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Allocations

Intro to Allocations

U.S. Non-Federal-Government Allocations

51.4 - 52.6 GHz
FIXED US157
MOBILE

U.S. Federal Government Allocations

51.4 - 52.6 GHz
FIXED US157
MOBILE

ITU Region 1 Allocations

52.4 - 52.6 GHz
FIXED 5.338A
MOBILE

5.547 5.556

ITU Region 2 Allocations

52.4 - 52.6 GHz
FIXED 5.338A
MOBILE

5.547 5.556

ITU Region 3 Allocations

52.4 - 52.6 GHz
FIXED 5.338A
MOBILE

5.547 5.556

SpectrumWiki

Band Uses (51.4 - 52.6 GHz)

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

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)

5.547 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)

5.556 In the bands 51.4-54.25 GHz, 58.2-59 GHz and 64-65 GHz, radio astronomy observations may be carried out under national arrangements. (WRC 2000)

US157 In the band 51.4-52.6 GHz, for stations in the fixed service, the unwanted emissions power in the band 52.6-54.25 GHz shall not exceed −33 dBW/100 MHz (measured at the input of antenna).

SpectrumWiki

Band Uses (51.4 - 52.6 GHz)

2019 World Radiocommunication Conference (WRC-19) Agenda Item 1.6

1.6 to consider the development of a regulatory framework for non-GSO FSS satellite systems that may operate in 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), in accordance with Resolution 159 [COM6/18] (WRC-15);

Frequency Bands
Band	Use	Service	Table
37.5 - 42.5 GHz	WRC-19 Agenda Item 1.6	Fixed-satellite	-
47.2 - 50.2 GHz	WRC-19 Agenda Item 1.6	Fixed-satellite	-
50.4 - 51.4 GHz	WRC-19 Agenda Item 1.6	Fixed-satellite	-

External Links:

WRC-19 (International Telecommunication Union)

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WRC-27 study for aeronautical and maritime earth stations in motion for Earth-to-space transmissions

The following item is on the agenda for WRC-27, agenda item 1.1:

"to consider the technical and operational conditions for the use of the frequency bands 47.2-50.2 GHz and 50.4-51.4 GHz (Earth-to-space), or parts thereof, by aeronautical and maritime earth stations in motion communicating with space stations in the fixed-satellite service and develop regulatory measures, as appropriate, to facilitate the use of the frequency bands 47.2-50.2 GHz and 50.4-51.4 GHz (Earth-to-space), or parts thereof, by aeronautical and maritime earth stations in motion communicating with geostationary space stations and non-geostationary space stations in the fixed-satellite service, in accordance with Resolution 176 (Rev.WRC-23)"

Frequency Bands
Band	Use	Service	Table
47.2 - 50.2 GHz	WRC-27 study for aeronautical and maritime earth stations in motion for Earth-to	Fixed-satellite	-
50.4 - 51.4 GHz	WRC-27 study for aeronautical and maritime earth stations in motion for Earth-to	Fixed-satellite	-

External Links:

Resolution 176 (WRC-23)

WRC-27 agenda (see Annex 1)

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WRC-27 agenda item regarding NGSO FSS gateway earth stations (Earth-to-space)

WRC-27 Agenda Item 1.3:

to consider studies relating to the use of the frequency band 51.4-52.4 GHz to enable use by gateway earth stations transmitting to non geostationary-satellite orbit systems in the fixed-satellite service (Earth-to-space), in accordance with Resolution 130 (WRC-23);

Frequency Bands
Band	Use	Service	Table
51.4 - 52.4 GHz	WRC-27 agenda item regarding NGSO FSS gateway earth stations (Earth-to-space)	Fixed-satellite	-

External Links:

WRC-27 Agenda (see Annex 1)

Resolution 130 (WRC-23)

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WRC-27 agenda item regarding technical/regulatory rules for FSS networks for equitable access

WRC agenda item 1.6:

to consider technical and regulatory measures for fixed-satellite service satellite networks/systems in the frequency bands 37.5-42.5 GHz (space-to-Earth), 42.5-43.5 GHz (Earth-to-space), 47.2-50.2 GHz (Earth-to-space) and 50.4-51.4 GHz (Earth-to-space) for equitable access to these frequency bands, in accordance with Resolution 131 (WRC-23)

Frequency Bands
Band	Use	Service	Table
37.5 - 42.5 GHz	WRC-27 agenda item regarding technical/regulatory rules for FSS networks for equitable access.	Fixed-satellite	-
42.5 - 43.5 GHz	WRC-27 agenda item regarding technical/regulatory rules for FSS networks for equitable access	Fixed-satellite	-
47.2 - 50.2 GHz	WRC-27 agenda item regarding technical/regulatory rules for FSS networks for equitable access	Fixed-satellite	-
50.4 - 51.4 GHz	WRC-27 agenda item regarding technical/regulatory rules for FSS networks for equitable access	Fixed-satellite	-

External Links:

Resolution 131 (WRC-23)

WRC-27 Agenda (see Annex 1)

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Related Documents, Links, and Multimedia:

FCC Proceeding (3)

Boeing Petition for FSS Uplink Spectrum in 50.4-52.4 GHz

According to Boeing:

Currently, FSS V-band allocations exist for four and a half gigahertz of downlink spectrum (37.5-42.0 GHz, space-to-Earth). To this existing allocation, the Commission has appropriately proposed adding an additional one half gigahertz of downlink spectrum at 42.0-42.5 GHz in order to make more intensive use of this underused block while maintaining adequate protection for radio astronomy in the adjacent 42.5-43.5 GHz band. This action will create five gigahertz of FSS V-band downlink spectrum.

There are currently four gigahertz of allocated FSS uplink spectrum (47.2-50.2 GHz and 50.4-51.4 GHz, Earth-to-space) in the United States, although the upper most one gigahertz has not been designated for FSS use in Part 25 of the Commission’s rules. To realize the full benefits of nationwide broadband via high data-rate V-band FSS, the Commission should authorize FSS Earth-to-space operations in the 50.4-51.4 GHz band and allocate the 51.4-52.4 GHz band for FSS uplinks to create a full five gigahertz of paired spectrum for V-band FSS operations.

Frequencies/Bands

50.4 - 52.4 GHz

Document type and status: FCC proceeding (Current)
Document date or date of hyperlink query: September 19, 2016
Fcc Docket(s): RM 11773

Boeing Petition for FSS Uplink Spectrum in 50.4-52.4 GHz

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FCC Above 24 GHz Report and Order and Further Notice of Proposed Rulemaking

According to the FCC:

Today, we take a significant step towards securing the Nation’s future in the next generational evolution of wireless technology to so-called 5G. We build upon years of successful spectrum policy – including flexible use, unlicensed, and sharing policies – to create service rules for using four spectrum bands above 24 GHz. These high frequencies previously have been best suited for satellite or fixed microwave applications; however, recent technological breakthroughs have newly enabled advanced mobile services in these bands, notably including very high speed and low latency services. To promote the deployment of these highly beneficial technologies, we are acting quickly –- more quickly than most of our counterparts around the world – to establish a coherent framework built on a robust public record. In addition to this significant step forward, we will also continue to explore new opportunities to make additional bands available and to explore other issues, including robust Federal sharing, raised in the accompanying Further Notice of Proposed Rulemaking.

Frequencies/Bands

24.25 - 24.45 GHz

24.75 - 25.25 GHz

27.5 - 28.35 GHz

31.8 - 33 GHz

37 - 40 GHz

42 - 42.5 GHz

47.2 - 50.2 GHz

50.4 - 52.6 GHz

64 - 71 GHz

71 - 76 GHz

81 - 86 GHz

95 - 300 GHz

Document type and status: FCC proceeding (Current)
Document date or date of hyperlink query: September 21, 2016
Fcc Docket(s): GN 14-177, IB 15-256, RM-1164, WT 10-112, IB 97-95

FCC Above 24 GHz Report and Order and Further Notice of Proposed Rulemaking

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FCC FNPRM and NPRM on Additional Satellite Spectrum

According to the FCC:

We initiate these proceedings to explore opportunities to make over 20,000 megahertz of spectrum available for satellite use across four bands.

In the Further Notice of Proposed Rulemaking (FNPRM), we seek further comment on ways to use the 12.7-13.25 GHz band (12.7 GHz band) and the 42.0-42.5 GHz band (42 GHz band) more efficiently and intensively, in order to promote technological innovation, the growth of the nation’s economy, and greater connectivity for the American public. Previously, the Commission has sought comment on ways that the 12.7 GHz band and 42 GHz band could be used more intensively by terrestrial wireless communications to achieve these goals. This FNPRM seeks comment on ways that these bands could be used more intensively by satellite communications, as an alternative or a complement to the previous proposals for terrestrial wireless communications in these bands.

We are interested in opening the 12.7 GHz band to a wider range of satellite operations by eliminating regulatory restrictions that prevent intensive satellite use of the band. Geostationary orbit (GSO) operations in the 12.75 13.25 GHz band are currently limited to communications between domestic and international points. Meanwhile, non-geostationary satellite orbit (NGSO) fixed-satellite service (FSS) operations in this band are limited to uplink communications with individually licensed earth stations. We are also interested in exploring more intensive use of the greenfield 42 GHz band by seeking comment on an allocation for fixed-satellite service. In both instances, we seek comment on ways to protect any incumbent spectrum users in the bands, as well as ways to protect spectrum users, particularly Federal operators, in adjacent bands.

In the accompanying Notice of Proposed Rulemaking, we seek comment on proposals to make additional spectrum resources available for satellite communications, particularly satellite broadband, in two bands the Commission has not previously considered. First, we invite comment on proposals to open up spectrum for satellite communications in the 51.4-52.4 GHz band (52 GHz band). Next, we seek comment on certain “W-band” frequencies (92.0-94.0 GHz, 94.1-100 GHz, 102.0-109.5 GHz, and 111.8-114.25 GHz). Both bands represent large swathes of spectrum that are largely unused for non-Federal services today. They are also the subject of considerable interest by stakeholders for commercial satellite use. Allocations for satellite services in these bands could facilitate the growth and innovation of next-generation satellite services and present a “first-mover” advantage for U.S. licensed operators.

Frequencies/Bands

12.7 - 13.25 GHz

42 - 42.5 GHz

51.4 - 52.4 GHz

92 - 94 GHz

94.1 - 100 GHz

102 - 109.5 GHz

111.8 - 114.25 GHz

Services

Mobile-satellite

Fixed-satellite

Document type and status: FCC proceeding (Current)
Document date or date of hyperlink query: May 28, 2025
Fcc Docket(s): SB 25-180, GN 22-352, WT 23-158, GN 14-177

FCC FNPRM and NPRM on Additional Satellite Spectrum

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Engineering Data

	Lower Frequency	Center Frequency	Upper Frequency
Frequency	51.4 GHz	52 GHz	52.6 GHz
Wavelength	5.8 mm	5.8 mm	5.7 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	2.7 mm²	2.6 mm²	2.6 mm²
Free space loss (1 m)	66.8 dB	66.8 dB	66.9 dB
Free space loss (1 km)	126.8 dB	126.8 dB	126.9 dB
Free space loss (10 km)	146.8 dB	146.8 dB	146.9 dB
Free space loss (100 km)	166.8 dB	166.8 dB	166.9 dB
Free space loss (1000 km)	186.8 dB	186.8 dB	186.9 dB
Free space loss (35,786 km = GEO orbit)	217.9 dB	217.8 dB	217.9 dB
Free space loss (378,370 km = Moon)	238.4 dB	238.3 dB	238.4 dB