Attachment Exhibit B

This document pretains to SES-LIC-20130813-00738 for License on a Satellite Earth Station filing.

IBFS_SESLIC2013081300738_1006175

Exhibit B Response to Question 28 This attachment analyzes the power-flux density near the proposed transmit antenna. The antenna will be a parabolic 0.84m antenna with transmit gain 20.6 dBi. The site will transmit a peak EIRP of 16.5 dBW. The power-flux density calculations in this exhibit are based on this peak EIRP value. These calculations follow the methodology outlined in OET Bulletin No. 65, “Evaluating Compliance with FCC-Specified Guidelines for Human Exposure to Radiofrequency Radiation.” The power-flux density calculations are made for a transmitting frequency of 1631.5 MHz. At this frequency the maximum permissible exposure to RF fields in a controlled environment is 5 mW/cm2. Far Field Calculations The distance to the beginning of the far field, Df for a circular aperture antenna is given by Equation 16 of OET Bulletin 65: Df = (0.6 D2) / λ For an antenna size of 0.84 m, the far field distance is 2.2 m. The maximum power-flux density in the far field is given by (using Equation 4 of OET Bulletin 65): Pd = EIRP/(4π Df2) For a 0.84 m antenna, the maximum power-flux density in the far field is 0.07 mW/cm2. Near Field Calculations The maximum power-flux density for the near field, Pd(nf) is given by Equation 13 of OET Bulletin 65: Pd(nf) = 16 ηPRF / (π D2) where PRF = RF power input to the antenna D = antenna diameter η = aperture efficiency (60% used) For a 0.84 m antenna, the maximum power-flux density in the near field is 0.17 mW/cm2. Conclusion This site is in a controlled environment. The general public does not have access to the site where the transmit antenna is located. The maximum permissible exposure to RF fields in a controlled environment is 5 mW/cm2 at L-band. The calculations show that the site will not exceed the permissible levels for exposure to RF radiation.


Document Created: 2013-08-05 11:49:38
Document Modified: 2013-08-05 11:49:38
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC