MPE Origianl Report

FCC ID: KA2BA2720PA1

RF Exposure Info

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FCCID_4376852

                                                           RF Exposure Report

                       Report No.: SA170801C10

                             FCC ID: KA2WL7620APA1

                              Model: DWL-7620AP

                 Received Date: Aug. 01, 2017

                         Test Date: Aug. 07 ~ Aug. 30, 2017

                     Issued Date: Sep. 12, 2017


                         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
unless 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.: SA170801C10                                              Page No. 1 / 6                                             Report Format Version: 6.1.1


                                                                   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.: SA170801C10                                              Page No. 2 / 6                                              Report Format Version: 6.1.1


                                         Release Control Record


Issue No.             Description                                        Date Issued
SA170801C10           Original release                                   Sep. 12, 2017




Report No.: SA170801C10                     Page No. 3 / 6        Report Format Version: 6.1.1


1    Certificate of Conformity


            Product: Unified AC Tri-band PoE Access Point

              Brand: D-Link Corporation

              Model: DWL-7620AP

    Sample Status: Identical Prototype

          Applicant: D-Link Corporation

          Test Date: Aug. 07 ~ Aug. 30, 2017

         Standards: FCC Part 2 (Section 2.1091)
                          KDB 447498 D03 (January 17, 2014)
                          IEEE C95.1



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:         Sep. 12, 2017
                             Pettie Chen / Senior Specialist




     Approved by :                                               , Date:         Sep. 12, 2017
                               Ken Liu / Senior Manager




Report No.: SA170801C10                         Page No. 4 / 6                        Report Format Version: 6.1.1


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 25cm away from the body of the user. So,
this device is classified as Mobile Device.




Report No.: SA170801C10                        Page No. 5 / 6                        Report Format Version: 6.1.1


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               27.20          6.26                  25            0.282                   1

    5180-5240               28.86          7.31                  25            0.527                   1

    5745-5825               29.81          7.31                  25            0.656                   1

                                             Beamforming Mode

    2412-2462               23.88          6.26                  25            0.131                   1

    5180-5240               24.58          7.31                  25            0.197                   1

    5745-5825               26.35          7.31                  25            0.296                   1

Note:
2.4GHz Band: Directional gain = 3.25dBi + 10log(2) = 6.26dBi
5GHz Band: Directional gain = 4.3dBi +10log (2) = 7.31dBi



Conclusion:
2.4GHz & 5GHz Band 1 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 = 0.282 + 0.527 = 0.809
2. WLAN 2.4GHz + WLAN 5GHz Band 4 = 0.282 + 0.656 = 0.938


Therefore the maximum calculations of above situations are less than the “1” limit.


---END---




Report No.: SA170801C10                       Page No. 6 / 6                           Report Format Version: 6.1.1



Document Created: 2018-04-03 15:17:47
Document Modified: 2018-04-03 15:17:47

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