RF Exposure Info

FCC ID: PY306100028

RF Exposure Info

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FCCID_654139

FCC ID: PY306100028 RF EXPOSURE REPORT REPORT NO.: SA950210L12 MODEL NO.: WAG302v2 ACCORDING: FCC Guidelines for Human Exposure IEEE C95.1 APPLICANT: NETGEAR, Inc. ADDRESS: 4500 Great America Parkway, Santa Clara, CA 95054, U.S. ISSUED BY: Advance Data Technology Corporation LAB ADDRESS: No. 47, 14th Ling, Chia Pau Tsuen, Lin Kou Hsiang 244, Taipei Hsien, Taiwan, R.O.C. TEST LOCATION: No. 19, Hwa Ya 2nd Rd., Wen Hwa Tsuen, Kwei Shan Hsiang, Taoyuan Hsien 333, Taiwan, R.O.C. Report No: SA950210L12 1

FCC ID: PY306100028 RF Exposure Measurement (Mobile Device) 1. Introduction In this document, we try to prove the safety of radiation harmfulness to the human body for our product. The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is followed. The Gain of the antenna used in this product is measured in a Fully Anechoic Chamber (FAC) calibrated for antenna measurement in ADT, and also the maximum total power input to the antenna is measured. Through the Friis transmission formula and the maximum gain of the antenna, we can calculate the distance, away from the product, where the limit of MPE is reached. Although the Friis transmission formula is a far field assumption, the calculated result of that is an over-prediction for near field power density. We will take that as the worst case to specify the safety range. 2. RF Exposure Limit According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in 1.1307(b) LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE) Frequency Electric Field Magnetic Field Power Density Average Time Range Strength (V/m) Strength (A/m) (mW/cm2) (minutes) (MHz) (A)Limits For Occupational / Control Exposures 300-1500 … … F/300 6 1500-100,000 … … 5 6 (B)Limits For General Population / Uncontrolled Exposure 300-1500 … … F/1500 6 1500-100,000 … … 1.0 30 F = Frequency in MHz Report No: SA950210L12 2

FCC ID: PY306100028 3. 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 If we know the maximum Gain of the antenna and the total power input to the antenna, through the calculation, we will know the MPE value at distance r. Ref. : David K. Cheng, Field and Wave Electromagnetics, Second Edition, Page 640, Eq. (11-133). 4. EUT Operating condition The software provided by Manufacturer enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. 5. Classification The antenna of this product, under normal use condition, is at least 20cm away from the body of the user. Warning statement to the user for keeping at least 20cm or more separation distance with the antenna should be included in users manual. So, this device is classified as Mobile Device. Report No: SA950210L12 3

FCC ID: PY306100028 6. Test Results 6.1 Antenna Gain The maximum Gain measured in Fully Anechoic Chamber is 4.59352dBi or 2.880(numeric) for 2.4GHz and 5.39536dBi or 3.463(numeric) for 5GHz 6.2 Output Power into Antenna & RF Exposure value at distance 20cm: Antenna 1: (-4.64dBi gain) For 802.11b DSSS Modulation Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 1 2412 50.466 0.003 1.0 6 2437 50.466 0.003 1.0 11 2462 50.350 0.003 1.0 For 802.11g OFDM Modulation_Normal Mode Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 1 2412 50.699 0.003 1.0 6 2437 50.234 0.003 1.0 11 2462 50.350 0.003 1.0 For 802.11g OFDM Modulation_Turbo Mode Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 6 2437 50.699 0.003 1.0 Report No: SA950210L12 4

FCC ID: PY306100028 Antenna 2: (-1.69dBi gain) For 802.11b DSSS Modulation Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 1 2412 50.466 0.007 1.0 6 2437 50.466 0.007 1.0 11 2462 50.350 0.007 1.0 For 802.11g OFDM Modulation_Normal Mode Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 1 2412 50.699 0.007 1.0 6 2437 50.234 0.007 1.0 11 2462 50.350 0.007 1.0 For 802.11g OFDM Modulation_Turbo Mode Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 6 2437 50.699 0.007 1.0 Antenna 3: (4.59352dBi gain) For 802.11b DSSS Modulation Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 1 2412 50.466 0.029 1.0 6 2437 50.466 0.029 1.0 11 2462 50.350 0.029 1.0 For 802.11g OFDM Modulation_Normal Mode Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 1 2412 50.699 0.029 1.0 6 2437 50.234 0.029 1.0 11 2462 50.350 0.029 1.0 For 802.11g OFDM Modulation_Turbo Mode Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 6 2437 50.699 0.029 1.0 Report No: SA950210L12 5

FCC ID: PY306100028 For 802.11a modulation_Normal Mode Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 1 5180 17.824 0.012 1.0 4 5240 18.030 0.012 1.0 5 5260 17.824 0.012 1.0 8 5320 22.387 0.015 1.0 9 5745 51.168 0.035 1.0 11 5785 50.466 0.035 1.0 13 5825 50.582 0.035 1.0 For 802.11a modulation_Turbo Mode Channel Limit of Output Power to Power Density Channel Frequency Power Density Antenna (mW) (mW/cm2) (MHz) (mW/cm2) 1 5210 28.510 0.020 1.0 2 5250 28.642 0.020 1.0 3 5290 28.314 0.020 1.0 4 5760 50.350 0.035 1.0 5 5800 50.699 0.035 1.0 CONCULSION: Both of the 2.4GHz and 5GHz bands can transmit simultaneously, the formula of calculated the MPE is: CPD1 / LPD1 + CPD2 / LPD2 + ……etc. < 1 CPD = Calculation power density LPD = Limit of power density Therefore, the calculation of this situation is 0.029 / 1 + 0.035 / 1 = 0.064, which is less than the “1” limit. Report No: SA950210L12 6


Document Created: 2006-04-28 10:52:05
Document Modified: 2006-04-28 10:52:05
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