Allocations

 
U.S. Non-Federal-Government Allocations
38 - 39.5 GHz
FIXED
FIXED-SATELLITE (space-to-Earth) NG63
MOBILE NG175

Relevant FCC Auctions:
Auction 30 (39 GHz), $410,649,085
Auction 103 (Spectrum Frontiers), $7,558,703,201
 Total net auction bids: $7,969,352,286

U.S. Federal Government Allocations
38 - 38.6 GHz
FIXED
MOBILE


ITU Region 1 Allocations
38 - 39.5 GHz
FIXED 5.550D
FIXED-SATELLITE (space-to-Earth) 5.550C
MOBILE 5.550B
Earth exploration-satellite (space-to-Earth)


ITU Region 2 Allocations
38 - 39.5 GHz
FIXED 5.550D
FIXED-SATELLITE (space-to-Earth) 5.550C
MOBILE 5.550B
Earth exploration-satellite (space-to-Earth)


ITU Region 3 Allocations
38 - 39.5 GHz
FIXED 5.550D
FIXED-SATELLITE (space-to-Earth) 5.550C
MOBILE 5.550B
Earth exploration-satellite (space-to-Earth)


SpectrumWiki



Footnotes

5.547   The bands 31.8-33.4 GHz, 37-40 GHz, 40.5-43.5 GHz, 51.4-52.6 GHz, 55.78-59 GHz and 64-66 GHz are available for high-density applications in the fixed service (see Resolution 75 (WRC-2000)*). Administrations should take this into account when considering regulatory provisions in relation to these bands. Because of the potential deployment of high-density applications in the fixed-satellite service in the bands 39.5-40 GHz and 40.5-42 GHz (see No. 5.516B), administrations should further take into account potential constraints to high-density applications in the fixed service, as appropriate. *This resolution was revised by WRC-12. (WRC 07)

5.550B   The frequency band 37-43.5 GHz, or portions thereof, is identified for use by administrations wishing to implement the terrestrial component of International Mobile Telecommunications (IMT). This identification does not preclude the use of this frequency band by any application of the services to which it is allocated and does not establish priority in the Radio Regulations. Because of the potential deployment of FSS earth stations within the frequency range 37.5-42.5 GHz and high-density applications in the fixed-satellite service in the frequency bands 39.5-40 GHz in Region 1, 40-40.5 GHz in all Regions and 40.5-42 GHz in Region 2 (see No. 5.516B), administrations should further take into account potential constraints to IMT in these frequency bands, as appropriate. Resolution 243 (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)

5.550D   The allocation to the fixed service in the frequency band 38-39.5 GHz is identified for worldwide use by administrations wishing to implement high-altitude platform stations (HAPS). In the HAPS-to-ground direction, the HAPS ground station shall not claim protection from stations in the fixed, mobile and fixed-satellite services; and No. 5.43A does not apply. This identification does not preclude the use of this frequency band by other fixed-service applications or by other services to which this frequency band is allocated on a co-primary basis and does not establish priority in the Radio Regulations. Furthermore, the development of the fixed-satellite, fixed and mobile services shall not be unduly constrained by HAPS. Such use of the fixed-service allocation by HAPS shall be in accordance with the provisions of Resolution 168 (WRC 19). (WRC 19)

NG63  In the band 37.5-40 GHz, earth station operations in the fixed-satellite service (space-to-Earth) shall not claim protection from stations in the fixed and mobile services, except where individually licensed earth stations are authorized pursuant to 47 CFR § 25.136.

NG175  In the band 38.6-40 GHz, television pickup stations that were authorized on or before April 16, 2003, may continue to operate on a secondary basis to stations operating in accordance with the Table of Frequency Allocations.


SpectrumWiki

 
2019 World Radiocommunication Conference (WRC-19) Agenda Item 1.6
2023 World Radiocommunication Conference (WRC-23) Preliminary Agenda Item 2.4
WRC-27 agenda item regarding technical/regulatory rules for FSS networks for equitable access




Related Documents, Links, and Multimedia:
FCC Proceeding (4)




Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 38 GHz 38.75 GHz 39.5 GHz
Wavelength 7.9 mm 7.7 mm 7.6 mm
Band designator(s) EHF (millimeter wave); Ka-band (IEEE) EHF (millimeter wave); Ka-band (IEEE) EHF (millimeter wave); Ka-band (IEEE)
Isotropic collecting area 5.0 mm2 4.8 mm2 4.6 mm2
Free space loss (1 m) 64.0 dB 64.2 dB 64.4 dB
Free space loss (1 km) 124.0 dB 124.2 dB 124.4 dB
Free space loss (10 km) 144.0 dB 144.2 dB 144.4 dB
Free space loss (100 km) 164.0 dB 164.2 dB 164.4 dB
Free space loss (1000 km) 184.0 dB 184.2 dB 184.4 dB
Free space loss
(35,786 km = GEO orbit)
215.1 dB 215.3 dB 215.5 dB
Free space loss (378,370 km = Moon) 235.6 dB 235.8 dB 235.9 dB
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