MPE Calculation

FCC ID: KA2WL8620APA1

RF Exposure Info

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FCCID_4148225

RF Exposure Report Report No.: SA180424C01B FCC ID: KA2WL8620APA1 Model: DWL-8620AP Received Date: Apr. 24, 2018 Test Date: May. 21 ~ Oct. 01, 2018 Issued Date: Nov. 26, 2018 Applicant: D-Link Corporation Address: 17595 Mt. Herrmann, Fountain Valley, California, United States, 92708 Issued By: Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch Lab Address: No. 47-2, 14th Ling, Chia Pau Vil., Lin Kou Dist., New Taipei City, Taiwan, R.O.C. Test Location: No. 19, Hwa Ya 2nd Rd., Wen Hwa Vil., Kwei Shan Dist., Taoyuan City 33383, TAIWAN (R.O.C.) This report is for your exclusive use. Any copying or replication of this report to or for any other person or entity, or use of our name or trademark, is permitted only with our prior written permission. This report sets forth our findings solely with respect to the test samples identified herein. The results set forth in this report are not indicative or representative of the quality or characteristics of the lot from which a test sample was taken or any similar or identical product specifically and expressly noted. Our report includes all of the tests requested by you and the results thereof based upon the information that you provided to us. You have 60 days from date of issuance of this report to notify us of any material error or omission caused by our negligence, provided, however, that such notice shall be in writing and shall specifically address the issue you wish to raise. A failure to raise such issue within the prescribed time shall constitute your unqualified acceptance of the completeness of this report, the tests conducted and the correctness of the report contents. Unless specific mention, the uncertainty of measurement has been explicitly taken into account to declare the compliance or non-compliance to the specification. The report must not be used by the client to claim product certification, approval, or endorsement by TAF or any government agencies. Report No.: SA180424C01B Page No. 1 / 6 Report Format Version: 6.1.1 Reference No.: 180910C13

Table of Contents Release Control Record .................................................................................................................................. 3 1 Certificate of Conformity...................................................................................................................... 4 2 RF Exposure .......................................................................................................................................... 5 2.1 Limits for Maximum Permissible Exposure (MPE) .............................................................................. 5 2.2 MPE Calculation Formula ................................................................................................................... 5 2.3 Classification ....................................................................................................................................... 5 3 Calculation Result of Maximum Conducted Power........................................................................... 6 Report No.: SA180424C01B Page No. 2 / 6 Report Format Version: 6.1.1 Reference No.: 180910C13

Release Control Record Issue No. Description Date Issued SA180424C01 Original release Nov. 26, 2018 Report No.: SA180424C01B Page No. 3 / 6 Report Format Version: 6.1.1 Reference No.: 180910C13

1 Certificate of Conformity Product: Unified AC Concurrent Dual-Band PoE Access Point Brand: D-Link Corporation Model: DWL-8620AP Sample Status: Engineering sample Applicant: D-Link Corporation Test Date: May. 21 ~ Oct. 01, 2018 Standards: FCC Part 2 (Section 2.1091) KDB 447498 D01 General RF Exposure Guidance v06 IEEE C95.1-1992 The above equipment has been tested by Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch, and found compliance with the requirement of the above standards. The test record, data evaluation & Equipment Under Test (EUT) configurations represented herein are true and accurate accounts of the measurements of the sample’s RF characteristics under the conditions specified in this report. Prepared by : , Date: Nov. 26, 2018 Polly Chien / Specialist Approved by : , Date: Nov. 26, 2018 Bruce Chen / Project Engineer Report No.: SA180424C01B Page No. 4 / 6 Report Format Version: 6.1.1 Reference No.: 180910C13

2 RF Exposure 2.1 Limits for Maximum Permissible Exposure (MPE) Frequency Range Electric Field Magnetic Field Power Density Average Time (MHz) Strength (V/m) Strength (A/m) (mW/cm2) (minutes) Limits For General Population / Uncontrolled Exposure 300-1500 … … F/1500 30 1500-100,000 … … 1.0 30 F = Frequency in MHz 2.2 MPE Calculation Formula Pd = (Pout*G) / (4*pi*r2) where Pd = power density in mW/cm2 Pout = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 R = distance between observation point and center of the radiator in cm 2.3 Classification The antenna of this product, under normal use condition, is at least 37cm away from the body of the user. So, this device is classified as Mobile Device. Report No.: SA180424C01B Page No. 5 / 6 Report Format Version: 6.1.1 Reference No.: 180910C13

3 Calculation Result of Maximum Conducted Power Frequency Band Max Power Antenna Gain Distance Power Density Limit (MHz) (dBm) (dBi) (cm) (mW/cm2) (mW/cm2) CDD Mode 2412-2462 29.53 9.02 37 0.416 1 5180-5240 28.41 10.02 37 0.405 1 5260-5320 22.65 10.02 37 0.107 1 5500-5700 23.59 10.02 37 0.133 1 5745-5825 29.66 10.02 37 0.540 1 Beamforming Mode 2412-2462 27.93 9.02 37 0.288 1 5180-5240 27.03 10.02 37 0.295 1 5260-5320 21.27 10.02 37 0.078 1 5500-5700 22.21 10.02 37 0.097 1 5745-5825 28.17 10.02 37 0.383 1 Note: 1. Directional gain: 2.4GHz Band: Directional gain = 3dBi + 10log(4) = 9.02dBi 5GHz Band: Directional gain = 4dBi +10log (4) = 10.02dBi 2. The above Max Power is Turn-up Power which client declaried. Conclusion: 2.4GHz & 5GHz Band 1, 2 or 2.4GHz & 5GHz Band 3 or 2.4GHz & 5GHz Band 4 can transmit at same time. The formula of calculated the MPE is: CPD1 / LPD1 + CPD2 / LPD2 + ……etc. < 1 CPD = Calculation power density LPD = Limit of power density 1. WLAN 2.4GHz + WLAN 5GHz Band 1 = 0.416 + 0.405 = 0.821 2. WLAN 2.4GHz + WLAN 5GHz Band 3 = 0.416 + 0.133 = 0.549 3. WLAN 2.4GHz + WLAN 5GHz Band 4 = 0.416 + 0.540 = 0.956 Therefore the maximum calculations of above situations are less than the “1” limit. ---END--- Report No.: SA180424C01B Page No. 6 / 6 Report Format Version: 6.1.1 Reference No.: 180910C13


Document Created: 2019-03-21 23:53:59
Document Modified: 2019-03-21 23:53:59
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