RF Exposure Analysis

FCC ID: BCGA2116

RF Exposure Info

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FCCID_4204256

RF EXPOSURE EVALUATION REPORT For: Apple Inc. Product: A2116 FCC ID: BCGA2116 RF Exposure Evaluation Report Serial No.: UL/REGA1/MPE12505086B This RF Exposure Evaluation Report Is Issued Under The Authority Of Alan Binks, Head of Inspection: PP: Written By: John Bellairs Checked By: Andrew Hoare Report Copy No: PDF01 Issue Date: 20 February 2019 This report may be reproduced in full. Partial reproduction may only be made with the written consent of UL

UL RF EXPOSURE EVALUATION REPORT No: UL/REGA1/MPE12505086B Page: 2 of 8 Issue Date: 20 February 2019 For: Apple Inc. Product: A2116 This page has been left intentionally blank.

UL RF EXPOSURE EVALUATION REPORT No: UL/REGA1/MPE12505086B Page: 3 of 8 Issue Date: 20 February 2019 For: Apple Inc. Product: A2116 RF Exposure Evaluation for the A2116 The A2116 is a desktop computer which contains 2.4GHz and 5GHz WIFI and 2.4GHz Bluetooth BR/ EDR and LE transmitters. WLAN supports 3x3 MIMO operation with beam forming, and there can be simultaneous transmission between all of the transmitters. The following FCC Rule Parts and procedures are applicable: Part 1.1310 – Radiofrequency radiation exposure limits Part 2.1091 – Radiofrequency radiation exposure evaluation: mobile devices KDB447498 D01 v06 - Mobile and Portable Devices RF Exposure Procedures and Equipment Authorisation Policies KDB 662911 D01 v02 r01 – Multiple Transmitter Output MAXIMUM TRANSMITTER POWER CONSIDERATIONS From Tune Up tables (conducted power): WLAN 2.4GHz: Power (SISO) = 23.0dBm max For non-beam forming MIMO, conducted power for each antenna: Power (2x2MIMO) = 23.0dBm max (200mW) Power (3x3 MIMO) = 22.0dBm max (158.5mW) For BF MIMO: Power (2x2MIMO) = 21.25dBm max (133.4mW) Power (3x3MIMO) = 20.0dBm max (100.0mW) ANTENNA GAINS: Antenna Gain WF2: +4.32dBi (x2.7) Antenna Gain WF3: +4.77dBi (x3.0) Antenna Gain WF4: +3.72dBi (x2.36) From KDB 662911 D01 v02 r01., Max. beamforming max antenna gain is calculated as: For 2x2MIMO = +7.6dBi (x5.75) For 3x3MIMO = +9.0dBi (x7.94)

UL RF EXPOSURE EVALUATION REPORT No: UL/REGA1/MPE12505086B Page: 4 of 8 Issue Date: 20 February 2019 For: Apple Inc. Product: A2116 RADIATED POWER: EIRPSISO2 = 27.32dBm = 539.5 mW EIRPSISO3 = 27.77dBm = 598.4 mW* EIRPSISO4 = 26.72dBm = 469.9 mW Power for non BF 2x2 MIMO operation using WF2 + WF3 antennas: EIRPMIMO2 = 27.57dBm + 27.77dBm = 539.5mW + 598.4mW = 1.14W Power for BF 2x2 MIMO operation: EIRPBF2 = 28.85dBm = 767.4mW Power for non BF 3x3 MIMO operation: EIRPMIMO3 = 26.32dBm + 26.77dBm + 25.72dBm = 428.5mW + 475.3mW + 373.3.5mW = 1.28W* Power for BF 3x3 MIMO operation: EIRPBF3 = 29dBm = 794mW *max power to be considered in calculations WLAN 5GHz: Power = 22.0dBm max (For SISO + 2x2 MIMO + 3x3MIMO + BF) ANTENNA GAINS: Antenna Gain WF2: +4.86dBi Antenna Gain WF3: +3.21dBi Antenna Gain WF4: +3.09dBi From KDB 662911 D01 v02 r01., Max. beamforming max antenna gain is calculated as: For 2x2MIMO = +7.6dBi (x5.75) For 3x3MIMO = +9.0dBi (x7.94) RADIATED POWER: EIRPSISO2 = 26.86dBm = 485.3 mW* EIRPSISO3 = 25.21dBm = 331.9 mW EIRPSISO4 = 25.09dBm = 322.8 mW Power for non BF 2x2 MIMO operation using WF2 + WF3 antennas: EIRPMIMO2 = 26.86dBm + 25.21dBm = 485.2mW + 331.9mW = 817.1mW

UL RF EXPOSURE EVALUATION REPORT No: UL/REGA1/MPE12505086B Page: 5 of 8 Issue Date: 20 February 2019 For: Apple Inc. Product: A2116 Power for BF operation: EIRPBF2 = 29.6dBm = 912mW Power for non BF 3x3 MIMO operation: EIRPMIMO3 = 26.86dBm + 25.21dBm + 25.09dBm = 485.2mW + 331.9mW + 322.8mW= 1.14W Power for BF operation: EIRPBF3 = 31.0dBm = 1.26W* *max power to be considered in calculations Bluetooth (Basic Rate, EDR & Low Energy) 2.4GHz Power conducted = 13.0dBm Antenna Gain: 3.29dBi EIRP = 16.29dBm = 42.56mW MPE CALCULATIONS The MPE calculation used to calculate the safe operating distance for the user is. S = EIRP/4 π R2 Where S = Power density EIRP = Effective Isotropic Radiated Power (EIRP = P x G) P = Conducted Transmitter Power G = Antenna Gain (relative to an isotropic radiator) R = distance to the centre of radiation of the antenna (20cm requirement). For WLAN 2.4GHz Values: Transmitter frequency range = 2412 MHz to 2472MHz Max. EIRPSISO = 598.4 mW EIRPMIMO = 1.28W R = 20cm

UL RF EXPOSURE EVALUATION REPORT No: UL/REGA1/MPE12505086B Page: 6 of 8 Issue Date: 20 February 2019 For: Apple Inc. Product: A2116 Power Density Requirement From table 1 (b) - Limits for General Population/ Uncontrolled Exposure of FCC Rule Part 1.1310 for 2.4GHz Sreq1 = 1.0 mW/cm2 Calculation: S = EIRPSISO /4 π R2 S = 598.4/(12.56 x 202) S = 598.4/ (5024) S1 SISO = 0.12mW/ cm2 (<1.0 mW/cm2) Similarly for MIMO: S1 MIMO = 0.25mW/ cm2 (<1.0 mW/cm2) This equates to minimum safe operating distance ( 3x3 MIMO operation) of 10.1 cm at the RF exposure limit of 1.0 mW/cm2 For WLAN 5GHz Values: Transmitter frequency range = 5150 MHz to 5850MHz Max. EIRPSISO = 485.3 mW EIRPBF = 1.26W R = 20cm Power Density Requirement From table 1 (b) - Limits for General Population/ Uncontrolled Exposure of FCC Rule Part 1.1310 for 5GHz Sreq2 = 1.0 mW/cm2 Calculation: S = EIRPSISO /4 π R2 S = 485.3/(12.56 x 202) S = 485.3/(5024) S2 SISO = 0.096mW/ cm2 (<1.0 mW/cm2) Similarly for BF: S2 BF = 0.25mW/ cm2 (<1.0 mW/cm2)

UL RF EXPOSURE EVALUATION REPORT No: UL/REGA1/MPE12505086B Page: 7 of 8 Issue Date: 20 February 2019 For: Apple Inc. Product: A2116 This equates to minimum safe operating distance (3x3 BF operation) of 10.0 cm at the RF exposure limit of 1.0 mW/cm2 For Bluetooth 2.4 GHz Values: Transmitter frequency range = 2402 MHz to 2480MHz EIRP = 42.56 mW R = 20cm Power Density Requirement From table 1 (b) - Limits for General Population/ Uncontrolled Exposure of FCC Rule Part 1.1310 for 5GHz Sreq3 = 1.0 mW/cm2 Calculation: S = EIRP/4 π R2 S = 42.56/(12.56 x 202) S = 42.56/(5024) S3 = 0.0085mW/ cm2 (<1.0 mW/cm2) This equates to a minimum safe operating distance of 1.84cm at the RF exposure limit of 1.0 mW/cm2 KDB447498 D01 v05 Section 7.2 SIMULTANEOUS TRANSMISSION CONSIDERATIONS Worst case summation of calculated MPE ratios for 2.4GHz/ 5GHz WLAN and 2.4GHz BT simultaneously transmitting transmitters from each respective antenna is: ie: ΣMPEratios = (S1 SISO/ Sreq1) + (S2 SISO/ Sreq2) + (S3 SISO/ Sreq3) = (0.12/1.0) + (0.096/1.0) + (0.0085/1.0) = 0.22 Σ of MPE ratios<1.0, so in accordance with KDB447498 Section 7.2, simultaneous transmission test exclusion applies for the WLAN and Bluetooth transmitters.

UL RF EXPOSURE EVALUATION REPORT No: UL/REGA1/MPE12505086B Page: 8 of 8 Issue Date: 20 February 2019 For: Apple Inc. Product: A2116 Conclusion The required 20cm RF exposure limits for General Population/ Uncontrolled Exposure will not be exceeded for the A2116 using antennas as specified.


Document Created: 2019-02-20 14:20:40
Document Modified: 2019-02-20 14:20:40
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