Attachment Exhibit C SES-AMD-20180806-02065

Attachment Exhibit C

This document pretains to SES-AMD-20180806-02065 for Amended Filing on a Satellite Earth Station filing.

IBFS_SESAMD2018080602065_1483459

Exhibit C
Response to Question 28 for Napa, California Antenna

This attachment analyzes the power-flux density near the proposed transmit antenna.
The antenna will be a square flat plate antenna 0.89m x 0.89m with transmit gain 22.2 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 1660.5 MHz. At this frequency the maximum permissible exposure
to RF fields in a controlled environment is 5 mW/cm2.

The calculations are based on data provided by the antenna manufacturer. See Figure
1. The maximum allowable exposure value of 5 mW/cm2 is equal to 7 dBmW/cm2. From
Figure 1, it can be seen that this value is never reached for the antenna at an input power level
of 1 W. For the case that this application applies to, a 16.5 dBW signal out of a 22.2 dBi gain
antenna, the input power is -5.7 dBW or 0.269W or 3.7 times smaller than the values of Figure
1. Therefore, the conclusion is the same, the maximum value of 5 mW/cm2 is not reached for
the case that this application applies to.

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: 2018-08-02 13:09:33
Document Modified: 2018-08-02 13:09:33

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