17.3-17.7 GHz	(space-to-Earth) in Region 1,
18.3-19.3 GHz	(space-to-Earth) in Region 2,
19.7-20.2 GHz	(space-to-Earth) in all Regions,
39.5-40 GHz	(space-to-Earth) in Region 1,
40-40.5 GHz	(space-to-Earth) in all Regions,
40.5-42 GHz	(space-to-Earth) in Region 2,
47.5-47.9 GHz	(space-to-Earth) in Region 1,
48.2-48.54 GHz	(space-to-Earth) in Region 1,
49.44-50.2 GHz	(space-to-Earth) in Region 1,
and
27.5-27.82 GHz	(Earth-to-space) in Region 1,
28.35-28.45 GHz	(Earth-to-space) in Region 2,
28.45-28.94 GHz	(Earth-to-space) in all Regions,
28.94-29.1 GHz	(Earth-to-space) in Region 2 and 3,
29.25-29.46 GHz	(Earth-to-space) in Region 2,
29.46-30 GHz	(Earth-to-space) in all Regions,
48.2-50.2 GHz	(Earth-to-space) in Region 2.

This identification does not preclude the use of these bands by other fixed-satellite service applications or by other services to which these bands are allocated on a co-primary basis and does not establish priority in these Regulations among users of the bands. Administrations should take this into account when considering regulatory provisions in relation to these bands. See Resolution 143 (WRC-03).

5.552 The allocation of the spectrum for the fixed-satellite service in the bands 42.5-43.5 GHz and 47.2-50.2 GHz for Earth-to-space transmission is greater than that in the band 37.5-39.5 GHz for space-to-Earth transmission in order to accommodate feeder links to broadcasting satellites. Administrations are urged to take all practicable steps to reserve the band 47.2-49.2 GHz for feeder links for the broadcasting-satellite service operating in the band 40.5-42.5 GHz.

5.554A The use of the bands 47.5-47.9 GHz, 48.2-48.54 GHz and 49.44-50.2 GHz by the fixed-satellite service (space-to-Earth) is limited to geostationary satellites.

US297 The bands 47.2-49.2 GHz and 81-82.5 GHz are also available for feeder links for the broadcasting-satellite service.

SpectrumWiki

High Altitude Platform Station (HAPS)

The ITU has identified various bands for use by High Altitude Platform Stations (HAPS), which are defined as "a station located on an object at an altitude of 20 to 50 km and at a specified, nominal, fixed point relative to the Earth."

One set of bands (47.2-47.5 and 47.9-48.2 GHz) is identified on a worldwide basis. The others apply regionally or in a subset of countries.

Although there was a flurry of activity related to HAPS beginning in the late 1990's, no HAPS systems were ever developed. As of 2015, there is renewed interest in HAPS for applications involving telecommunications from Unmanned Aerial Systems (UAS).

HAPS is declared as an application of the fixed service.

Paired Frequency Bands
Paired Bands	Use	Service	Table
6440 - 6520 MHz	HAPS-to-ground in 5 countries (per 5.457)	Fixed	-
6560 - 6640 MHz	Ground-to-HAPS in 5 countries (per 5.457)	Fixed	-
27.9 - 28.2 GHz	HAPS-to-ground in 23 countries (per 5.537A)	Fixed	-
31 - 31.3 GHz	Ground-to-HAPS in 23 countries (per 5.543A)	Fixed	-

Frequency Bands
Band	Use	Service	Table
1885 - 1980 MHz	HAPS service links for IMT in Regions 1, 2, & 3 (per 5.388A)	Fixed	-
2010 - 2025 MHz	HAPS service links for IMT in Regions 1 & 3 (per 5.388A)	Fixed	-
2110 - 2160 MHz	HAPS service links for IMT in Regions 1, 2, & 3 (per 5.388A)	Fixed	-
2160 - 2170 MHz	HAPS service links for IMT in Region 2 (per 5.388A)	Fixed	-
47.2 - 47.5 GHz	HAPS (per 5.552A)	Fixed	-
47.9 - 48.2 GHz	HAPS (per 5.552A)	Fixed	-

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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 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 (1)

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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Engineering Data

	Lower Frequency	Center Frequency	Upper Frequency
Frequency	47 GHz	47.6 GHz	48.2 GHz
Wavelength	6.4 mm	6.3 mm	6.2 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	3.2 mm²	3.2 mm²	3.1 mm²
Free space loss (1 m)	66.0 dB	66.0 dB	66.1 dB
Free space loss (1 km)	126.0 dB	126.0 dB	126.1 dB
Free space loss (10 km)	146.0 dB	146.0 dB	146.1 dB
Free space loss (100 km)	166.0 dB	166.0 dB	166.1 dB
Free space loss (1000 km)	186.0 dB	186.0 dB	186.1 dB
Free space loss (35,786 km = GEO orbit)	217.1 dB	217.1 dB	217.1 dB
Free space loss (378,370 km = Moon)	237.5 dB	237.6 dB	237.6 dB