Attachment E871193RADHAD

This document pretains to SES-MOD-20090107-00006 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2009010700006_688260

Radiation Hazard Study All of the Equations below use the following units! Antenna Gain 52.7dbi = 186208.71 @ 14.0GHz Power to feed max +25.56DBW / 360 watts Antenna diameter 3.7 meters Distance to satellite 39,000 KM or 39,000,000 meters λ = wavelength @ 14.0GHz (.0214285714) in meters Equations from OET Bulletin #65, oet65.pdf Page # 27 equation #11 Power density @ antenna surface MAX P = Power to feed in Watts (360) A = Antenna diameter in Meters (3.7) S (surface) = 389.18 Page # 27 equation #12 Extent of Near field in Meters D = Antenna diameter in Meters (3.7) λ = Wavelength in Meters using frequency of 14.0GHz (.0214285714) Rnf = 159.71 Page # 28 equation #13 & 14 Max near field power density & Aperture efficiency P = Power to feed in Watts (360) D = antenna diameter in Meters (3.7) λ = Wavelength in Meters using frequency of 14.0GHz (.0214285714) Snf = 286.47 Aperture efficiency = .632824 Page # 29 Equation #16 Distance to beginning of far field in Meters D = Antenna diameter in Meters (3.7) λ = Wavelength in Meters using frequency of 14.0GHz (.0214285714) Rff = 383.320 Page # 29 Equation #17 Transition region distance in Meters from antenna Rnf - Rff 159.71 - 383.32 Page # 29 Equation # 18 Power density @ satellite S = Power density at a distance of (39,000 KM) P = Power to feed in Watts (360) R = Distance in Meters to Satellite (39,000,000) Sff = 3.50722340 –9 Watts or -84.55 dbw/m squared Arizona State University E871193 File # SES-MOD-INTR200802672 12/29/08


Document Created: 2009-01-12 19:06:23
Document Modified: 2009-01-12 19:06:23
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