1.3
AURA Antenna + Bluetooth
Head
Yes
Miscellaneous SAR Test Considerations
(A) BT
Per FCC KDB 447498 D01v06, the 1g SAR exclusion threshold for distances <50mm is defined by the
following equation:
Based on the maximum conducted power of Bluetooth (rounded to the nearest mW) and the antenna to user
separation distance, Bluetooth head SAR was not required; [(1mW/ 5mm)* √2.480] = 0.31 < 3.0. Per KDB
Publication 447498 D01v06, the maximum power of the channel was rounded to the nearest mW before
calculation.
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including photocopying and microfilm, without permission in writing from PCTEST Engineering Laboratory, Inc. If you have any questions about this international copyright or have an enquiry about obtaining
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(B) Additional SAR Test Considerations
Additional SAR testing was performed to evaluate impact from the proximity of AURA sensor receiver. A nonstandard setup was used for SAR testing based on guidance from the FCC. The operational description
contains additional information.
Device was configured at the maximum field level and duty cycle via manufacturer test software to represent
a conservative test condition. Actual exposure is expected to be lower due to limitations on power output.
1.4
•
•
•
•
•
1.5
Guidance Applied
FCC KDB Publication 447498 D01v06, Section 4.4 (General SAR Guidance)
FCC KDB Publication 865664 D01v01r04 (SAR Measurements up to 6 GHz)
FCC KDB Publication 680106 D01v02 (Wireless Charging)
February 17th, 2016 TCB Conference Call (SAR Measurements < 100 MHz)
April 2016 TCB Workshop Notes (SAR Measurements < 100 MHz)
Device Serial Numbers
The manufacturer has confirmed that the device tested have the same physical, mechanical and thermal
characteristics and are within operational tolerances expected for production units.
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additional rights to this report or assembly of contents thereof, please contact INFO@PCTEST.COM.
2
INTRODUCTION
The FCC and Innovation, Science, and Economic Development Canada have adopted the guidelines for
evaluating the environmental effects of radio frequency (RF) radiation in ET Docket 93-62 on Aug. 6, 1996 and
Health Canada Safety Code 6 to protect the public and workers from the potential hazards of RF emissions due to
FCC-regulated portable devices. [1]
The safety limits used for the environmental evaluation measurements are based on the criteria published by the
American National Standards Institute (ANSI) for localized specific absorption rate (SAR) in IEEE/ANSI C95.11992 Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3
kHz to 300 GHz [3] and Health Canada RF Exposure Guidelines Safety Code 6 [22]. The measurement
procedure described in IEEE/ANSI C95.3-2002 Recommended Practice for the Measurement of Potentially
Hazardous Electromagnetic Fields - RF and Microwave [4] is used for guidance in measuring the Specific
Absorption Rate (SAR) due to the RF radiation exposure from the Equipment Under Test (EUT). These criteria for
SAR evaluation are similar to those recommended by the International Committee for Non-Ionizing Radiation
Protection (ICNIRP) in Biological Effects and Exposure Criteria for Radiofrequency Electromagnetic Fields,”
Report No. Vol 74. SAR is a measure of the rate of energy absorption due to exposure to an RF transmitting
source. SAR values have been related to threshold levels for potential biological hazards.
2.1
SAR Definition
Specific Absorption Rate is defined as the time derivative (rate) of the incremental energy (dU) absorbed by
(dissipated in) an incremental mass (dm) contained in a volume element (dV) of a given density (ρ). It is also
defined as the rate of RF energy absorption per unit mass at a point in an absorbing body (see Equation 2-1).
Equation 2-1
SAR Mathematical Equation
SAR =
d  dU  d  dU 



=
dt  dm  dt  ρdv 
SAR is expressed in units of Watts per Kilogram (W/kg).
σ ⋅ E2
SAR =
ρ
where:
σ = conductivity of the tissue-simulating material (S/m)
ρ = mass density of the tissue-simulating material (kg/m3)
E = Total RMS electric field strength (V/m)
NOTE: The primary factors that control rate of energy absorption were found to be the wavelength of the incident field in relation to the
dimensions and geometry of the irradiated organism, the orientation of the organism in relation to the polarity of field vectors, the presence of
reflecting surfaces, and whether conductive contact is made by the organism with a ground plane.[6]
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including photocopying and microfilm, without permission in writing from PCTEST Engineering Laboratory, Inc. If you have any questions about this international copyright or have an enquiry about obtaining
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3
3.1
SAR MEASUREMENT SETUP
Robotic System
Measurements are performed using the DASY5 automated dosimetric assessment system. The DASY5 is made
by Schmid & Partner Engineering AG (SPEAG) in Zurich, Switzerland and consists of a high precision robotics
system (Staubli), robot controller, desktop computer, near-field probe, probe alignment sensor, and the SAM
phantom containing the head or body equivalent material. The robot is a six-axis industrial robot, performing
precise movements to position the probe to the location (points) of maximum electromagnetic field (EMF) (see
Figure 3-1).
3.2
System Hardware
A cell controller system contains the power supply, robot controller, teach pendant (Joystick), and a remote
control used to drive the robot motors. The PC consists of the SAR Measurement Software DASY52, A/D
interface card, monitor, mouse, and keyboard. The Staubli Robot is connected to the cell controller to allow
software manipulation of the robot. A data acquisition electronic (DAE) circuit that performs the signal
amplification, signal multiplexing, A/D conversion, offset measurements, mechanical surface detection, collision
detection, etc. is connected to the Electro-optical coupler (EOC). The EOC performs the conversion from the
optical into digital electric signal from the DAE and transfers data to the PC card.
3.3
System Electronics
Figure 3-1
SAR Measurement System Setup
The DAE consists of a highly sensitive electrometer-grade auto-zeroing preamplifier, a channel and gainswitching multiplexer, a fast 16 bit AD-converter and a command decoder and control logic unit. Transmission to
the PC-card is accomplished through an optical downlink for data and status information and an optical uplink for
commands and clock lines. The mechanical probe mounting device includes two different sensor systems for
frontal and sidewise probe contacts. They are also used for mechanical surface detection and probe collision
detection. The robot uses its own controller with a built in VME-bus computer.
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including photocopying and microfilm, without permission in writing from PCTEST Engineering Laboratory, Inc. If you have any questions about this international copyright or have an enquiry about obtaining
additional rights to this report or assembly of contents thereof, please contact INFO@PCTEST.COM.
3.4
Automated Test System Specifications
Test Software:
Robot:
Repeatability:
No. of Axes:
SPEAG DASY52 version 52.8 Measurement Software
Stäubli Unimation Corp. Robot RX60L, Robot TX90XL
0.02 mm
Data Acquisition Electronic System (DAE)
Data Converter
Features:
Software:
Connecting Lines:
Signal Amplifier, multiplexer, A/D converter & control logic
SEMCAD X software
Optical Downlink for data and status info
Optical upload for commands and clock
PC Interface Card
Function:
Link to DAE
16-bit A/D converter for surface detection system
Two Serial & Ethernet link to robotics
Direct emergency stop output for robot
Phantom
Type:
Shell Material:
Thickness:
ELI V4.0/5.0/6.0
Composite
2.0 ± 0.2 mm
ELI is constructed of a fiberglass shell and can be
integrated into standard phantom tables. ELI Phantom is
made for compliance testing of handheld and body-mounted
wireless devices. ELI is fully compatible with the IEC 622092 standard and all known tissue simulating liquids.
Reference markings on the phantom allow installation of the
complete setup, including all predefined phantom positions
and measurement grids, by teaching three points. The shell
phantom has a 2 mm shell thickness.
Figure 3-2
ELI Phantoms
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4
DASY E-FIELD PROBE SYSTEM
4.1
Probe Measurement System
Figure 4-1
SAR System
4.2
The SAR measurements were conducted with the dosimetric probe designed in the
classical triangular configuration (see Figure 4-3) and optimized for dosimetric evaluation.
The probe is constructed using the thick film technique; with printed resistive lines on
ceramic substrates. The probe is equipped with an optical multi-fiber line ending at the
front of the probe tip. It is connected to the EOC box on the robot arm and provides an
automatic detection of the phantom surface. Half of the fibers are connected to a pulsed
infrared transmitter, the other half to a synchronized receiver. As the probe approaches
the surface, the reflection from the surface produces a coupling from the transmitting to the
receiving fibers. This reflection increases first during the approach, reaches maximum and
then decreases. If the probe is flatly touching the surface, the coupling is zero. The
distance of the coupling maximum to the surface is independent of the surface reflectivity
and largely independent of the surface to probe angle. The DASY5 software reads the
reflection during a software approach and looks for the maximum using a 2nd order curve
fitting. The approach is stopped at reaching the maximum.
Probe Specifications
Model(s):
Frequency
Range:
Calibration:
Linearity:
Dynamic Range:
Probe Length:
Probe Tip
Length:
Body Diameter:
Tip Diameter:
Tip-Center:
Application:
EX3DV4
4 MHz – 6.0 GHz (EX3DV4)
In head and body simulating tissue at Frequencies
from 4 up to 6000MHz
± 0.2 dB (4 MHz to 6 GHz) for EX3DV4
10 mW/kg – 100 W/kg
337 mm
Figure 4-2
Near-Field Probe
9 mm
10 mm
2.5 mm for EX3DV4
1 mm for EX3DV4
SAR Dosimetry Testing
Compliance tests of mobile phones
Dosimetry in strong gradient fields
Figure 4-3
Triangular Probe
Configuration
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5
5.1
DOSIMETRIC ASSESSMENT
Measurement Procedure
The evaluation was performed using the following procedure compliant to FCC
KDB Publication 865664 D01v01r04 and IEEE 1528-2013:
1. The SAR distribution at the exposed side of the head or body was measured
at a distance no greater than 5.0 mm from the inner surface of the shell. The
area covered the entire dimension of the device-head and body interface and
the horizontal grid resolution was determined per FCC KDB Publication
865664 D01v01r04 (See Table 5-1) and IEEE 1528-2013.
2. The point SAR measurement was taken at the maximum SAR region
determined from Step 1 to enable the monitoring of SAR fluctuations/drifts during
the 1g/10g cube evaluation. SAR at this fixed point was measured and used as a
reference value.
Figure 5-1
Sample SAR Area
Scan
3. Based on the area scan data, the peak of the region with maximum SAR was determined by spline
interpolation. Around this point, a volume was assessed according to the measurement resolution and volume
size requirements of FCC KDB Publication 865664 D01v01r04 (See Table 5-1) and IEEE 1528-2013. On the
basis of this data set, the spatial peak SAR value was evaluated with the following procedure (see references
or the DASY manual online for more details):
a. SAR values at the inner surface of the phantom are extrapolated from the measured values along the
line away from the surface with spacing no greater than that in Table 5-1. The extrapolation was based on
a least-squares algorithm. A polynomial of the fourth order was calculated through the points in the z-axis
(normal to the phantom shell).
b. After the maximum interpolated values were calculated between the points in the cube, the SAR was
averaged over the spatial volume (1g or 10g) using a 3D-Spline interpolation algorithm. The 3D-spline is
composed of three one-dimensional splines with the “Not a knot” condition (in x, y, and z directions). The
volume was then integrated with the trapezoidal algorithm. One thousand points (10 x 10 x 10) were
obtained through interpolation, in order to calculate the averaged SAR.
c. All neighboring volumes were evaluated until no neighboring volume with a higher average value was
found.
4. The SAR reference value, at the same location as step 2, was re-measured after the zoom scan was complete
to calculate the SAR drift. If the drift deviated by more than 5%, the SAR test and drift measurements were
repeated.
Table 5-1
Area and Zoom Scan Resolutions per FCC KDB Publication 865664 D01v01r04*
Frequency
Maximum Area Scan Maximum Zoom Scan
Resolution (mm)
Resolution (mm)
(∆x area, ∆yarea)
(∆x zoom, ∆yzoom)
Maximum Zoom Scan Spatial
Resolution (mm)
Uniform Grid
Graded Grid
Minimum Zoom Scan
Volume (mm)
(x,y,z)
∆zzoom(n)
∆zzoom(1)*
∆zzoom(n>1)*
≤ 2 GHz
≤ 15
≤8
≤5
≤4
≤ 1.5*∆zzoom(n-1)
≥ 30
2-3 GHz
≤ 12
≤5
≤5
≤4
≤ 1.5*∆zzoom(n-1)
≥ 30
3-4 GHz
≤ 12
≤5
≤4
≤3
≤ 1.5*∆zzoom(n-1)
≥ 28
4-5 GHz
≤ 10
≤4
≤3
≤ 2.5
≤ 1.5*∆zzoom(n-1)
≥ 25
5-6 GHz
≤ 10
≤4
≤2
≤2
≤ 1.5*∆zzoom(n-1)
≥ 22
*Also compliant to IEEE 1528-2013 Table 6
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6
6.1
TEST CONFIGURATION POSITIONS
Device Holder
The device holder is made out of low-loss POM material having the following dielectric parameters: relative
permittivity ε = 3 and loss tangent δ = 0.02.
6.2
Position of the device under test in relation to the phantom
Per FCC Guidance, the bottom of DUT was tested against a flat phantom filled with head simulant tissue. The
DUT was positioned at direct contact to the bottom of the flat phantom so that the peak spatial-average SAR can
be measured. Per the manufacturer, the only expected exposure condition is the bottom surface for head SAR.
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7
RF EXPOSURE LIMITS
7.1
Uncontrolled Environment
UNCONTROLLED ENVIRONMENTS are defined as locations where there is the exposure of individuals who
have no knowledge or control of their exposure. The general population/uncontrolled exposure limits are
applicable to situations in which the general public may be exposed or in which persons who are exposed as a
consequence of their employment may not be made fully aware of the potential for exposure or cannot exercise
control over their exposure. Members of the general public would come under this category when exposure is not
employment-related; for example, in the case of a wireless transmitter that exposes persons in its vicinity.
7.2
Controlled Environment
CONTROLLED ENVIRONMENTS are defined as locations where there is exposure that may be incurred by
persons who are aware of the potential for exposure, (i.e. as a result of employment or occupation). In general,
occupational/controlled exposure limits are applicable to situations in which persons are exposed as a
consequence of their employment, who have been made fully aware of the potential for exposure and can
exercise control over their exposure. This exposure category is also applicable when the exposure is of a
transient nature due to incidental passage through a location where the exposure levels may be higher than the
general population/uncontrolled limits, but the exposed person is fully aware of the potential for exposure and can
exercise control over his or her exposure by leaving the area or by some other appropriate means.
Table 7-1
SAR Human Exposure Specified in ANSI/IEEE C95.1-1992 and Health Canada Safety Code 6
1.
2.
3.
The Spatial Peak value of the SAR averaged over any 1 gram of tissue (defined as a tissue volume in the shape of a cube) and over
the appropriate averaging time.
The Spatial Average value of the SAR averaged over the whole body.
The Spatial Peak value of the SAR averaged over any 10 grams of tissue (defined as a tissue volume in the shape of a cube) and
over the appropriate averaging time.
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8
SYSTEM VERIFICATION
8.1
Tissue Verification
Table 8-1
Measured Tissue Properties
Calibrated for
Measured
Measured
Tissue Temp
Tissue
During Calibration Frequency Conductivity,
Tests
Type
(˚C)
(MHz)
Performed on:
σ (S/m)
13H
7/25/2018
12
13
14
22.7
Measured
Dielectric
Constant, ε
TARGET
Conductivity,
σ (S/m)
TARGET
Dielectric
Constant, ε
% dev σ
% dev ε
52.990
53.074
53.152
0.750
0.750
0.750
55.500
55.500
55.500
-0.80%
-0.80%
-0.80%
-4.52%
-4.37%
-4.23%
0.744
0.744
0.744
The above measured tissue parameters were used in the DASY software. The DASY software was used to
perform interpolation to determine the dielectric parameters at the SAR test device frequencies (per KDB
Publication 865664 D01v01r04 and IEEE 1528-2013 6.6.1.2). The tissue parameters listed in the SAR test plots
may slightly differ from the table above due to significant digit rounding in the software.
Per FCC Guidance, the IEC 30 MHz target values were used for the evaluation.
8.2
Test System Verification
Prior to SAR assessment, the system is verified to ±10% of the SAR measurement on the Confined Loop Antenna
at the time of calibration by the calibration facility.
Table 8-2
System Verification Results
System Verification
TARGET & MEASURED
SAR
Tissue
System Frequency
(MHz)
13
Tissue
Type
Date:
HEAD
07/25/2018
Amb.
Temp
(°C)
Liquid
Temp
(°C)
22.7
22.7
Input
Source Probe
Power
SN
SN
(W)
1.000
1002
3914
Measured
SAR1g
1 W Target
SAR1g
(W/kg)
0.541
(W/kg)
1W
Normalized
SAR1g (W/kg)
Deviation1g
(%)
0.553
0.541
-2.17%
Figure 8-1
System Verification Setup Diagram
Signal Generator
Power Meter
Confined Loop
Antenna
Amplifier
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9
9.1
SAR DATA SUMMARY
Standalone Head SAR Data
Table 9-1
AURA Antenna Head SAR Data
MEASUREMENT RESULTS
FREQUENCY
Device
Power Drift [dB]
Spacing
MHz
Device
Serial
Number
Duty
Cycle
Side
Measured
SAR (1g)
Plot #
(W/kg)
13.56
AURA Antenna
-0.12
0 mm
RD-0059
1:1
bottom
1.060
13.56
AURA Antenna
-0.08
0 mm
RD-0059
1:1
bottom
1.040
A1
Head
1.6 W/kg (mW/g)
ANSI / IEEE C95.1 1992 - SAFETY LIMIT
Spatial Peak
averaged over 1 gram
Uncontrolled Exposure/General Population
Note: Blue Entry indicates variability data.
9.2
SAR Test Notes
General Notes:
1. The test data reported are the worst-case SAR values according to test procedures specified from FCC
KDB Publication 447498 D01v06, FCC KDB Publication 865664 D01v01r04, February 17th 2016 TCB
Conference Call, April 2016 TCB Workshop Notes.
2. Liquid tissue depth was at least 15.0 cm for all frequencies.
3. The manufacturer has confirmed that the device(s) tested have the same physical, mechanical and
thermal characteristics and are within operational tolerances expected for production units.
4. Device was configured at the maximum field level via manufacturer test software to represent a
conservative test condition.
5. SAR test was performed without the AURA sensor receiver. Additional SAR test per FCC guidance was
included to Appendix G.
6. Per FCC KDB 865664 D01v01r04, variability SAR tests were performed when the measured SAR results
for a frequency band were greater than or equal to 0.8 W/kg. Repeated SAR measurements are
highlighted in the tables above for clarity.
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10
FCC MULTI-TX AND ANTENNA SAR CONSIDERATIONS
10.1
Introduction
The following procedures adopted from FCC KDB Publication 447498 D01v06 are applicable to devices with builtin unlicensed transmitters such as 802.11 and Bluetooth devices which may simultaneously transmit with the
licensed transmitter.
10.2
Simultaneous Transmission Procedures
This device contains transmitters that may operate simultaneously. Therefore, simultaneous transmission analysis
is required. Per FCC KDB Publication 447498 D01v06 4.3.2 and IEEE 1528-2013 Section 6.3.4.1.2, simultaneous
transmission SAR test exclusion may be applied when the sum of the 1g SAR for all the simultaneous transmitting
antennas in a specific a physical test configuration is ≤1.6 W/kg. The different test positions in an exposure
condition may be considered collectively to determine SAR test exclusion according to the sum of 1g or 10g SAR.
When standalone SAR is not required to be measured, per FCC KDB 447498 D01v06 4.3.2 b), the following
equation must be used to estimate the standalone 1g SAR for simultaneous transmission assessment involving
that transmitter.
This device has two integrated transmitters that can transmit simultaneously – a 13.56 MHz transmitter and a
Bluetooth transmitter (FCC ID: 2AJW602). The maximum allowed power of 2AJW602 transmitter was used to
estimate the Bluetooth LE SAR for simultaneous transmission analysis.
Table 10-1
Estimated SAR
Mode
Bluetooth LE
Frequency
Maximum Separation Estimated
Allowed
Distance
SAR
Power
(Head)
(Head)
[MHz]
[dBm]
[mm]
[W/kg]
2480
-1.85
0.042
Note: Per KDB Publication 447498 D01v06, the maximum power of the channel was rounded to the nearest mW
before calculation.
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10.3
Head SAR Simultaneous Transmission Analysis
Table 10-2
Simultaneous Transmission Scenario with 2.4 GHz WLAN (Head)
Exposure
Condition
AURA
Antenna
Bluetooth
SAR (W/kg)
Σ SAR
(W/kg)
1+2
Head SAR
1.060
0.042
1.102
Note: Bluetooth LE SAR was not required to be measured per FCC KDB Publication 447498 D01v06. Estimated
SAR results were used in the above table to determine simultaneous transmission SAR test excluded.
10.4
Simultaneous Transmission Conclusion
The above numerical summed SAR results for all the worst-case simultaneous transmission conditions were
below the SAR limit. Therefore, the above analysis is sufficient to determine that simultaneous transmission cases
will not exceed the SAR limit and therefore no measured volumetric simultaneous SAR summation is required per
FCC KDB Publication 447498 D01v06 and IEEE 1528-2013 Section 6.3.4.1.2.
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11
SAR MEASUREMENT VARIABILITY
11.1
Measurement Variability
Per FCC KDB Publication 865664 D01v01r04, SAR measurement variability was assessed for each frequency
band, which was determined by the SAR probe calibration point and tissue-equivalent medium used for the
device measurements. When both head and body tissue-equivalent media were required for SAR measurements
in a frequency band, the variability measurement procedures were applied to the tissue medium with the highest
measured SAR, using the highest measured SAR configuration for that tissue-equivalent medium. These
additional measurements were repeated after the completion of all measurements requiring the same head or
body tissue-equivalent medium in a frequency band. The test device was returned to ambient conditions (normal
room temperature) with the battery fully charged before it was re-mounted on the device holder for the repeated
measurement(s) to minimize any unexpected variations in the repeated results.
SAR Measurement Variability was assessed using the following procedures for each frequency band:
1) When the original highest measured SAR is ≥ 0.80 W/kg, the measurement was repeated once.
2) A second repeated measurement was performed only if the ratio of largest to smallest SAR for the
original and first repeated measurements was > 1.20 or when the original or repeated measurement was
≥ 1.45 W/kg (~ 10% from the 1g SAR limit).
3) A third repeated measurement was performed only if the original, first or second repeated measurement
was ≥ 1.5 W/kg and the ratio of largest to smallest SAR for the original, first and second repeated
measurements is > 1.20.
4) Repeated measurements are not required when the original highest measured SAR is < 0.80 W/kg
5) When 10g SAR measurement is considered, a factor of 2.5 is applied to the thresholds above.
Table 11-1
Head SAR Measurement Variability Results
HEAD VARIABILITY RESULTS
FREQUENCY
Device
Side
Test
Position
MHz
13.00
AURA Antenna 13.56 MHz
bottom
0 mm
ANSI / IEEE C95.1 1992 - SAFETY LIMIT
Spatial Peak
Uncontrolled Exposure/General
11.2
Measured
SAR (1g)
1st
Repeated
SAR (1g)
(W/kg)
(W/kg)
1.060
1.040
Ratio
2nd
Repeated
SAR (1g)
Ratio
(W/kg)
1.02
N/A
3rd
Repeated
SAR (1g)
Ratio
(W/kg)
N/A
N/A
Head
1.6 W/kg (mW/g)
averaged over 1 gram
Measurement Uncertainty
The measured 1g SAR was <1.5 W/kg and measured 10g SAR was <3.75 W/kg for all frequency bands.
Therefore, per KDB Publication 865664 D01v01r04, the extended measurement uncertainty analysis per IEEE
1528-2013 was not required.
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N/A
12
EQUIPMENT LIST
Manufacturer
Model
Description
Cal Date
Cal Interval
Cal Due
Serial Number
Agilent
Agilent
Agilent
Agilent
Agilent
Control Company
Control Company
Mini Circuits
Mini Circuits
Mini-Circuits
Narda
Narda
Pasternack
Pasternack
SPEAG
SPEAG
SPEAG
SPEAG
Mini-Circuits
8594A
8753ES
N5182A
N9020A
N9030A
4040
4352
PWR-4GHS
PWR-4GHS
NLP-1200+
4772-3
BW-S3W2
NC-100
PE2208-6
DAK-12
CLA-13
EX3DV4
DAE4
TVA-11-422
(9kHz-2.9GHz) Spectrum Analyzer
S-Parameter Vector Network Analyzer
MXG Vector Signal Generator
MXA Signal Analyzer
PXA Signal Analyzer (44GHz)
Therm./ Clock/ Humidity Monitor
Ultra Long Stem Thermometer
USB Power Sensor
USB Power Sensor
Low Pass Filter DC to 1000 MHz
Attenuator (3dB)
Attenuator (3dB)
Torque Wrench
Bidirectional Coupler
Dielectric Assessment Kit (10MHz - 3GHz)
Confined Loop Antenna
SAR Probe
Dasy Data Acquisition Electronics
RF Power Amp
N/A
8/17/2017
11/1/2017
1/24/2018
5/25/2018
1/8/2018
1/8/2018
1/20/2018
1/22/2018
CBT
CBT
CBT
4/18/2018
CBT
3/13/2018
9/14/2017
2/14/2018
2/15/2018
CBT
N/A
Annual
Annual
Annual
Annual
Annual
Annual
Annual
Annual
N/A
N/A
N/A
Annual
N/A
Annual
Annual
Annual
Annual
N/A
N/A
8/17/2018
11/1/2018
1/24/2019
5/25/2019
1/8/2019
1/8/2019
1/20/2019
1/22/2019
CBT
CBT
CBT
4/18/2019
CBT
3/13/2019
9/14/2018
2/14/2019
2/15/2019
CBT
3051A00187
MY40003841
MY47420603
US46470561
MY52350166
160473909
160508097
11710030063
11710030062
N/A
9406
120
1445
N/A
1102
1002
3914
665
QA1303002
Note: CBT (Calibrated Before Testing). Prior to testing, the measurement paths containing a cable, amplifier, attenuator, coupler or filter were
connected to a calibrated source (i.e. a signal generator) to determine the losses of the measurement path. The power meter offset was then
adjusted to compensate for the measurement system losses. This level offset is stored within the power meter before measurements are
made. This calibration verification procedure applies to the system verification and output power measurements. The calibrated reading is
then taken directly from the power meter after compensation of the losses for all final power measurements.
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13
MEASUREMENT UNCERTAINTIES
Tol .
Prob.
(± %)
Di st .
e=
ci
ci
1g m
10 g ms
f(d,k)
Unc e rt a i nt y C ompone nt
Di v .
h=
i=
c x f/e
c x g/e
1g m
10g ms
ui
ui
(± %)
(± %)
vi
Measurement System
Probe Calibration
6.55
1.0
1.0
6.6
6.6
∞
Axial Isotropy
0.25
0.7
0.7
0.2
0.2
∞
Hemishperical Isotropy
1.3
0.7
0.7
0.9
0.9
∞
Boundary Effect
2.0
1.73
1.0
1.0
1.2
1.2
∞
Linearity
0.3
1.0
1.0
0.3
0.3
∞
∞
System Detection Limits
0.25
1.73
1.0
1.0
0.1
0.1
Readout Electronics
0.3
1.0
1.0
0.3
0.3
∞
Response Time
0.8
1.73
1.0
1.0
0.5
0.5
∞
Integration Time
2.6
1.73
1.0
1.0
1.5
1.5
∞
RF Ambient Conditions - Noise
3.0
1.73
1.0
1.0
1.7
1.7
∞
RF Ambient Conditions - Reflections
3.0
1.73
1.0
1.0
1.7
1.7
∞
Probe Positioner Mechanical Tolerance
0.4
1.73
1.0
1.0
0.2
0.2
∞
Probe Positioning w/ respect to Phantom
6.7
1.73
1.0
1.0
3.9
3.9
∞
Extrapolation, Interpolation & Integration algorithms for
Max. SAR Evaluation
4.0
1.73
1.0
1.0
2.3
2.3
∞
Test Sample Related
2.7
1.0
1.0
2.7
2.7
35
1.67
5.0
0.0
1.73
1.73
1.0
1.0
1.0
1.0
1.0
1.0
1.7
2.9
0.0
1.7
2.9
0.0
∞
∞
Phantom Uncertainty (Shape & Thickness tolerances)
7.6
1.73
1.0
1.0
4.4
4.4
∞
Liquid Conductivity - measurement uncertainty
4.2
0.78
0.71
3.3
3.0
10
Liquid Permittivity - measurement uncertainty
4.1
0.23
0.26
1.0
1.1
10
Liquid Conductivity - Temperature Uncertainty
3.4
1.73
0.78
0.71
1.5
1.4
∞
Liquid Permittivity - Temperature Unceritainty
0.6
1.73
0.23
0.26
0.1
0.1
∞
Liquid Conductivity - deviation from target values
5.0
1.73
0.64
0.43
1.8
1.2
∞
Liquid Permittivity - deviation from target values
5.0
1.73
0.60
0.49
1.7
1.4
∞
60
Test Sample Positioning
Device Holder Uncertainty
Output Power Variation - SAR drift measurement
SAR Scaling
Phantom & Tissue Parameters
Combined Standard Uncertainty (k=1)
RSS
11.5
11.3
Expanded Uncertainty
k=2
23.0
22.6
(95% CONFIDENCE LEVEL)
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14
CONCLUSION
14.1
Measurement Conclusion
The SAR evaluation indicates that the EUT complies with the RF radiation exposure limits of the FCC and
Innovation, Science, and Economic Development Canada, with respect to all parameters subject to this test.
These measurements were taken to simulate the RF effects of RF exposure under worst-case conditions. Precise
laboratory measures were taken to assure repeatability of the tests. The results and statements relate only to the
item(s) tested.
Please note that the absorption and distribution of electromagnetic energy in the body are very complex
phenomena that depend on the mass, shape, and size of the body, the orientation of the body with respect to the
field vectors, and the electrical properties of both the body and the environment. Other variables that may play a
substantial role in possible biological effects are those that characterize the environment (e.g. ambient
temperature, air velocity, relative humidity, and body insulation) and those that characterize the individual (e.g.
age, gender, activity level, debilitation, or disease). Because various factors may interact with one another to vary
the specific biological outcome of an exposure to electromagnetic fields, any protection guide should consider
maximal amplification of biological effects as a result of field-body interactions, environmental conditions, and
physiological variables. [3]
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15
REFERENCES
[1]
Federal Communications Commission, ET Docket 93-62, Guidelines for Evaluating the Environmental Effects of
Radiofrequency Radiation, Aug. 1996.
[2]
ANSI/IEEE C95.1-2005, American National Standard safety levels with respect to human exposure to radio frequency
electromagnetic fields, 3kHz to 300GHz, New York: IEEE, 2006.
[3]
ANSI/IEEE C95.1-1992, American National Standard safety levels with respect to human exposure to radio frequency
electromagnetic fields, 3kHz to 300GHz, New York: IEEE, Sept. 1992.
[4]
ANSI/IEEE C95.3-2002, IEEE Recommended Practice for the Measurement of Potentially Hazardous Electromagnetic
Fields - RF and Microwave, New York: IEEE, December 2002.
[5]
IEEE Standards Coordinating Committee 39 –Standards Coordinating Committee 34 – IEEE Std. 1528-2013, IEEE
Recommended Practice for Determining the Peak Spatial-Average Specific Absorption Rate (SAR) in the Human Head
from Wireless Communications Devices: Measurement Techniques.
[6]
NCRP, National Council on Radiation Protection and Measurements, Biological Effects and Exposure Criteria for
RadioFrequency Electromagnetic Fields, NCRP Report No. 86, 1986. Reprinted Feb. 1995.
[7]
T. Schmid, O. Egger, N. Kuster, Automated E-field scanning system for dosimetric assessments, IEEE Transaction on
Microwave Theory and Techniques, vol. 44, Jan. 1996, pp. 105-113.
[8]
K. Pokovic, T. Schmid, N. Kuster, Robust setup for precise calibration of E-field probes in tissue simulating liquids at
mobile communications frequencies, ICECOM97, Oct. 1997, pp. 1 -124.
[9]
K. Pokovic, T. Schmid, and N. Kuster, E-field Probe with improved isotropy in brain simulating liquids, Proceedings of the
ELMAR, Zadar, Croatia, June 23-25, 1996, pp. 172-175.
[10] Schmid & Partner Engineering AG, Application Note: Data Storage and Evaluation, June 1998, p2.
[11] V. Hombach, K. Meier, M. Burkhardt, E. Kuhn, N. Kuster, The Dependence of EM Energy Absorption upon Human
Modeling at 900 MHz, IEEE Transaction on Microwave Theory and Techniques, vol. 44 no. 10, Oct. 1996, pp. 18651873.
[12] N. Kuster and Q. Balzano, Energy absorption mechanism by biological bodies in the near field of dipole antennas above
300MHz, IEEE Transaction on Vehicular Technology, vol. 41, no. 1, Feb. 1992, pp. 17-23.
[13] G. Hartsgrove, A. Kraszewski, A. Surowiec, Simulated Biological Materials for Electromagnetic Radiation Absorption
Studies, University of Ottawa, Bioelectromagnetics, Canada: 1987, pp. 29-36.
[14] Q. Balzano, O. Garay, T. Manning Jr., Electromagnetic Energy Exposure of Simulated Users of Portable Cellular
Telephones, IEEE Transactions on Vehicular Technology, vol. 44, no.3, Aug. 1995.
[15] W. Gander, Computermathematick, Birkhaeuser, Basel, 1992.
[16] W.H. Press, S.A. Teukolsky, W.T. Vetterling, and B.P. Flannery, Numerical Recipes in C, The Art of Scientific
Computing, Second edition, Cambridge University Press, 1992.
[17] N. Kuster, R. Kastle, T. Schmid, Dosimetric evaluation of mobile communications equipment with known precision, IEEE
Transaction on Communications, vol. E80-B, no. 5, May 1997, pp. 645-652.
[18] CENELEC CLC/SC111B, European Prestandard (prENV 50166-2), Human Exposure to Electromagnetic Fields Highfrequency: 10kHz-300GHz, Jan. 1995.
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including photocopying and microfilm, without permission in writing from PCTEST Engineering Laboratory, Inc. If you have any questions about this international copyright or have an enquiry about obtaining
additional rights to this report or assembly of contents thereof, please contact INFO@PCTEST.COM.
[19] Prof. Dr. Niels Kuster, ETH, Eidgenössische Technische Hoschschule Zürich, Dosimetric Evaluation of the Cellular
Phone.
[20] IEC 62209-1, 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), Feb. 2005.
[21] Innovation, Science, Economic Development Canada RSS-102 Radio Frequency Exposure Compliance of
Radiocommunication Apparatus (All Frequency Bands) Issue 5, March 2015.
[22] Health Canada Safety Code 6 Limits of Human Exposure to Radio Frequency Electromagnetic Fields in the Frequency
Range from 3 kHz – 300 GHz, 2015
[23] FCC SAR Test Procedures for 2G-3G Devices, Mobile Hotspot and UMPC Devices KDB Publications 941225, D01-D07
[24] SAR Measurement Guidance for IEEE 802.11 Transmitters, KDB Publication 248227 D01
[25] FCC SAR Considerations for Handsets with Multiple Transmitters and Antennas, KDB Publications 648474 D03-D04
[26] FCC SAR Evaluation Considerations for Laptop, Notebook, Netbook and Tablet Computers, FCC KDB Publication
616217 D04
[27] FCC SAR Measurement and Reporting Requirements for 100MHz – 6 GHz, KDB Publications 865664 D01-D02
[28] FCC General RF Exposure Guidance and SAR Procedures for Dongles, KDB Publication 447498, D01-D02
[29] Anexo à Resolução No. 533, de 10 de Septembro de 2009.
[30] IEC 62209-2, 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), Mar. 2010.
[31] February 17th, 2016 TCB Conference Call
[32] April 2015 TCB Workshop RF Exposure
[33] April 2016 TCB Workshop Notes
Approved by:
Model: AURA ANTENNA
SAR EVALUATION REPORT
Quality Manager
Document S/N:
Test Dates:
DUT Type:
1M1808070152-R2
07/25/2018
Wireless Power Transfer Device
Page 21 of 21
© 2018 PCTEST Engineering Laboratory, Inc.
REV 18.3 M
01/30/2017
© 2018 PCTEST Engineering Laboratory, Inc. All rights reserved. Unless otherwise specified, no part of this report may be reproduced or utilized in any part, form or by any means, electronic or mechanical,
including photocopying and microfilm, without permission in writing from PCTEST Engineering Laboratory, Inc. If you have any questions about this international copyright or have an enquiry about obtaining
additional rights to this report or assembly of contents thereof, please contact INFO@PCTEST.COM.
APPENDIX A: SAR TEST DATA
© 2018 PCTEST Engineering Laboratory, Inc.
PCTEST ENGINEERING LABORATORY, INC.
DUT: AURA Antenna; Type: Wireless Power Transfer Device; Serial: RD-0059
Communication System: UID 0, CW; Frequency: 13.56 MHz; Duty Cycle: 1:1
Medium: 13 Head Medium parameters used:
f = 13.56 MHz; σ = 0.744 S/m; εr = 53.118; ρ = 1000 kg/m3
Phantom section: Flat Section; Space: 0.0 cm
Test Date: 07-25-2018; Ambient Temp: 22.7°C; Tissue Temp: 22.7°C
Probe: EX3DV4 - SN3914; ConvF(17.97, 17.97, 17.97); Calibrated: 2/14/2018;
Sensor-Surface: 1.4mm (Mechanical Surface Detection)
Electronics: DAE4 Sn1450; Calibrated: 11/9/2017
Phantom: ELI v5.0; Type: QDOVA002AA; Serial: TP: 1226
Measurement SW: DASY52, Version 52.10;SEMCAD X Version 14.6.10 (7417)
Area Scan (11x14x1): Measurement grid: dx=10mm, dy=10mm
Zoom Scan (10x9x8)/Cube 0: Measurement grid: dx=4mm, dy=4mm, dz=1.4mm; Graded Ratio: 1.4
Reference Value = 13.71 V/m; Power Drift = -0.12 dB
Peak SAR (extrapolated) = 4.17 W/kg
SAR(1 g) = 1.06 W/kg
0 dB = 2.20 W/kg = 3.42 dBW/kg
A1
APPENDIX B: SYSTEM VERIFICATION
© 2018 PCTEST Engineering Laboratory, Inc.
PCTEST ENGINEERING LABORATORY, INC.
DUT: CLA-13; Type: CLA-13; Serial: 1002
Communication System: UID 0, CW (0); Frequency: 13 MHz; Duty Cycle: 1:1
Medium: 13 Head; Medium; parameters used:
f = 13 MHz; σ = 0.744 S/m; εr = 53.074; ρ = 1000 kg/m3
Phantom section: Flat Section; Space: 0.0 cm
Test Date: 07-25-2018; Ambient Temp: 22.7°C; Tissue Temp: 22.7°C
Probe: EX3DV4 - SN3914; ConvF(17.97, 17.97, 17.97); Calibrated: 2/14/2018;
Sensor-Surface: 1.4mm (Mechanical Surface Detection)
Electronics: DAE4 Sn1450; Calibrated: 11/9/2017
Phantom: ELI v5.0; Type: QDOVA002AA; Serial: TP 1226
Measurement SW: DASY52, Version 52.10 (0);SEMCAD X Version 14.6.10 (7417)
13 MHz System Verification at 30.0 dBm (1000 mW)
Area Scan (19x19x1): Measurement grid: dx=15mm, dy=15mm
Zoom Scan (12x9x8)/Cube 0: Measurement grid: dx=4mm, dy=4mm, dz=1.4mm; Graded Grid: 1.4
Peak SAR (extrapolated) = 1.17 W/kg
SAR(1 g) = 0.541 W/kg
Deviation(1 g) = -2.17%
0 dB = 0.828 W/kg = -0.82 dBW/kg
B1
APPENDIX C: PROBE CALIBRATION
© 2018 PCTEST Engineering Laboratory, Inc.

Download: 02 Bluetooth Smart Module RF Exposure Info SAR Report 1 Branchpoint Technologies, .
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Document ID4004269
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Document DescriptionSAR Report 1
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeRF Exposure Info
Display FormatAdobe Acrobat PDF - pdf
Filesize128.51kB (1606316 bits)
Date Submitted2018-09-13 00:00:00
Date Available2018-09-18 00:00:00
Creation Date2018-09-13 12:34:22
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