Response To NTIA Manual Questions

0524-EX-CN-2018 Text Documents

BRAINERD HELICOPTERS, INC.

2018-07-16ELS_212823

GPS L1 Link Budget Satellite Tranmitter Transmitter Power (25 Watts) 14.25 dBW RF Losses in trasmitter path -1.25 dB Antenna Gain (with respect to an isotrope) 13.5 dBi Satellite EIRP (wrt isotropic radiator) 26.50 dBW 446.68 Watts Propagation Atmoshperic and Polarization Losses -0.5 dB  4 d 2  Free Space Path Loss   10 log10       where d = distance from antenna = 2.52E+07 meters P at h c =speed  L oss of light =     4 d    2 3.00E+08 m/sec f = frequency = 1.58E+09 Hz lambda = wavelength = c/f = 1.90E-01 meters 2 = -10log10 3.17E+08 1.90E-01 2 = -10log10 1.67E+09 Free Space Path Loss over Distance -184.43 dB Received Power on Earth -158.43 dBW -128.43 dBm 1.44E-04 pW Gain of Receive Antenna 38 dBic RF losses in 300 feet of LMR400UF cabling and connectors from Receive Antenna to Line Amplifier -6.7 dB Gain of Line Amplifier 20 dB RF Power at Input to Re-Radiating Antenna -77.13 dBm 19.36 pW Gain of Passive Re-Radiating Antenna 3 dBic Re-Radiated EIRP (wrt isotropic radiator) -74.13 dBm 38.64 pW Re-Radiated ERP (wrt dipole radiator) P a t h L o ss       4 d    2 -76.28 dBm 23.55 pW

 4 d 2  Free Space Path Loss   10 log10       where d = distance from antenna = 100 feet 2 = -10log10 383.023 1.90E-01 2 = -10log10 2.01E+03 Free Space Path Loss over Distance -66.07 dB RF power level at 100 ft distance = -140.20 dBm wrt isotropic antenna -142.35 dBm wrt dipole antenna

GPS L2 Link Budget Satellite Tranmitter Transmitter Power (4.32 Watts) 6.35 dBW RF Losses in trasmitter path -1.25 dB Antenna Gain (with respect to an isotrope) 11.5 dBi Satellite EIRP (wrt isotropic radiator) 16.60 dBW 45.71 Watts Propagation Atmoshperic and Polarization Losses -0.5 dB  4 d 2  Free Space Path Loss   10 log10       where d = distance from antenna = 2.52E+07 meters P at h c =  speed of light = L oss     4 d    2 3.00E+08 m/sec f = frequency = 1.23E+09 Hz lambda = wavelength = c/f = 2.44E-01 meters 2 = -10log10 3.17E+08 2.44E-01 2 = -10log10 1.30E+09 Free Space Path Loss over Distance -182.26 dB Received Power on Earth -166.16 dBW -136.16 dBm 2.42E-05 pW Gain of Receive Antenna 38 dBic RF losses in 300 feet of LMR400UF cabling and connectors from Receive Antenna to Line Amplifier -6.7 dB Gain of Line Amplifier 20 dB RF Power at Input to Re-Radiating Antenna -84.86 dBm 3.26 pW Gain of Passive Re-Radiating Antenna 3 dBic Re-Radiated EIRP (wrt isotropic radiator) -81.86 dBm 6.51 pW Re-Radiated ERP (wrt dipole radiator) P a t h L o ss       4 d    2 -84.01 dBm 3.97 pW

 4 d 2  Free Space Path Loss   10 log10       where d = distance from antenna = 100 feet 2 = -10log10 383.02298 2.44E-01 2 = -10log10 1.57E+03 Free Space Path Loss over Distance -63.90 dB RF power level at 100 ft distance = -145.77 dBm wrt isotropic antenna -147.92 dBm wrt dipole antenna


Document Created: 2018-07-16 11:20:36
Document Modified: 2018-07-16 11:20:36
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