Allocations

 
U.S. Non-Federal-Government Allocations
50.4 - 51.4 GHz
FIXED
FIXED-SATELLITE (Earth-to-space) US156
MOBILE
MOBILE-SATELLITE (Earth-to-space)


U.S. Federal Government Allocations
50.4 - 51.4 GHz
FIXED
FIXED-SATELLITE (Earth-to-space) US156
MOBILE
MOBILE-SATELLITE (Earth-to-space)


ITU Region 1 Allocations
50.4 - 51.4 GHz
FIXED
FIXED-SATELLITE (Earth-to-space) 5.338A 5.550C
MOBILE
Mobile-satellite (Earth-to-space)


ITU Region 2 Allocations
50.4 - 51.4 GHz
FIXED
FIXED-SATELLITE (Earth-to-space) 5.338A 5.550C
MOBILE
Mobile-satellite (Earth-to-space)


ITU Region 3 Allocations
50.4 - 51.4 GHz
FIXED
FIXED-SATELLITE (Earth-to-space) 5.338A 5.550C
MOBILE
Mobile-satellite (Earth-to-space)


SpectrumWiki

Band Uses (50.4 - 51.4 GHz)

Footnotes

5.338A   In the frequency bands 1 350-1 400 MHz, 1 427-1 452 MHz, 22.55-23.55 GHz, 24.25-27.5 GHz, 30-31.3 GHz, 49.7 50.2 GHz, 50.4-50.9 GHz, 51.4-52.4 GHz, 52.4-52.6 GHz, 81-86 GHz and 92-94 GHz, Resolution 750 (Rev.WRC 19) applies. (WRC 19)

5.550C   The use of the frequency bands 37.5-39.5 GHz (space-to-Earth), 39.5-42.5 GHz (space to Earth), 47.2-50.2 GHz (Earth-to-space) and 50.4-51.4 GHz (Earth-to-space) by a non-geostationary satellite system in the fixed-satellite service is subject to the application of the provisions of No. 9.12 for coordination with other non-geostationary-satellite systems in the fixed-satellite service but not with non-geostationary-satellite systems in other services. Resolution 770 (WRC 19) shall also apply, and No. 22.2 shall continue to apply. (WRC 19)

US156   In the bands 49.7-50.2 GHz and 50.4-50.9 GHz, for earth stations in the fixed-satellite service (Earth-to-space), the unwanted emissions power in the band 50.2-50.4 GHz shall not exceed −20 dBW/ 200 MHz (measured at the input of the antenna), except that the maximum unwanted emissions power may be increased to −10 dBW/200 MHz for earth stations having an antenna gain greater than or equal to 57 dBi. These limits apply under clear-sky conditions. During fading conditions, the limits may be exceeded by earth stations when using uplink power control.

NG65  In the bands 24.75-25.25 GHz, 47.2-48.2 GHz, and 50.4-51.4 GHz, stations in the fixed and mobile services may not claim protection from individually licensed earth stations authorized pursuant to 47 CFR 25.136. However, nothing in this footnote shall limit the right of Upper Microwave Flexible Use Service licensees to operate in conformance with the technical rules contained in 47 CFR part 30. The Commission reserves the right to monitor developments and to undertake further action concerning interference between Upper Microwave Flexible Use Service and Fixed-Satellite Service, including aggregate interference to satellite receivers, if appropriate.

G117   In the bands 7.25-7.75 GHz, 7.9-8.4 GHz, 17.375-17.475 GHz, 17.6-21.2 GHz, 30-31 GHz, 33-36 GHz, 39.5-41 GHz, 43.5-45.5 GHz and 50.4-51.4 GHz, the Federal fixed-satellite and mobile-satellite services are limited to military systems.


SpectrumWiki

 
2019 World Radiocommunication Conference (WRC-19) Agenda Item 1.6
WRC-27 study for aeronautical and maritime earth stations in motion for Earth-to-space transmissions
WRC-27 agenda item regarding NGSO FSS gateway earth stations (Earth-to-space)
WRC-27 agenda item regarding technical/regulatory rules for FSS networks for equitable access


Related Documents, Links, and Multimedia:
FCC Proceeding (2)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 50.4 GHz 50.9 GHz 51.4 GHz
Wavelength 5.9 mm 5.9 mm 5.8 mm
Band designator(s) EHF (millimeter wave); V-band (IEEE) EHF (millimeter wave); V-band (IEEE) EHF (millimeter wave); V-band (IEEE)
Isotropic collecting area 2.8 mm2 2.8 mm2 2.7 mm2
Free space loss (1 m) 66.5 dB 66.6 dB 66.7 dB
Free space loss (1 km) 126.5 dB 126.6 dB 126.7 dB
Free space loss (10 km) 146.5 dB 146.6 dB 146.7 dB
Free space loss (100 km) 166.5 dB 166.6 dB 166.7 dB
Free space loss (1000 km) 186.5 dB 186.6 dB 186.7 dB
Free space loss
(35,786 km = GEO orbit)
217.6 dB 217.7 dB 217.7 dB
Free space loss (378,370 km = Moon) 238.1 dB 238.1 dB 238.2 dB
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