MPE report

FCC ID: EHA-IM5R3

RF Exposure Info

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FCCID_1391183

MPE Estimates, RFID frequency of operation 902.75 - 927.25 MHz IM5R3 RFID Radio Module FCC regulations compliance 47 CFR 15.247(i) Systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy levels in excess of the Commission's guidelines. See § 1.1307(b)(1) of this Chapter. 47 CFR 2.1091 (b). The system is classified as a mobile transmitter. 47 CFR 2.1091(c) The EUT is categorically excluded from routine environmental evaluation. 47 CFR 1.1310 General Public Limit mW/cm² = F(MHz) / 1500 Limit 0.601 mW/cm² 902 MHz System Description The IM5 RFID radio module is utilized within Intermec RFID fixed readers. Antennas in this estimate represent the highest gain antennas used with the IM5. The user manual instruct to provide for a separation distance of 23-cm or greater distance between the IM5 RFID system antennas and the head or torso of the user or near by persons. Radio Disc / Rule MHz - MHz Milliwatts (Conducted) IM5R3 RFID Radio FCC ID: EHA-IM5R3 IC: 1223A-IM5R3 15.247, RSS-210 902.75 927.25 943.0 Antennas) Linear Intermec PN Vendor Vendor PN Type Polorization Gain Connector Dimensions (mm) N/A Kathrein 520 10087 Panel Circular 7.5 N 557 x 262 x 59 N/A Huber Suhner 1309.17.0085 Panel Linear 8 N 190 x 190 x 30 N/A NeWave NSS-N7 Panel Linear 5.5 TNC 2200 x 229 x 38 Antenna cables All cables have a minimum of 2.4 dB loss Table 1 in 47 CFR 1.1310 defines the maximum permissible exposure (MPE) for the general population. The exposure level at the distance listed from the EUT’s transmitting antenna is calculated using the general equation: The exposure level at a 23 cm distance from the EUT’s transmitting antenna is calculated using the general equation (See OET 65, Page 19, Eq. 4): S = (PG)/4(PI)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 (23 cm = limit for this MPE estimate) PG = EIRP Solving for S, the maximum power densities 23 cm from the transmitting antennas are summarized in the following tables: Calculation of RF Exposure cm inches Calculations for Exposure 23.0 9.06 Peak Antenna - Pwr Density Pwr Density Pass - Conducted Antenna Cable Cable @ 23 cm Limit Fail Power Gain Loss System Gain Vendor Part Number (mW) (dBi) (dB) (dBi) (mW/cm²) (mW/cm²) 520 10087 943.0 7.5 2.4 5.1 0.459 0.601 Pass 1309.17.0085 943.0 8 2.4 5.6 0.515 0.601 Pass NSS-N7 943.0 5.5 2.4 3.1 0.290 0.601 Pass The worst case exposure for all antennas is below the limits defined by the FCC.


Document Created: 2010-11-11 12:12:35
Document Modified: 2010-11-11 12:12:35
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