RF Exposure

FCC ID: EHA-RC12

RF Exposure Info

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FCCID_1403924

Compliance with 47 CFR 2.1091 and 1.1310 The EUT is a combination 802.11a/b/g/n and Bluetooth radio module. The EUT will only be used with a separation distance of 20 centimeters or greater between the antenna and the body of the user or nearby persons and can therefore be considered a mobile transmitter per 47 CFR 2.1091(b). The antenna is a PIFA with a peak gain of 2.4 dBi in the 2.4 GHz band, and 4.8 dBi in the 5 GHz band. The maximum peak conducted output power is 53mW in the 2.4 GHz band, and 25 mW in the 5 GHz band. The maximum peak radiated power is 92 mW (EIRP) for FCC ID: EHA-RC12. The transmit frequencies are in the 2.4 and 5 GHz bands Since the transmit frequency is more than 1.5 GHz, and the output power is less than 3.0 W ERP, the EUT is categorically excluded from routine environmental evaluation per 47 CFR 2.1091(c). The MPE estimates are as follows: Table 1 in 47 CFR 1.1310 defines the maximum permissible exposure (MPE) for the general population as 1 mW/cm2. The exposure level at a 20 cm distance from the EUT’s transmitting antenna is calculated using the general equation: S = (PG)/4R2 Where: S = power density (mW/cm2) P = power input to the antenna (mW) G = numeric power gain relative to an isotropic radiator R = distance to the center of the radiation of the antenna (20 cm = limit for MPE estimates) PG = EIRP Solving for S, the maximum power density 20 cm from the transmitting antenna is summarized in the following table: FCC ID: EHA-RC12 General Max Peak Minimum Power Antenna Antenna Part Transmit Population Antenna Type Conducted Antenna Gain Antenna Density @ 20 Manufacturer No. Frequency Exposure Limit Output Power Cable Loss cm from 1.1310 (MHz) (mW) (dBi) (dB) (mW/cm2) (mW/cm2) PIFA Laird Laird WLAN 2400 53.2 2.4 0 0.01839254 1 PIFA Laird Laird WLAN 5200 25.1 4.8 0 0.01508009 1 The power density does not exceed 0.018 mW/cm2 at 20 cm; therefore, the exposure condition is compliant with FCC rules.


Document Created: 2010-12-29 08:47:03
Document Modified: 2010-12-29 08:47:03
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