Attachment RF Exposure Study

This document pretains to SES-LIC-20170201-00108 for License on a Satellite Earth Station filing.

IBFS_SESLIC2017020100108_1170657

FCC OET-65 RF Exposure Study - Satellite Uplink Facility NBC Digital Ku-band transportable uplink - “Blue” Antenna Vendor/Model Vislink-Advent Antenna Size: 1.9m Amplifier Make/Model: Xicom XTD-400K Amplifier Max Output Power: 400w Maximum operating power at flange: 100w FCC Maximum Permissible Exposure Levels Source Units Public/uncontrolled area exposure limit 47CFR §1.1310 1 mW/cm2 Occupational/controlled area exposure limit 47CFR §1.1310 5 mW/cm2 Input Data Antenna Diameter datasheet 190.0 cm Antenna surface area calculated 28353 cm2 Feed flange diameter estimated 4.200 cm Feed flange area calculated 13.85 cm2 Frequency (entry) 14250 MHz Wavelength (speed of light = 299,792,458 m/s) calculated 2.104 cm Transmit power at flange Application 100000 milliwatts Antenna gain datasheet 47.2 dBi Antenna gain factor calculated 52481 Height of base of antenna above ground measured 1.2 m Height of center of antenna above ground measured 1.5 m Minimum Elevation Angle (entry) 5 degrees Minimum Elevation Angle calculated 0.08727 radians FCC Maximum Permissible Exposure (MPE) Results calculated using FCC Bulletin OET-65 (Edition 97-01 August 1997) Uncontrolled Controlled Maximum power density at antenna surface Eq. 11 Pg 27 14.11 mW/cm2 Potential Hazard Potential Hazard Power density at feed flange Eq. 11 Pg 27 28871.65 mW/cm2 Potential Hazard Potential Hazard Extent of near-field Eq. 12 Pg 27 4290 cm Maximum near-field power density Eq. 13 Pg 28 9.2 mW/cm2 Potential Hazard Potential Hazard Aperture efficiency Eq. 14 Pg 28 0.65 Distance to beginning of far-field Eq. 16 Pg 29 10295.62 cm Power density at end of the transition regiion Eq. 17 Pg 29 3.83 mW/cm2 Potential Hazard Below FCC MPE Maximum far-field power density Eq. 18 Pg 29 3.940 mW/cm2 Potential Hazard Below FCC MPE Main Beam Far-field region safe exposure distances Minimum distance for public/uncontrolled exposure Eq. 18 Pg 29 204.36 meters Height at minimum antenna elevation angle calculated 19.31 meters Horizontal distance calculated 203.58 meters Minimum distance for occupational/controlled exposure Eq. 18 Pg 29 91.39 meters Height at minimum antenna elevation angle calculated 9.47 meters Horizontal distance calculated 91.04 meters Off-Axis Near Field/Transition Region safe exposure distances from antenna (20 dB reduction in power density at distances greater than one antenna diameter from the main beam center.) OET-65 Pg 30 Maximum off-axis near field power density Eq. 13 Pg 28 0.0920 mW/cm2 Below FCC MPE Below FCC MPE Public/uncontrolled exposure off-axis distance Diam/or Eq 17 1.9 meters Occupatonal/controlled exposure off-axis distance Diam/or Eq 17 1.9 meters Off-Axis Far Field safe exposure distances from the antenna (Based on side lobe attenuation required by FCC 25.209(a)(2)) Angle off main beam axis (1 to 48 degrees) (entry) 5 degree(s) Off-axis antenna gain factor OET-65 Pg 30* 28 Minimum distance for public/uncontrolled exposure Eq. 18 Pg 29 ** 102.96 meters * Gain converted from dBi to linear multiple ** If calculated distance is less than the start of the far field region, the distance to the start of the far field region is used. Prepared by Doug Lung, NBC Universal, January 26s, 2017


Document Created: 2019-04-19 00:10:29
Document Modified: 2019-04-19 00:10:29
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