Attachment fccradhazTVU48C.doc SES-LIC-20050325-00351

Attachment fccradhazTVU48C.doc

This document pretains to SES-LIC-20050325-00351 for License on a Satellite Earth Station filing.

IBFS_SESLIC2005032500351_424721

EXHIBIT A - ANALYSIS OF NON-IONIZING RADIATION, 4.8 Meter

HARMFUL LEVELS OF RADIATION WILL NOT EXIST IN REGIONS NORMALLY
OCCUPIED BY PERSONNEL.
CRITERIA: ANSI SPECIFICATIONS REQUIRE THAT PERSONNEL NOT BE
EXPOSED TO LEVELS OF NON-IONIZING RADIATION EXCEEDING 5 mW / cm2.

THE FOLLOWING ANALYSES SUPPORT THIS DETERMINATION:

FAR FIELD ANALYSIS:
ANTENNA DIAMETER = 4.8 Meters
ANTENNA GAIN = 48.1 dBi (lin 64,565)
LAMBDA = 3*108 Meters / 6.175*109 Hz = 0.048583
EFFICIENCY = η = G/(π*D/λ)2 = 0.67
POWER MAX AT FLANGE = 450 Watts (26.5 dBW)
DISTANCE TO FAR FIELD = 2*D2/λ
= 46.08 / 0.048583
=948.5 Meters
ON-AXIS POWER DENSITY = G*P/4*π*Far Field Distance2
= 64,565 * 450 / 12.56637 * 758,792
= 2.57 W/m2
= 0.257 mW/cm2

LEVEL IS LESS THAN THE 5 mW/cm2 MAXIMUM ANSI LEVEL PERMITTED

NEAR FIELD ANALYSIS (Parallel Beam Region & Transition Region):

PARALLEL BEAM REGION ANALYSIS:
DISTANCE TO END OF PARALLEL BEAM (CYLINDER) REGION:
= DIAMETER2 / 2.5 * λ
= 23.04 / 0.12146
= 189.7 Meters
POWER DENSITY AT END OF PARALLEL BEAM REGION
= P / CYLINDRICAL PARALLEL BEAM AREA
= 450 / 18.1
= 24.86 W / m2
= 2.49 mW / cm2

LEVEL IS LESS THAN THE 5 mW/m2 MAXIMUM ANSI LEVEL PERMITTED
NO PERSONNEL WILL OCCUPY THE PARALLEL BEAM REGION DURING
OPERATION.

Document Created: 2005-03-25 11:25:35
Document Modified: 2005-03-25 11:25:35

© 2025 FCC.report
This site is not affiliated with or endorsed by the FCC