Attachment Exhibit B

This document pretains to SES-STA-20050223-00216 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2005022300216_419929

Exhibit B Hughes Network Systems, Inc. Call Sign E940460 Request for Special Temporary Authority RADIATION CALCULATIONS FOR 4.60 meter EARTH STATION Nomenclature Formula Value Unit INPUT PARAMETERS M = Antenna Aperture Major Axis 4.60 meters m = Antenna Aperture Minor Axis 4.60 meters d = Diameter of Feed Mouth 0.029 meters P = Max Power into Antenna 300.0 Watts n = Apperture Effeciency 66% k = Wavelength @ 14.25 GHz 0.0210526 meters CALCULATED VALUES A = Area of Reflector PIxMxm/4 16.619 meters^2 l = Length of Near Field M^2/4k 251 meters L = Beginning of Far Field 0.6M^2/k 603 meters G = Antenna Gain @ 14.25 GHz n(4xPIxA)/k^2 310,990 (54.9) 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 4.77 < FCC MPE Limit 2 Far Field GP/(4(PI)L^2) 2.04 < FCC MPE Limit 3 Transition <= Nr Fld Region 4.77 < FCC MPE Limit 4 Near Reflector Surface 4P/A 7.22 > FCC MPE Limit (See Attachment 1) 5 Between Reflector & Ground P/A 1.81 > FCC MPE Limit (See Attachment 1)


Document Created: 2005-03-01 11:43:03
Document Modified: 2005-03-01 11:43:03
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