1507RSU00809-RF Exposure Report

FCC ID: H8N-WHD0110

RF Exposure Info

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FCCID_2792963

MRT Technology (Suzhou) Co., Ltd Report No.: 1507RSU00809 Phone: +86-512-66308358 Report Version: V01 Fax: +86-512-66308368 Issue Date: 10-12-2015 Web: www.mrt-cert.com RF Exposure Evaluation Declaration FCC ID: H8N-WHD0110 APPLICANT: ASKEY COMPUTER CORP Application Type: Certification Product: Smart Gateway Model No.: WHD0110(RoHS), WHD0111(RoHS) Trademark: ASKEY FCC Classification: Digital Transmission System (DTS) Unlicensed National Information Infrastructure (UNII) Reviewed By : ( Robin Wu ) Approved By : ( Marlin Chen ) The test results relate only to the samples tested. The test results shown in the test report are traceable to the national/international standards through the calibration of the equipment and evaluated measurement uncertainty herein. The test report shall not be reproduced except in full without the written approval of MRT Technology (Suzhou) Co., Ltd. FCC ID: H8N-WHD0110 Page Number: 1 of 7

Report No.: 1507RSU00809 Revision History Report No. Version Description Issue Date 1507RSU00809 Rev. 01 Initial report 10-12-2015 FCC ID: H8N-WHD0110 Page Number: 2 of 7

Report No.: 1507RSU00809 1. PRODUCT INFORMATION 1.1. Equipment Description Product Name Smart Gateway Model No. WHD0110(RoHS), WHD0111(RoHS) Brand Name ASKEY Wi-Fi Specification 802.11a/b/g/n/ac Frequency Range 2.4GHz: For 802.11b/g/n-HT20: 2412 ~ 2462 MHz For 802.11n-HT40: 2422 ~ 2452 MHz 5GHz: For 802.11a/n-HT20: 5180~5320MHz, 5500~5700MHz, 5745~5825MHz For 802.11ac-VHT20: 5180~5320MHz, 5500~5720MHz, 5745~5825MHz For 802.11n-HT40: 5190~5310MHz, 5510~5670MHz, 5755~5795MHz For 802.11ac-VHT40: 5190~5310MHz, 5510~5710MHz, 5755~5795MHz For 802.11ac-VHT80: 5210MHz, 5290MHz, 5530MHz, 5610MHz, 5690MHz, 5775MHz Type of Modulation 802.11b: DSSS 802.11g/a/n/ac: OFDM Maximum Average Output For 2.4GHz Band: Power 802.11b: 25.40dBm 802.11g: 22.28dBm 802.11n-HT20: 22.16dBm 802.11n-HT40: 22.10dBm For 5GHz Band: 802.11a: 22.33dBm 802.11n-HT20: 21.51dBm 802.11n-HT40: 23.06dBm 802.11ac-VHT20: 22.85dBm 802.11ac-VHT40: 23.34dBm 802.11ac-VHT80: 22.36dBm FCC ID: H8N-WHD0110 Page Number: 3 of 7

Report No.: 1507RSU00809 1.2. Antenna Description Antenna Frequency Tx Per Chain Max Antenna Gain (dBi) CDD Directional Type Band Paths Gain (dBi) (MHz) Ant 0 Ant 1 2412 ~2462 2 4.13 3.82 6.99 5150 ~ 5250 2 3.90 3.53 6.73 PCB 5250 ~ 5350 2 3.86 3.42 6.66 Antenna 5470 ~ 5725 2 4.10 3.65 6.89 5725 ~ 5850 2 4.00 4.35 7.19 1. The EUT supports Cyclic Delay Diversity (CDD) technology, and that CDD technology is correlated. (1) Correlated signals include, but are not limited to, signals transmitted in any of the following modes:  Unequal Antenna gains, with equal transmit powers. For Antenna gains given by G1, G2, …, GN dBi transmit signals are correlated, then  Directional gain = 10*log[(10G1/20 + 10G2/20 + … + 10GN/20)2/NANT] dBi [Note the “20”s in the denominator of each exponent and the square of the sum of terms; the object is to combine the signal levels coherently.] For example: 2.4GHz Directional Gain = 10*log[(104.13/20 + 103.82/20)2/2] = 6.99 dBi FCC ID: H8N-WHD0110 Page Number: 4 of 7

Report No.: 1507RSU00809 2. RF Exposure Evaluation 2.1. Limits According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in 1.1307(b) LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE) Frequency Range Electric Field Magnetic Field Power Density Average Time 2 (MHz) Strength (V/m) Strength (A/m) (mW/cm ) (Minutes) (A) Limits for Occupational/ Control Exposures 300-1500 -- -- f/300 6 1500-100,000 -- -- 5 6 (B) Limits for General Population/ Uncontrolled Exposures 300-1500 -- -- f/1500 6 1500-100,000 -- -- 1 30 f= Frequency in MHz 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 Pd is the limit of MPE, 1mW/cm². If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. FCC ID: H8N-WHD0110 Page Number: 5 of 7

Report No.: 1507RSU00809 2.2. Test Result of RF Exposure Evaluation Product Smart Gateway Test Item RF Exposure Evaluation Antenna Gain: The maximum Gain measured in fully anechoic chamber is 6.99dBi for 2.4GHz, 6.73dBi for 5.2GHz, 6.66dBi for 5.3GHz, 6.89dBi for 5.6GHz and 7.19dBi for 5.80GHz in logarithm scale, 1dBi for Bluetooth Module. For 2.4GHz ISM Band: Test Mode Frequency Band Maximum Average Power Density at Limit (MHz) Output Power R = 20 cm (mW/cm2) (dBm) (mW/cm2) 802.11b/g/n-HT20/ 2412 ~ 2462 25.40 0.3449 1 n-HT40 Bluetooth 2402 ~ 2480 5.56 0.0009 1 For 5GHz UNII Band: Test Mode Frequency Band Maximum Average Power Density at Limit (MHz) Output Power R = 20 cm (mW/cm2) (dBm) (mW/cm2) 5180 ~ 5240 23.34 0.2022 1 802.11a/n-HT20/ 5260 ~ 5320 22.75 0.1737 1 n-H40/ac-VHT20 5500 ~ 5720 22.51 0.1733 1 ac-VHT40/ac-VHT80 5745 ~ 5825 22.85 0.2008 1 FCC ID: H8N-WHD0110 Page Number: 6 of 7

Report No.: 1507RSU00809 CONCULISON: Both of the WLAN 2.4GHz Band and WLAN 5GHz Band can transmit simultaneously. Therefore, the Max Power Density at R (20 cm) = 0.3449mW/cm2+ 0.2022mW/cm2 + 0.0009 mW/cm2 = 0.5480mW/cm2 < 1mW/cm2. So the EUT complies with the requirement. The End FCC ID: H8N-WHD0110 Page Number: 7 of 7


Document Created: 2015-10-12 20:25:01
Document Modified: 2015-10-12 20:25:01
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