RF expousre infor

FCC ID: XPY2AGQN4NNN

RF Exposure Info

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FCCID_3432237

June 02, 2017 TUV SUD BABT Octagon House, Concorde Way Segensworth Rd N, Fareham PO15 5RL Attention: Director of Certification FCC ID: XPY2AGQN4NNN IC: 8595A-2AGQN4NNN RE: Antenna gain calculation per guidance from KDB 447498 D01 Mobile Portable RF Exposure v06 and RSS-102 Issue 5 March 2015. EUT u-blox San Diego, Inc. SARA-R410M LTE Cat-M1 Module Input Power of the Antenna 25.0 dBm / 0.316 mW (LTE Band 2, 4, 5 and 12) Frequency 699.7 MHz (LTE B12) to 1909.3 MHz (LTE B2) 4.66467 W/m2 @ 699.7 MHz FCC Limit (§1.1310 (d)(4)) 10 W/m2 @ 1909.3 MHz 2.30329 W/m2 @ 699.7 MHz RSS-102 RF Limits (Table 4) 4.24313 W/m2 @ 1710.7 MHz (worst case channel above 1GHz LTE Band 4) User separation distance 20 cm Equation for predicting RF field was used to determine the maximum antenna gain that can be used with the EUT and still comply with the requirements: 𝑃𝐺 𝑆= 4𝜋𝑟 2 Where: S=the power flux P=input power of the antenna G=antenna gain relative to an isotropic antenna r=distance from the antenna to the point of investigation TÜV SÜD AMERICA INC 10040 Mesa Rim Road San Diego, CA 92121-2912 Phone: 858 678 1400 FAX: 858 546 0364

From this formula, using 0.230329 mW/cm2 as S (worst case than FCC limit), 20 cm as r then the antenna gain G is calculated. This is the maximum antenna gain in dBi that can be used with the EUT while still in compliance with the power density requirements. 4𝜋𝑟 2 𝑆 𝐺= 𝑃 4𝜋(20 𝑐𝑚)2 (0.230329 𝑚𝑊/𝑐𝑚2 ) 𝐺= 316.0 𝑚𝑊 1157.76 𝐺= 316.0 𝑚𝑊 Therefore G = 3.67 dBi for Band 12 and 4.1 dBi for Band 5 (using the same calculation approach) Using the same calculation for LTE Band 2: 4𝜋(20 𝑐𝑚)2 (0.424313 𝑚𝑊/𝑐𝑚2 ) 𝐺= 316.0 𝑚𝑊 2132.83 𝐺= 316.0 𝑚𝑊 Therefore G = 6.74 dBi for Band 4 and 7.12 dBi for Band 2 (using the same calculation approach) Sincerely, Ferdie S. Custodio Name Authorized Signatory Title: Senior EMC/Wireless Test Engineer TÜV SÜD AMERICA INC 10040 Mesa Rim Road San Diego, CA 92121-2912 Phone: 858 678 1400 FAX: 858 546 0364


Document Created: 2017-06-02 11:28:08
Document Modified: 2017-06-02 11:28:08
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