Exhibit B

0262-EX-PL-2004 Text Documents

Hughes Network Systems

2004-12-07ELS_68309

Exhibit B (25.5 GHz) to Experimental License Application File Number: 0262-EX-PL-2004 RADIATION CALCULATIONS FOR 0.30 meter TERRESTRIAL STATION Nomenclature Formula Value Unit INPUT PARAMETERS M = Antenna Aperture Major Axis 0.30 meters m = Antenna Aperture Minor Axis 0.30 meters d = Diameter of Feed Mouth 0.029 meters P = Max Power into Antenna 0.1 Watts n = Apperture Effeciency 70% k = Wavelength @ 25.5 GHz 0.0118 meters CALCULATED VALUES A = Area of Reflector PIxMxm/4 0.071 meters^2 l = Length of Near Field M^2/4k 2 meters L = Beginning of Far Field 0.6M^2/k 5 meters G = Antenna Gain @ 25.5 GHz n(4xPIxA)/k^2 4,492 (36.5) 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 = 5 mW/cm^2) 1 Near Field 4nP/A 0.40 < FCC MPE Limit 2 Far Field GP/(4(PI)L^2) 0.17 < FCC MPE Limit 3 Transition <= Nr Fld Region 0.40 < FCC MPE Limit 4 Near Reflector Surface 4P/A 0.57 < FCC MPE Limit 5 Between Reflector & Ground P/A 0.14 < FCC MPE Limit 6 Between Reflector and Feed 4P/a 60.6 > FCC MPE Limit (See Attachment 1)


Document Created: 2004-12-07 17:30:20
Document Modified: 2004-12-07 17:30:20
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