RF Exposure

FCC ID: MSQ-RTN15U

RF Exposure Info

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FCCID_1570121

Report No. 118108R-RF-US-Exp RF Exposure Evaluation declaration Product Name ： Gigabit Wireless-N Router Model No. ： RT-N15U FCC ID. ： MSQ-RTN15U Applicant : ASUSTeK COMPUTER INC. Address : No. 15, Li-Te Rd., Peitou, Taipei 112, Taiwan R.O.C. Date of Receipt : 2011/08/01 Date of Declaration : 2011/08/26 Report No. : 118108R-RF-US-Exp Report Version : V1.0 The declaration results relate only to the samples calculated. The declaration shall not be reproduced except in full without the written approval of QuieTek Corporation. Page: 1 of 4

Report No. 118108R-RF-US-Exp 1. RF Exposure Evaluation 1.1. 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 Friis Formula Friis transmission 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 id the limit of MPE, 1 mW/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. 1.2. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. The temperature and related humidity: 18℃and 78％ RH. Page: 2 of 4

Report No. 118108R-RF-US-Exp 1.3. Test Result of RF Exposure Evaluation Product Gigabit Wireless-N Router Test Mode Mode 1: Transmit Test Condition RF Exposure Evaluation Antenna Gain Antenna Gain: The maximum Gain measured in fully anechoic chamber is 2.89dBi or 1.95 in linear scale. Output Power into Antenna & RF Exposure Evaluation Distance: IEEE 802.11b WLAN Function Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 1 2412 199.9862 0.07758 6 2437 148.2518 0.05751 11 2462 140.2814 0.05442 IEEE 802.11g WLAN Function Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 1 2412 257.6321 0.09995 6 2437 373.2502 0.14480 11 2462 316.9567 0.12296 The power density Pd (4th column) at a distance of 20 cm calculated from the Friis transmission formula is far below the limit of 1 mW/cm2. Page: 3 of 4

Report No. 118108R-RF-US-Exp Product Gigabit Wireless-N Router Test Mode Mode 1: Transmit Test Condition RF Exposure Evaluation Antenna Gain Antenna Gain: The maximum Gain measured in fully anechoic chamber are 2.89dBi or 1.95 in linear scale (Antenna 0); 2.51 dBi or 1.78 in linear scale (Antenna 1), the maximum Gain is 5.71 dBi or 3.73 in linear scale. Output Power into Antenna & RF Exposure Evaluation Distance: IEEE 802.11n (20MHz) WLAN Function Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 1 2412 605.3409 0.44920 6 2437 668.3439 0.49595 11 2462 729.4575 0.54130 IEEE 802.11n (40M) WLAN Function Channel Frequency Output Power to Antenna Power Density at R = 20 cm Channel (MHz) (mW) (mW/cm2) 3 2422 258.8213 0.19206 6 2437 642.6877 0.47691 9 2452 384.5918 0.28539 The power density Pd (4th column) at a distance of 20 cm calculated from the Friis transmission formula is far below the limit of 1 mW/cm2. Page: 4 of 4


Document Created: 2011-09-09 13:40:19
Document Modified: 2011-09-09 13:40:19
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