Attachment 25.203(l) Analysis

This document pretains to SES-LIC-20171110-01243 for License on a Satellite Earth Station filing.

IBFS_SESLIC2017111001243_1302267

25.203(l) Analysis for 17/24 GHz BSS Feeder Link Antenna In this application, DIRECTV Enterprises, LLC (“DIRECTV”) requests operating authority to allow an earth station antenna at DIRECTV’s Northwest Uplink Diverse Facility (NWDF) in Ellensburg, WA to communicate with the 17/24 GHz BSS communications payloads on the T14 and T15 satellites. Under Section 25.203(l) of the Commission’s rules, feeder link facilities operating in the 25.05-25.25 GHz band can only be licensed in Economic Areas (“EA”) where no existing FS licensee is authorized, and feeder link operations must be coordinated with FS licensees in nearby EAs when the PFD of the feeder link transmitted signal is equal to or greater than -114 dBW/m2/MHz at the boundary of the FS licensed area. DIRECTV notes that the earth station that is the subject of this application is located in Kittitas County, WA. According to the Commission’s ULS database, there are no FS licensees authorized to operate in the relevant band in the EA that includes Kittitas County. The table on the following page was produced as a result of a search of the ULS database for active authorizations that include the 25.05-25.15 GHz band. As can be seen, the only active license in the relevant frequency band in the state of Washington is call sign WMF854 licensed in the Seattle SMSA, which includes King and Snohomish Counties. King County is adjacent to Kittitas County and Snohomish County is further removed from Kittitas County. The map on the following page was produced using Google Earth and it shows that the shortest distance from the proposed new earth station at NWDF to King County is approximately 58 km. The analysis below demonstrates that an antenna that just meets the FCC specified §25.209 off-axis performance would exceed the -114 dBW/m2/MHz level at the closest boundary of the Seattle SMSA by 1.2 dB. The estimated off-axis performance of the applied-for antenna is shown on a following page, and it is clear that the applied-for antenna will have off-axis performance several dB better than §25.209. Therefore, rather than a 1.2 dB shortfall in protection, it is fully expected that the applied-for antenna will meet the FS protection criteria with several dB of margin. 3.5m uplink King 24 GHz BSS Feeder Link Antenna Parameters County Max EIRP/carrier (dBW) 75.7 Antenna size (m) 3.5 Antenna on-axis gain (dBi) 56.7 Max power into antenna (dBW) 19.0 Bandwidth normalizing factor for 36 MHz carrier (dB) 15.6 Max power density into antenna (dBW/MHz) 3.4 Max gain towards King County (dBi) (§25.209) -10.0 Max eirp density towards King County (dBW/MHz) -6.6 Min distance to EA border (km) 58.0 Spreading loss over min distance to EA border (dB-m2) 106.3 Max PFD at EA boder (dBW/m2/MHz) -112.8 Margin in DEMS protection (dB) -1.2

ULS Search Results for Licensees in 25.05-25.15 GHz Call Sign Licensee Name Market/Area Status WMF846 FiberTower Spectrum Holdings LLC St. Louis, MO Active WMF848 FiberTower Spectrum Holdings LLC Kansas City, MO Active WMF850 FiberTower Spectrum Holdings LLC Baltimore SMSA Active WMF852 FiberTower Spectrum Holdings LLC Pittsburg, PA Active WMF854 FiberTower Spectrum Holdings LLC Seattle, WA Active WMT304 FiberTower Spectrum Holdings LLC New York, NY Active WMT307 FiberTower Spectrum Holdings LLC New York, NY Active WMT312 FiberTower Spectrum Holdings LLC Washington DC SMSA Active WMT315 FiberTower Spectrum Holdings LLC New York, NY Active WMT318 FiberTower Spectrum Holdings LLC Chicago, IL Active WMT325 FiberTower Spectrum Holdings LLC Kansas City, KS Active WMT328 FiberTower Spectrum Holdings LLC Boston, MA Active WMT331 FiberTower Spectrum Holdings LLC Dallas, TX Active WMT332 FiberTower Spectrum Holdings LLC Chicago, IL Active WMT333 FiberTower Spectrum Holdings LLC Boston, MA Active WMT334 FiberTower Spectrum Holdings LLC Miami, FL Active WMT335 FiberTower Spectrum Holdings LLC Atlanta, GA Active WMT338 FiberTower Spectrum Holdings LLC Washington DC SMSA Active WMT340 FiberTower Spectrum Holdings LLC Dallas, TX Active WPJD304 FiberTower Spectrum Holdings LLC Detroit, MI Active WPNH286 FiberTower Spectrum Holdings LLC Richmond, VA Active WPNH287 FiberTower Spectrum Holdings LLC Allentown, PA Active WPNH294 FiberTower Spectrum Holdings LLC Stockton, CA (San Joaquin Co.) Active BEA163 WPNH298 FiberTower Spectrum Holdings LLC Jacksonville, FL Active WPNH299 FiberTower Spectrum Holdings LLC Orlando, FL Active WPNH306 FiberTower Spectrum Holdings LLC Greensboro, NC Active WPNH315 FiberTower Spectrum Holdings LLC Buffalo, NY Active WPNH323 FiberTower Spectrum Holdings LLC Memphis, TN Active WPNH324 FiberTower Spectrum Holdings LLC Austin, TX Active WPNH325 FiberTower Spectrum Holdings LLC Nashville, TN Active WQCJ304 FiberTower Spectrum Holdings LLC Denver-Boulder-Greeley BEA141 Active

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Simulated performance of 3.5m Ka-band Reflector at 25 GHz


Document Created: 2017-11-10 14:19:07
Document Modified: 2017-11-10 14:19:07
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