MPE

FCC ID: C3K-WKS168

RF Exposure Info

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FCCID_579559

REPORT NO: 05U3581-2 DATE: JULY 15, 2005 EUT: Wireless Networking Adapter FCC ID:C3K-WKS168 7.1.3. MAXIMUM PERMISSIBLE EXPOSURE LIMITS §1.1310 The criteria listed in Table 1 shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in §1.1307(b), except in the case of portable devices which shall be evaluated according to the provisions of §2.1093 of this chapter. Page 20 of 61 COMPLIANCE CERTIFICATION SERVICES DOCUMENT NO: CCSUP4031A.2 561F MONTEREY ROAD, MORGAN HILL, CA 95037 USA TEL: (408) 463-0885 FAX: (408) 463-0888 This report shall not be reproduced except in full, without the written approval of CCS.

REPORT NO: 05U3581-2 DATE: JULY 15, 2005 EUT: Wireless Networking Adapter FCC ID:C3K-WKS168 CALCULATIONS Given E = √ (30 * P * G) / d and S = E ^ 2 / 3770 where E = Field Strength in Volts/meter P = Power in Watts G = Numeric antenna gain d = Distance in meters S = Power Density in milliwatts/square centimeter Combining equations and rearranging the terms to express the distance as a function of the remaining variables yields: d = √ ((30 * P * G) / (3770 * S)) Changing to units of Power to mW and Distance to cm, using: P (mW) = P (W) / 1000 and d (cm) =100 * d (m) yields d = 100 * √ ((30 * (P / 1000) * G) / (3770 * S)) d = 0.282 * √ (P * G / S) where d = distance in cm P = Power in mW G = Numeric antenna gain S = Power Density in mW/cm^2 Substituting the logarithmic form of power and gain using: P (mW) = 10 ^ (P (dBm) / 10) and G (numeric) = 10 ^ (G (dBi) / 10) yields d = 0.282 * 10 ^ ((P + G) / 20) / √ S where d = MPE distance in cm P = Power in dBm G = Antenna Gain in dBi S = Power Density Limit in mW/cm^2 Rearranging terms to calculate the power density at a specific distance yields S = .0795 * 10 ^ ((P + G) / 10) / (d^2) Equation (1) Page 21 of 61 COMPLIANCE CERTIFICATION SERVICES DOCUMENT NO: CCSUP4031A.2 561F MONTEREY ROAD, MORGAN HILL, CA 95037 USA TEL: (408) 463-0885 FAX: (408) 463-0888 This report shall not be reproduced except in full, without the written approval of CCS.

REPORT NO: 05U3581-2 DATE: JULY 15, 2005 EUT: Wireless Networking Adapter FCC ID:C3K-WKS168 LIMITS From §1.1310 Table 1 (B), the maximum S = 1.0 mW/cm^2 RESULTS No non-compliance noted: Mode MPE Output Antenna Power Distance Power Gain Density (cm) (dBm) (dBi) (mW/cm^2) 802.11a 20.0 17.06 2.60 0.02 NOTE: For mobile or fixed location transmitters, the minimum separation distance is 20 cm, even if calculations indicate that the MPE distance would be less. Page 22 of 61 COMPLIANCE CERTIFICATION SERVICES DOCUMENT NO: CCSUP4031A.2 561F MONTEREY ROAD, MORGAN HILL, CA 95037 USA TEL: (408) 463-0885 FAX: (408) 463-0888 This report shall not be reproduced except in full, without the written approval of CCS.


Document Created: 2005-07-21 15:55:03
Document Modified: 2005-07-21 15:55:03
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