Radiation Hazard Analysis

0379-EX-ST-2003 Text Documents

Hughes Network Systems, Inc.

2003-10-08ELS_63246

RADIATION CALCULATIONS FOR 0.66 meter EARTH STATION Nomenclature Formula Value Unit INPUT PARAMETERS M = Antenna Aperture Major Axis 0.74 meters m = Antenna Aperture Minor Axis 0.59 meters d = Diameter of Feed Mouth 0.029 meters P = Max Power into Antenna 0.5 Watts n = Apperture Effeciency 64% k = Wavelength @ 30 GHz 0.0100 meters CALCULATED VALUES A = Area of Reflector PIxMxm/4 0.343 meters^2 l = Length of Near Field M^2/4k 14 meters L = Beginning of Far Field 0.6M^2/k 33 meters G = Antenna Gain @ 30 GHz n(4xPIxA)/k^2 27,582 (44.4) dBi a = Area of Feed Mouth PI*d^2/4 0.0007 meters^2 POWER DENSITY CALCULATIONS Maximum Power Density in Region Region Hazard Assessment Formula Value (mW/cm^2) (FCC MPE Limit = 1 mW/cm^2) 1 Near Field 4nP/A 0.37 < FCC MPE Limit 2 Far Field GP/(4(PI)L^2) 0.10 < FCC MPE Limit 3 Transition <= Nr Fld Region 0.37 < FCC MPE Limit 4 Near Reflector Surface 4P/A 0.58 < FCC MPE Limit 5 Between Reflector & Ground P/A 0.15 < FCC MPE Limit 6 Between Reflector and Feed 4P/a 302.8 > FCC MPE Limit (See Text)

RADIATION CALCULATIONS FOR 0.74 meter EARTH STATION Nomenclature Formula Value Unit INPUT PARAMETERS M = Antenna Aperture Major Axis 0.98 meters m = Antenna Aperture Minor Axis 0.56 meters w = Major Axis of Feed Mouth 0.065 meters h = Minor Axis of Feed Mouth 0.042 meters P = Max Power into Antenna 1.00E-08 Watts n = Apperture Effeciency 67% k = Wavelength @ 19.95 GHz 0.0150 meters CALCULATED VALUES A = Area of Reflector PIxMxm/4 0.431 meters^2 l = Length of Near Field M^2/4k 16 meters L = Beginning of Far Field 0.6M^2/k 38 meters G = Antenna Gain @ 19.95 GHz n(4xPIxA)/k^2 16,051 (42.1) dBi a = Area of Feed Mouth PIxwxh/4 0.002 meters^2 POWER DENSITY CALCULATIONS Maximum Power Density in Region Region Hazard Assessment Formula Value (mW/cm^2) (FCC MPE Limit = 1 mW/cm^2) 1 Near Field 4nP/A 6.22E-09 < FCC MPE Limit 2 Far Field GP/(4(PI)L^2) 8.70E-10 < FCC MPE Limit 3 Transition <= Nr Fld Region 6.22E-09 < FCC MPE Limit 4 Near Reflector Surface 4P/A 9.28E-09 < FCC MPE Limit 5 Between Reflector & Ground P/A 2.32E-09 < FCC MPE Limit 6 Between Reflector and Feed 4P/a 1.84E-06 < FCC MPE Limit

RADIATION CALCULATIONS FOR 0.74 meter EARTH STATION Nomenclature Formula Value Unit INPUT PARAMETERS M = Antenna Aperture Major Axis 0.98 meters m = Antenna Aperture Minor Axis 0.56 meters w = Major Axis of Feed Mouth 0.065 meters h = Minor Axis of Feed Mouth 0.042 meters P = Max Power into Antenna 0.5 Watts n = Apperture Effeciency 67% k = Wavelength @ 30 GHz 0.0100 meters CALCULATED VALUES A = Area of Reflector PIxMxm/4 0.431 meters^2 l = Length of Near Field M^2/4k 24 meters L = Beginning of Far Field 0.6M^2/k 58 meters G = Antenna Gain @ 30 GHz n(4xPIxA)/k^2 36,295 (45.6) dBi a = Area of Feed Mouth PIxwxh/4 0.002 meters^2 POWER DENSITY CALCULATIONS Maximum Power Density in Region Region Hazard Assessment Formula Value (mW/cm^2) (FCC MPE Limit = 1 mW/cm^2) 1 Near Field 4nP/A 0.31 < FCC MPE Limit 2 Far Field GP/(4(PI)L^2) 0.04 < FCC MPE Limit 3 Transition <= Nr Fld Region 0.31 < FCC MPE Limit 4 Near Reflector Surface 4P/A 0.46 < FCC MPE Limit 5 Between Reflector & Ground P/A 0.12 < FCC MPE Limit 6 Between Reflector and Feed 4P/a 92.2 > FCC MPE Limit (See Text)

RADIATION HAZARD CALCULATIONS FOR 0.98 meter EARTH STATION Nomenclature Formula Value Unit INPUT PARAMETERS D = Antenna Diameter 0.98 meters d = Diameter of Feed Mouth 0.049 meters P = Max Power into Antenna 0.5 Watts n = Apperture Effeciency 67% k = Wavelength @ 30 GHz 0.0100 meters CALCULATED VALUES A = Area of Reflector PI*D^2/4 0.754 meters^2 l = Length of Near Field D^2/4k 24 meters L = Beginning of Far Field 0.6D^2/k 58 meters G = Antenna Gain @ 30 GHz n(PI*D/k)^2 63,516 48.0 dBi a = Area of Feed Mouth PI*d^2/4 0.0019 meters^2 POWER DENSITY CALCULATIONS Maximum Power Density in Region Region Hazard Assessment Formula Value (mW/cm^2) (FCC MPE Limit = 1 mW/cm^2) 1 Near Field 4nP/A 0.18 < FCC MPE Limit 2 Far Field GP/(4(PI)L^2) 0.08 < FCC MPE Limit 3 Transition <= Nr Fld Region 0.18 < FCC MPE Limit 4 Near Reflector Surface 4P/A 0.27 < FCC MPE Limit 5 Between Reflector & Ground P/A 0.07 < FCC MPE Limit 6 Between Reflector and Feed 4P/a 106.1 > FCC MPE Limit ( See Text )


Document Created: 2003-10-08 14:13:50
Document Modified: 2003-10-08 14:13:50
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