RF Exposure Info

FCC ID: KA2DI634MB1

RF Exposure Info

Download: PDF
FCCID_585323

FCC ID.: KA2DI634MB1 RF EXPOSURE REPORT REPORT NO.: SA940818L04 MODEL NO.: AV10 ACCORDING: FCC Guidelines for Human Exposure IEEE C95.1 APPLICANT: D-Link Corporation ADDRESS: 17595 Mt. Herrmann, Fountain Valley, California, U.S.A. ISSUED BY: Advance Data Technology Corporation LAB LOCATION: 47 14th Lin, Chiapau Tsun, Linko, Taipei, 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: SA940818L04 1

FCC ID.: KA2DI634MB1 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: SA940818L04 2

FCC ID.: KA2DI634MB1 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 This modular is specified to be installed in access point or router which is connected with host through wire. So it is easy to be re-located in the place where at least 20cm far 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: SA940818L04 3

FCC ID.: KA2DI634MB1 6 Test Results 6.1 Antenna Gain The maximum Gain measured in Fully Anechoic Chamber is 2.3197dBi or 1.706 (numeric) 6.2 Output Power into Antenna & RF Exposure value at distance 20cm: (FOR SINGLE CHAIN (TX)) 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 57.280 0.019 1.0 6 2437 57.148 0.019 1.0 11 2462 56.885 0.019 1.0 802.11g 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 51.404 0.017 1.0 6 2437 51.168 0.017 1.0 11 2462 51.050 0.017 1.0 802.11g 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 50.466 0.017 1.0 Report No: SA940818L04 4

FCC ID.: KA2DI634MB1 (FOR DUAL CHAIN (TX)) 802.11g OFDM modulation_Normal mode PEAK POWER PEAK POWER TOTAL TOTAL LIMIT OF CHANNEL PEAK PEAK POWER OUTPUT (mW) OUTPUT (dBm) POWER CHANNEL FREQUENCY POWER POWER DENSITY DENSITY (MHz) CHAIN 0 CHAIN 1 CHAIN 0 CHAIN 1 (mW/CM2)) (mW) (dBm) (mW/CM2) 1 16.10 20.749 19.999 13.17 13.01 40.748 16.10 0.014 1.0 6 16.10 20.654 20.045 13.15 13.02 40.699 16.10 0.014 1.0 11 16.13 20.797 20.184 13.18 13.05 40.981 16.13 0.014 1.0 802.11g OFDM modulation_Turbo mode PEAK POWER PEAK POWER TOTAL TOTAL LIMIT OF CHANNEL PEAK PEAK POWER OUTPUT (mW) OUTPUT (dBm) POWER CHANNEL FREQUENCY POWER POWER DENSITY DENSITY (MHz) CHAIN 0 CHAIN 1 CHAIN 0 CHAIN 1 (mW/CM2)) (mW) (dBm) (mW/CM2) 6 2437 20.464 20.230 13.11 13.06 40.695 16.10 0.014 1.0 Report No: SA940818L04 5


Document Created: 2005-08-29 10:23:11
Document Modified: 2005-08-29 10:23:11
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC