Attachment Exhibit B

This document pretains to SES-MFS-20120322-00290 for Modification w/ Foreign Satellite (earth station) on a Satellite Earth Station filing.

IBFS_SESMFS2012032200290_945893

Exhibit B Hughes Network Systems Call Sign E060445 Request for Modification RADIATION CALCULATIONS FOR 0.69 meter EARTH STATION Nomenclature Formula Value Unit INPUT PARAMETERS M = Antenna Aperture Major Axis 0.78 meters m = Antenna Aperture Minor Axis 0.62 meters d = Diameter of Feed Mouth 0.152 meters f = frequency 30 GHz P = Max Power into Antenna 1.5 Watts n = Aperture Effeciency 65% k = Wavelength @ 30.00 GHz 0.0100 meters CALCULATED VALUES A = Area of Reflector PIxMxm/4 0.380 meters^2 l = Length of Near Field M^2/4k 15 meters L = Beginning of Far Field 0.6M^2/k 37 meters G = Antenna Gain @ 30.00 GHz n(4xPIxA)/k^2 31,067 (44.9) dBi a = Area of Feed Mouth PI*d^2/4 0.0181 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 1.00 < FCC MPE Limit 2 Far Field GP/(4(PI)L^2) 0.27 < FCC MPE Limit 3 Transition <= Nr Fld Region 1.00 < FCC MPE Limit 4 Near Reflector Surface 4P/A 1.54 > FCC MPE Limit (See Exhibit A) 5 Between Reflector & Ground P/A 0.38 < FCC MPE Limit 6 Between Reflector and Feed 4P/a 32.2 > FCC MPE Limit (See Exhibit A)


Document Created: 2012-03-22 16:03:06
Document Modified: 2012-03-22 16:03:06
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