Attachment Attachment

This document pretains to SES-LIC-20120210-00162 for License on a Satellite Earth Station filing.

IBFS_SESLIC2012021000162_938586

RF RADIATION HAZARD ANALYSIS Exhibit #B Antenna Dia. (D)=1.2 Meters 3.937 Feet Antenna Surface Area (SA)=1.131 sq meters Subreflector Dia. (DS)=N/A (prime focus offset) Subreflector Surface Area (AS)=N/A (prime focus offset) KU Wavelength at 14.250 GHz (LAMBDA)=.0211 meters Power at output of HPA flange=19.294 dB Path Loss to OMT (IL)=.55 dB Power at OMT Flange (P)=74.889 watts Antenna Gain at 14.250 GHz (G)=43.5 dBi Antenna Gain given in Power Ratio (GES)=2.239E+04 Antenna Aperture Efficiency (N)=.6981 Region Radiation Level Hazard Assessment Far Field (RF) 40.948 m 134.35 ft 7.957 mW/cem sq Potential Hazard Near Field (WF) 17.062m 55.979 ft 18.49 mW/cm sq Potential Hazard Transition Region (RT) equal to or less than Potential Hazard Ru<Rt<Rf 18.49 mW/cm sq Between Main Reflector and N/A Subreflector (WS) Main Reflector Region (WM) 13.243 mW/em sq Potential Hazard Power Density Between Reflector 6.622 mW/cm sq Potential Hazard and Ground Conclusion: Based on the above analysis, harmful areas of Radiation do exist in areas around the antenna and in the path of the antenna toward the satellite that it is pointed at. The Area occupied by the general public will not exceed the ANSI limit of 1 mW cm sq. because the antenna is mounted on top of the truck, which is at least 8 feet above the ground, and safety increases with look angles used by the Satellites in the United States on Dom. Sat. arch. The SNG will be marked with the standard radiation hazard warnings, and on the antenna itself. The warning signs will warn personnel to avoid the area around and in front of the reflector when the transmitter is operating. To ensure compliance with safety limits, the earth station transmitter will be turned off and marked to remain off whenever maintenance and repair personnel are required to work in the areas of potential hazard as defined in the above study. Additionally the earth station personnel will be trained to insure that the antenna path is clear at all times while the transmitter is in operation Note: See Exhibit #Ba for how the above calculations were made.

Exhibit Ba Analysis of Non—lonizing Radiation Antenna Diameter, (D)=..........22020000002. 2. D:=1.2 meters D—3.281=3.937 Feet DD Antenna Surface Area, (Sa)= .................222. Sa := n £200000002 Sa=1.131 sq meters Subreflector Diameter, (Ds)=..........00022.222222.2. Ds :=0 cm Ds—.3937=0 Inch‘s Area of Subreflector, (AS)=................2.02.22222. As :=1 sq cm Center Frequency, (Cf)=.................0.0.c ... CF := 14.250 GHz Wavelenght at (Cf), (Lambda)=.................... Lambda :=.0211 meters C—Band=.049 Ku—Band=.0211 Transmit Power at HPA or VPC Flange, (P1)=.. P1 =80 watts P2:=log(P1)—10 P2=19.031d0B Path Loss from HPA or VPC to OMT, (Lossy=.. Loss := .55 dB P3 =P2— Loss P3 =18.481 OMT Pwr in dB Power at OMT, (PJ=..........00..0000000c e p3 P:=10" P = 70.484 OMT Pwr in watts Antenna Gain at (Cf), (Gain)=...............llcll. Gain =43.5 dBi Gain Antenna Gain Converted to Power Ratio, (Ges). geg = 10 ‘° Ges=2.23910 Ratio Antenna Aperture Efficiency, (M)=.............2.22222. n ‘=.6981 Far Field (Rf)= Rf:= «60(DD) Rf=40.948 meters Rf3.281=134.35 Feet Lambda . . Ges—P Far Field Pwr Density (Wf)= Wf :=———————.1 Wf=7489 mw sq cm 41 —(RERA) . DD Near Field (Rn)= Rn i= ——————— Rn =17.062 meters Rn—3.281=55.979 Feet 4 Lambda . . _ 1l6nP Near Field Pwr Density (Wna)= Wn :=————— .1 Wnn =17.403 mw sq cm 1—(D D) Transition Region (Rt)= Rt:=Wn—1 Rt=17.403 mw sq cm (Equal to or less then) Pwr Density at Sub Reflector (Ws)= N/A (no sub reflector) mw sq cm Main Reflector Region Pwr Density (VWm)= Wm:= gs?l Wm = 12.464 mw sq cm a . . P Pwr Density between main reflector and ground (Wg)= Wg := S—l Wg =6.232 mw sq cm a


Document Created: 2012-02-08 10:11:10
Document Modified: 2012-02-08 10:11:10
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC