RF Exposure for WPT

FCC ID: 2AN4YCTVK09

RF Exposure Info

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FCCID_4258343

SHENZHEN LCS COMPLIANCE TESTING LABORATORY TD. FCC ID: 2ANAYCTVKOs Report No.: LC$190415047AEA RF Exposure Evaluation Report 1. Product Information FCC ID: 2ANAYCTVKO3 Product Name WIRELESS CAR CHARGER MOUNT Model Number CTVkO3 Input: 5.0V ===2.0A4/9V ===2.0A /12V === 1.54 Power Supply Output: 5W/7.5W/10W Modulation Type Continuous Wave Frequency Range 110.0 — 205.0 KHz Operation Frequency 160.0 KHz Antenna Type Coil Antenna Hardware version V1.0 Software version V1.0 Accessories iPhone X Exposure category General population/uncontrolled environment EUT Type Production Unit Device Type Mobile Device 2. Evaluation Method Per KDB 680106 DO1 v03 Section 3. RF Exposure Requirements; 1) Consumer wireless power transfer devices approved under Part 18 in some cases have to demonstrate compliance with RF exposure requirements. The potential for exposure must be assessed according to the operating configurations of the wireless system and the exposure conditions of users and bystanders. RF exposure must be evaluated with the client device(s) being charged by the primary at maximum output power. The RF exposure requirements must be determined in conjunction with the device operating characteristics, according to the mobile and portable exposure requirements in Section 2.1091 and Section 2.1093 of the rules. SAR and MPE limits do not cover the frequency range for wireless power transfer applications which operate below 100 kHz and 300 kHz respectively; therefore, RF exposure compliance needs to be determined with respect to 1.1307 (c) and (d) of the FCC rules. 2) Based on the design and implementation of the power transfer application, it must be clearly identified if mobile or portable RF exposure conditions apply. Devices that are installed to provide separation of at least 20 cm from users and bystanders may qualify for mobile exposure conditions. For some conditions where users and bystanders may be exposed at closer than 20 cm, section 2.1091(d) (4) of the rules may apply. 3) For devices designed for typical desktop applications, such a wireless charging pads, RF exposure evaluation should be conducted assuming a user separation distance of 15 cm. E and H field strength measurements or numerical modeling may be used to demonstrate compliance. Measurements should be made from all sides and the top of the primary/client pair, with the 15 cm measured from the center of the probe(s) to the edge of the device. Emissions between 100 kHz to 300 kHz should be assessed versus the limits at 300 kHz in Table 1 of Section 1.1310: 614 V/m and 1.63 A/m. A KDBinquiry is required to determine the applicable exposure limits below 100 kHz. 4) Portable exposure conditions from 100 kHz to 6 GHz are determined with respect to SAR requirements. Existing SAR systems and test procedures are generally intended for measurements above 100 MHz. This report shall not be reproduced exceptin full, without the written approval ofShenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 10

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2AN4YCTVK09 Report No.: LCS190415047AEA While numerical modeling can be an alternative, the constraints of substantial computational resources at low frequencies could introduce further limitations. Under these circumstances, including operations below 100 kHz, the Commission may consider a combination of analytical analysis, field strength, radiated and conducted power measurements, in conjunction with some limited numerical modeling to assess compliance. 5) Depending on the operating frequency, existing SAR and MPE measurement procedures may be adapted to evaluate wireless power transfer devices for compliance with respect to mobile or portable exposure conditions. If the grantee or its test lab have any questions regarding RF exposure evaluation they should contact the FCC Laboratory with sufficient system operating configuration details to determine if RF exposure evaluation is necessary and, if required, how to apply specific test procedures. Below 100 MHz, when SAR testing is required and the device is operating at close proximity to persons, information on device design, implementation, operating configurations, exposure conditions of users and bystanders are needed to determine the evaluation and testing requirements. In addition, the influence of nearby objects may also need consideration according to the wireless power transfer system implementation; for example, the effects of placing the device, its coils or radiating elements on or near metallic surfaces 6) According to April 2018 TCB Workshop, No need to report E-field measurements. Only H-field required. 3. Evaluation Limit 3.1 Refer Evaluation Method ANSI C95.1–1999: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz. FCC KDB publication 680106 D01 RF Exposure Wireless Charging Apps v03: RF Exposure Considerations for Low Power Consumer Wireless Power Transfer Applications FCC CFR 47 part1 1.1310: Radiofrequency radiation exposure limits. FCC CFR 47 part2 2.1091: Radiofrequency radiation exposure evaluation: mobile devices FCC CFR 47 part 18.107:Indusial, Scientific, and Medical Equipment 3.2 Limit Limits for Maximum Permissible Exposure (MPE)/Controlled Exposure Frequency Electric Field Magnetic Field Power Density Averaging Time Range(MHz) Strength(V/m) Strength(A/m) (mW/cm²) (minute) Limits for Occupational/Controlled Exposure 0.3-3.0 614 1.63 *100 6 2 3.0-30 1842/f 4.89/f *900/f 6 30-300 61.4 0.163 1.0 6 300-1,500 / / f/300 6 1,500-100,000 / / 5 6 ___________________________________________________________________________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 10

SHENZ HEN CS COMPLIANCE TESTING LABORATORY [TD. ECC ID: 2ANeYerv k08 Report No.: LC§190415047A5A Limits for Maximum Permissible Exposure {MPE}/Uncontrolled Exposure Frequency Electric Field Magnetic Field Power Density Averaging Time Range(MHz) Strength{V/m) Strength(A/m) {mW/cm?) {minute) Limits for General Population/Uncontrolled Exposure 0.3—1.34 614 1.63 *100 30 1.34—30 824/f 2.19/f *180/f 30 30—300 27.5 0.073 0.2 30 300—1,500 / / 1/1500 30 1,500—100,000 / / 1.0 30 F=frequency in MHz *=Plane—wave equivalent power density According to FCC KDB 680106 DO1 v03 Section 3. RF Exposure Requirements clause 3 the Emission—Limits in the frequency range from 100 KHz to 300 KHz should be assessed versus the limits at 300 KHz in Table 1 of CFR 47 — Section1.310 as following {measured distance shall be 15cm from the center of the probe to the edge of the device}: E—filed H—filed B—filed Frequency V/m A/m uT 0.3 MHz — 3.0 MHz 614 1.613 2.0 3.0 MHz —30 MHz 824/1 {227.Szovc) 2.19/f (20.073 zove) — A KDB inquire was required to determine/confirm the applicable limits below 100 KHz. 4. Test Setup Diagram E A E—Field & B—Field Probe B gut C L1 0 C ism —> E F For mobile RF exposure condition, due to installation limitations no tests from the underside of the charging device are required. This report shall not be reproduced except in full, withoutthe written approval ofShenzhen LCS Compliance Testing Laboratory Ltd. Page3 of 10

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2AN4YCTVK09 Report No.: LCS190415047AEA 5. Test Equipment Equipment Manufacturer Model Serial no. Calibrated date Calibrated Due Exposure Level Tester Narda ELT-400 N-0713 2019-04-01 2020-03-31 B-Field Probe Narda ELT-400 M-1154 2019-04-10 2020-04-09 6. Uncertainties The probe uncertainties stated by the manufacturers are considered to be the main relevant and dominant issues. 6.1. Typical uncertainty of ELT-400 The uncertainties stated in this document have been determined according to user manual. They were estimated as expanded uncertainty obtained multiplying the standard by the coverage factor k=2. Corresponding to a confidence level of about 95%. The total uncertainty of the probe derived from typical contributions of linearity, anisotropy, frequency response, temperature, relative humidity and with/without contribution of uncertainty of calibration. Total expanded uncertainty (k=2) Without contribution of With contribution of Magnetic probe (1) Magnetic flux density uncertainty of calibration uncertainty of (%) calibration UT(%) 0.1 uT to < 0.3 uT 4.1 4.2 (2) 0.3 uT to < 10.0 uT 3.3 3.5 (2) Frequency at 50 Hz 10 uT to < 100 uT 3.7 4.3 (3) 100 uT to 500 uT 4.1 4.8 (4) Frequency from 40 to 10 0.1 uT to 0.3 uT 6.5 6.7 (5) kHz 0.3 uT to 10.0 uT 6.1 6.3 (5) (1) The temperature range is from -10 degree to 23 degree and relative humidity is from 20% to 50% (2) (5) The uncertainty or calibrated used is 1.5% (3) The uncertainty of calibration used is 2.0% (4) The uncertainty of calibration used is 2.7% Total expanded uncertainty (k=2) Without contribution of With contribution of Electric probe (6) Electric frequency range uncertainty of calibration uncertainty of (%) calibration UT(%) 10 V/m to 500 V/m 7.8 8.2 (7) Frequency at 50 Hz 10 V/m to < 100 kV/m 8.4 8.8 (8) Frequency from 40 to 10 (9) 10 V/m to < 500 V/m 9.5 9.9 kHz (6) The temperature range is from -10 degree to 23 degree and relative humidity from 20% to 50% (7) The uncertainty of calibration used is 2.0% (8) The uncertainty of calibration used is 2.5% ___________________________________________________________________________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 4 of 10

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2AN4YCTVK09 Report No.: LCS190415047AEA 7. Measurement Procedure a) The RF exposure test was performed on 360 degree turn table in anechoic chamber. b) The measurement probe was placed at test distance (15cm) which is between the edge of the charger and the geometric center of probe. c) The turn table was rotated 360d degree to search of highest strength. d) The highest emission level was recorded and compared with limit as soon as measurement of each points(A, B, C, D, E) were completed. e) The EUT were measured according to the dictates of KDB 680106D01v03. 8. Equipment Approval Considerations The EUT does comply with item 5.2 of KDB 680106 D01 v03 as follows table; Requirements of KDB 680106 D01 v03 Yes / No Description The device operate in the frequency Power transfer frequency is less than 1 MHz Yes range 110.0 KHz - 205.0 KHz Output power from each primary coil is less than 15 The maximum output power of the Yes watts primary coil is 10W. The transfer system includes only single primary and secondary coils. This includes charging systems The transfer system includes single coil that may have multiple primary coils and clients Yes that is able to detect receiver device. that are able to detect and allow coupling only between individual pairs of coils. Client device is placed directly in contact with the Client device is placed directly in Yes transmitter. contact with the transmitter. Mobile exposure conditions only (portable exposure conditions are not covered by this Yes Mobile exposure conditions only exclusion). The aggregate H-field strengths at 15 The aggregate H-field strengths at 15 cm cm surrounding the device and 20 cm surrounding the device and 20 cm above the top Yes above the top surface from all surface from all simultaneous transmitting coils are simultaneous transmitting coils areless demonstrated to be less than 50% of the MPE limit. than 50% the MPE limit. In all other cases, unless excluded above, an RF exposure evaluation report must be reviewed and accepted through a KDB or PBA inquiry to enable authorization of the equipment. When evaluation is required to show compliance; for example, using field strength, power density, SAR measurements or computational modeling etc., the specific authorization requirements will be determined based on the results of the RF exposure evaluation. ___________________________________________________________________________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 5 of 10

survenen tes compiiance resmie Laronatomy tro ree : aavavervioo tevort No esaoersouzacn 9.. Eand Hfield Strength [Test Moces: Mode 1 Car Charge (124/1.5¢) + EUT + Mobile Phone iPhone X (Battery Status: <1%) Record Mode 2 Car Charge (124/1.5¢) + EUT + Mobile Phone iPhone K (Battery Status: <50%) Pre—tested Mode 3 Car Charge (12V/1.50) + EUT + Mobile Phone iPhone X @Battery Status:100%) Pre—tested Mode 4 Car Charge (SV/2A) + EUT + Mobile Phone iPhone X (Battery Status: <1%) Pre—tested Mode 5 Car Charge (SV/28) + EUT + Mobile Phone iPhone X (Battery Status: «50%) Pre—tested Mode 6 Car Charge (SV/28) + EUT + Mobile Phone iPhone X (Battery Status:100%) Pre—tested Note: Alltest mades were pre—tested, but we only recorded the worst case in this report. HField Strength at 15 cm from the edges surrounding the EUTand 15em from the top surface of the EUT Measured F—Field Strength Values (A/m) FCCHiField FCCH—Field Charging Frequency Test Test Test Test Test Strength50 Strength Battery Range Postion Position Postion Position Position % Limits Limits Level (meig A a c o & (A/m) (A/m) 15 o.160 asee o8 asos ores oi aasis Les sor o.160 o.osa o.oss ooz o.oor oire sais Les sor o.160 o.00s o.oss ooss o.os2 ons sais Les H.Feld Strength at 20cm from the top surface of the EUT Measured H—field strength FOCH—Field FCCH—Field Charging Frequency Range Values (A/m) Strength50% Limits Strength Battery Level (meig h Test Positiont (A/m) is (A/m) 1x o.160 0.095 oans 1e3 sox o.160 o.082 ons 1e3 sox o.160 o.085 ons 1e3 WPT RF Exposure_Mobile se os ar L os —Testrsiton15on E.. oTexbostont15e $ —tetrortonC.150m ; o —Testrstiond5im —testrostont150 sz —sostime or gemmeeeccncnnnnn ——texPostont,200m o 108 sooos ssoos ChargingtattryLevel This epon thall ot be repreduced exept nful, hothe witen approvalofSherzhan LCS ComplarceTesing taborarery Lad Pageoef 10

swenziien Los compuiaNce Trstine tagoratory ITp. rco i: 2anavervios Report No.: 1CS190415087A0A 10. Test Setup Photos 10.1. Test Position E—Exposure photo from top surface(20cm) Tmi 9.2Test Position E—Exposure photo from top surface(LScm) ) TML This report shall not be reproduced except infull, wiiontthe written approval ofShenchen LCS Compliance Testing Laboratory Lid. Page 7 of 10

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2AN4YCTVKO3 Report No.: LCS190415047AEA 9.3 Test PositionA—Exposure photo from side edge surface—Rear TM1 9.4 Test PositionB—Exposure photo from side edge surface—Left TM1 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 8 of 10

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2AN4YCTVKO3 Report No.: LCS190415047AEA 9.5 Test Position C—Exposure photo from side edge surface—Front TM1 9.6 Test PositionD—Exposure photo from side edge surface—Right TM1 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 9 of 10

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2AN4YCTVK09 Report No.: LCS190415047AEA 11. Conclusion A minimum safety distance of 20 cm to the antenna is required when the device is charging a smart phone. The detected emissions with a distance of 20 cm from center of probe to the top surface of EUT and 15cm from center of probe to edge of EUT are below the limitations according to FCC KDB 680106 D01 v03 Section 3. RF Exposure Requirement Clause 3. Revision History Revision Issue Date Revisions Revised By 000 April 25, 2019 Initial Issue Gavin Liang .........................END OF REPORT......................... ___________________________________________________________________________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 10 of 10


Document Created: 2019-04-29 08:36:02
Document Modified: 2019-04-29 08:36:02
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