RF assessment 75943122-04 Issue 01

FCC ID: 2AQQW9200

RF Exposure Info

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FCCID_4089136

Report on the Exposure Calculation for PervasID UHF RFID Distributed Antenna System, Model: Space/Portal Ranger 9200 In accordance with FCC and ISED Regional Requirements Prepared for: PervasID St John's Innovation Centre Cowley Road Cambridge CB4 0WS United Kingdom COMMERCIAL-IN-CONFIDENCE Document Number: 75943122-04 | Issue: 01 RESPONSIBLE FOR NAME DATE SIGNATURE Project Management Natalie Bennett 30 October 2018 Authorised Signatory Simon Bennett 30 October 2018 Signatures in this approval box have checked this document in line with the requirements of TÜV SÜD Product Service document control rules. ENGINEERING STATEMENT The calculations shown in this report were made in accordance with the procedures described in FCC and ISED Canada Regional Requirements. RESPONSIBLE FOR NAME DATE SIGNATURE Calculation Peter Dorey 30 October 2018 EXECUTIVE SUMMARY The calculation of exposure for this product was found to be compliant at 23 cm (FCC) and 34 cm (ISED Canada) for general public exposure. DISCLAIMER AND COPYRIGHT This non-binding report has been prepared by TÜV SÜD Product Service with all reasonable skill and care. The document is confidential to the potential Client and TÜV SÜD Product Service. No part of this document may be reproduced without the prior written approval of TÜV SÜD Product Service. © 2018 TÜV SÜD Product Service. TÜV SÜD Product Service TUV SUD Ltd is a Phone: +44 (0) 1489 558100 TÜV SÜD Product Service is a trading name of TUV SUD Ltd TÜV SÜD Group Company Fax: +44 (0) 1489 558101 Octagon House Registered in Scotland at East Kilbride, www.tuv-sud.co.uk Concorde Way Glasgow G75 0QF, United Kingdom Fareham Registered number: SC215164 Hampshire PO15 5RL United Kingdom TÜV SÜD Product Service

Document Number: 75943122-04 | Issue: 01 COMMERCIAL-IN-CONFIDENCE Contents 1 Report Summary .........................................................................................................................2 1.1 Report Modification Record...........................................................................................................2 1.2 Introduction....................................................................................................................................2 1.3 Brief Summary of Results .............................................................................................................3 1.4 Product Information .......................................................................................................................3 2 Assessment Details ....................................................................................................................5 2.1 Assessment Method ......................................................................................................................5 2.2 Individual Antenna Port Exposure Results ....................................................................................5 2.3 Combined Antenna Port RF Exposure Results.............................................................................6 2.4 Far Field Region Boundary Results ..............................................................................................6 2.5 Uncertainty ....................................................................................................................................6 Annex A Regional Requirements .................................................................................................................7 COMMERCIAL-IN-CONFIDENCE Page 1 of 8

Document Number: 75943122-04 | Issue: 01 COMMERCIAL-IN-CONFIDENCE 1 Report Summary 1.1 Report Modification Record Alterations and additions to this report will be issued to the holders of each copy in the form of a complete document. Issue Description of Change Date of Issue 1 First Issue 30 October 2018 1.2 Introduction Objective To perform electromagnetic field exposure assessment to determine the equipment under test's (EUT’s) compliance with the applied specifications. Applicant PervasID Manufacturer PervasID Model Number(s) Space/Portal Ranger 9200 Hardware Version(s) v5.2 FCC Software Version(s) N/A Specification/Issue/Date  FCC: CFR 47 Pt1.1310:2016  ISED Canada: Health Canada Safety Code 6:2015 Order Number PO0028 Date 15 June 2018 Related Document(s)  OET65:97 Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields  IEEE C95.3:2002 IEEE Recommended Practice for Measurements and Computations of Radio Frequency Electromagnetic Fields With Respect to Human Exposure to Such Fields, 100 kHz–300 GHz  RSS-102 Issue 5 Radio Frequency (RF) Exposure Compliance of Radiocommunication Apparatus (All Frequency Bands) COMMERCIAL-IN-CONFIDENCE Page 2 of 8

Document Number: 75943122-04 | Issue: 01 COMMERCIAL-IN-CONFIDENCE 1.3 Brief Summary of Results The wireless device described within this report was compliant with the restrictions related to human exposure to electromagnetic fields for both general public and worker/occupational exposures at the compliance distances calculated. The calculations shown in this report were made in accordance with the procedures specified in the applied test specification(s). 1.3.1 Compliance Boundary Regional Calculated Compliance Boundary (m) Requirement Configuration Worker/Occupational General Public Exposure due to single FCC 0.103 0.230 antenna Exposure due to single CANADA 0.128 0.340 antenna Table 1 – Compliance Boundary Calculation Results 1.4 Product Information 1.4.1 Technical Description UHF RFID Distributed Antenna System - intended use detection and monitoring of UHF RFID tags. Figure 1 - Space/Portal Ranger 9200 1.4.2 Transmitter Description The following radio access technologies and frequency bands are supported by the equipment under test. Radio Access Antenna Port Frequency Band Minimum Frequency Output Power EIRP Duty Cycle Technology MHz MHz dBm % RFID RF1 to RF8 Note 1 902-928 902 36 Note 2 100 Table 2 – Transmitter Description Note 1: Antenna ports RF1 to RF8 identical COMMERCIAL-IN-CONFIDENCE Page 3 of 8

Document Number: 75943122-04 | Issue: 01 COMMERCIAL-IN-CONFIDENCE Note 2: Dependent on the antenna gain, the transmitter output power level is set to maintain an output power EIRP of 36 dBm. With the Laird S9028PCR antenna listed in section 1.4.3 with gain 9 dBi, the transmitter output power level would be 27 dBm. 1.4.3 Antenna Description The following antennas are supported by the equipment under test. Gain Antenna length Radio Access Technology Antenna Model dBi cm RFID Laird S9028PCR 9 dBic 30.5 RFID MT-243012 11.5 dBiL 30.5 RFID Pervasid Tile 7 dBic 30.5 Table 3 – Antenna description 1.4.4 Equipment Configuration The PervasID Space Ranger system is an 8-port UHF RFID reader capable of feeding eight beams using 4-element array ceiling tile antennas. Multiple non-overlapping beams transmit simultaneously and therefore as the beams are non-overlapping only the exposure contribution from a single antenna needs to be considered. The transmitter power is set to achieve a target output power EIRP of 36 dBm. COMMERCIAL-IN-CONFIDENCE Page 4 of 8

Document Number: 75943122-04 | Issue: 01 COMMERCIAL-IN-CONFIDENCE 2 Assessment Details 2.1 Assessment Method FCC CFR 47 Pt1.1310 refers to OET Bulletin 65 that states methods in its Section 2. ISED Canada RSS-102 clause 3 specifies: RF exposure evaluation shall be made in accordance with the latest version of IEEE C95.3. IEEE C95.3 Annex B specifies the calculation method and describes the quantities in clause 1.4. The methods are summarised as follows: The assessment method is by calculation of the power density S, electric field strength E, magnetic field strength H or magnetic flux density B. The calculation uses the spherical model applicable under far field conditions. ࡱ૛ ࡼ ൈ ࡳ࢏ ࡿൌࡱൈࡴൌ ൌ ࡴ૛ ൈ ࣁ ൌ ࣁ ૝ ൈ ࣊ ൈ ࢘૛ Where: η - Impedance of free space (377 ohm in far field) P – Transmitter power W Gi – Antenna gain ratio relative to isotropic R – Separation distance m The magnetic flux density is related to the magnetic field strength by a constant: ࡮ ൌ ࣆ࢕ ൈ ࡴ Where: µo – Permeability of free space 4xπ E-7 H/m The far field region boundary depends on the frequency and wavelength and also on the antenna dimension. The boundary of the far field region is calculated below to demonstrate the validity of using the spherical model. 2.2 Individual Antenna Port Exposure Results 2.2.1 Calculation of Compliance Distance The frequencies shown in the tables below have been chosen based on the lowest possible frequency that the EUT can transmit. A full list of the regional requirements is shown in Annex A. Calculated Compliance Boundary (m) at Limit for: Regional Antenna Frequency RAT S Power Requirement Port (MHz) E Field H Field B Field Density RF1 - FCC RFID 902 0.103 N/A N/A N/A RF8 RF1 - CANADA RFID 902 0.128 0.128 0.128 N/A RF8 Table 4 – Calculation of Compliance Distance Worker/Occupational COMMERCIAL-IN-CONFIDENCE Page 5 of 8

Document Number: 75943122-04 | Issue: 01 COMMERCIAL-IN-CONFIDENCE Calculated Compliance Boundary (m) at Limit for: Regional Antenna Frequency RAT S Power Requirement Port (MHz) E Field H Field B Field Density RF1 - FCC RFID 902 0.230 N/A N/A N/A RF8 RF1 - CANADA RFID 902 0.340 0.340 0.340 N/A RF8 Table 5 – Calculation of Compliance Distance General Public The following tables show the regional requirements for the frequencies used in the RF exposure calculation. A full list of the requirements is shown in Annex A. Worker/Occupational Limit General Public Limit Regional Frequency S Power S Power Requirement (MHz) E Field H Field B Field E Field H Field B Field Density Density (V/m) (A/m) (µT) (V/m) (A/m) (µT) (W/m2) (W/m2) FCC 902 30.07 N/A N/A N/A 6.01 N/A N/A N/A CANADA 902 19.39 85.49 0.2268 N/A 2.74 32.14 0.0828 N/A Table 6 – Limits 2.3 Combined Antenna Port RF Exposure Results Exposure is assessed from a single antenna as the beams are non-overlapping. Combined exposure does not require assessment. 2.4 Far Field Region Boundary Results IEEE C95.3 Annex B.2 specifies the far field region boundary calculation: Near Field / Far Field Boundary Antennas - on axis Far Field Region (Ref: IEEE C95.3 Annex B.2) 2D2/λ (m) 0.5594 Table 7 – Far Field Boundary The far field boundary is 0.5594 m. The calculated compliance boundaries are within this distance (within the near field) therefore the approach described in section 2.1 is an over estimate of the exposure and therefore a conservative assessment. 2.5 Uncertainty The basic computation formulas presented in section 2.1 are conservative formulas for the estimation of RF field strength or power density. No uncertainty estimations are required when using these formulas but there is clear guidance on where and when these formulas are applicable. For the estimate of S, E or H to be conservative, the transmitter power P and antenna gain Gi values shall be the upper bounds of uncertainty therefore maximum values are used. The spherical formula is valid under far field conditions which are established in section 2.4. COMMERCIAL-IN-CONFIDENCE Page 6 of 8

Document Number: 75943122-04 | Issue: 01 COMMERCIAL-IN-CONFIDENCE ANNEX A REGIONAL REQUIREMENTS COMMERCIAL-IN-CONFIDENCE Page 7 of 8

Document Number: 75943122-04 | Issue: 01 COMMERCIAL-IN-CONFIDENCE Electric Field Strength Magnetic Field Strength Frequency Range (MHz) Power Density (mW/cm2) (V/m) (A/m) 0 - 0.3 - - - 0.3 - 3 100 614 1.63 3 - 30 900/f^2 1842/f 4.89/f 30 - 300 1 61.4 0.163 300 - 1500 f/300 - - 1500 - 100000 5 - - Table A.1 – CFR 47 Pt1.1310 (2016) Worker/Occupational Limits Electric Field Strength Magnetic Field Strength Frequency Range (MHz) Power Density (mW/cm2) (V/m) (A/m) 0 - 0.3 - - - 0.3 - 3 100 614 1.63 3 - 30 180/f^2 824/f 2.19/f 30 - 300 0.2 27.5 0.073 300 - 1500 f/1500 - - 1500 - 100000 1 - - Table A.2 – CFR 47 Pt1.1310 (2016) General Public Limits Electric Field Strength Magnetic Field Strength Frequency Range (MHz) Power Density (W/m2) (V/m) (A/m) 10 - 20 10 61.4 0.163 20 - 48 44.72/f^0.5 129.8/f^0.25 0.3444/f^0.25 48 - 100 6.455 49.33 0.1309 100 - 6000 0.6455*f^0.5 15.60*f^0.25 0.04138*f^0.25 6000 - 150000 50 137 0.364 Table A.3 – Health Canada Safety Code 6 Worker/Occupational Limits Electric Field Strength Magnetic Field Strength Frequency Range (MHz) Power Density (W/m2) (V/m) (A/m) 10 - 20 2 27.46 0.0728 20 - 48 8.944/f^0.5 58.07/f^0.25 0.1540/f^0.25 48 - 300 1.291 22.06 0.05852 300 - 6000 0.02619*f^0.6834 3.142*f^0.3417 0.008335*f^0.3417 6000 - 15000 10 61.4 0.163 Table A.4 – Health Canada Safety Code 6 General Public Limits COMMERCIAL-IN-CONFIDENCE Page 8 of 8


Document Created: 2019-03-26 11:04:53
Document Modified: 2019-03-26 11:04:53
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