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Allocations

Intro to Allocations
 
U.S. Non-Federal-Government Allocations
55.78 - 56.9 GHz
 EARTH EXPLORATION-SATELLITE (passive)
FIXED US379
INTER-SATELLITE 5.556A
MOBILE 5.558
SPACE RESEARCH (passive)
FCC Rule Parts:
Satellite Communications (25)

U.S. Federal Government Allocations
55.78 - 56.9 GHz
 EARTH EXPLORATION-SATELLITE (passive)
FIXED US379
INTER-SATELLITE 5.556A
MOBILE 5.558
SPACE RESEARCH (passive)

ITU Region 1 Allocations
55.78 - 56.9 GHz
 EARTH EXPLORATION-SATELLITE (passive)
FIXED 5.557A
INTER-SATELLITE 5.556A
MOBILE 5.558


ITU Region 2 Allocations
55.78 - 56.9 GHz
 EARTH EXPLORATION-SATELLITE (passive)
FIXED 5.557A
INTER-SATELLITE 5.556A
MOBILE 5.558


ITU Region 3 Allocations
55.78 - 56.9 GHz
 EARTH EXPLORATION-SATELLITE (passive)
FIXED 5.557A
INTER-SATELLITE 5.556A
MOBILE 5.558


SpectrumWiki

Band Uses (55.78 - 56.9 GHz)

None found.

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)



5.556A   Use of the bands 54.25-56.9 GHz, 57-58.2 GHz and 59-59.3 GHz by the inter-satellite service is limited to satellites in the geostationary-satellite orbit. The single-entry power flux-density at all altitudes from 0 km to 1 000 km above the Earth’s surface produced by a station in the inter-satellite service, for all conditions and for all methods of modulation, shall not exceed –147 dB(W/(m2 · 100 MHz)) for all angles of arrival. (WRC-97)



5.557   Additional allocation: in Japan, the band 55.78-58.2 GHz is also allocated to the radiolocation service on a primary basis. (WRC-97)



5.557A   In the band 55.78-56.26 GHz, in order to protect stations in the Earth exploration-satellite service (passive), the maximum power density delivered by a transmitter to the antenna of a fixed service station is limited to –26 dB(W/MHz). (WRC 2000)



5.558   In the bands 55.78-58.2 GHz, 59-64 GHz, 66-71 GHz, 122.25-123 GHz, 130-134 GHz, 167-174.8 GHz and 191.8-200 GHz, stations in the aeronautical mobile service may be operated subject to not causing harmful interference to the inter-satellite service (see No. 5.43). (WRC 2000)



US353   In the bands 56.24-56.29 GHz, 58.422-58.472 GHz, 59.139-59.189 GHz, 59.566-59.616 GHz, 60.281-60.331 GHz, 60.41-60.46 GHz, and 62.461-62.511 GHz, space-based radio astronomy observations may be made on an unprotected basis.

US379   In the band 55.78-56.26 GHz, in order to protect stations in the Earth exploration-satellite service (passive), the maximum power density delivered by a transmitter to the antenna of a fixed service station is limited to −28.5 dB(W/MHz).

US532   In the bands 21.2-21.4 GHz, 22.21-22.5 GHz, and 56.26-58.2 GHz, the space research and Earth exploration-satellite services shall not receive protection from the fixed and mobile services operating in accordance with the Table of Frequency Allocations.

SpectrumWiki

Band Uses (55.78 - 56.9 GHz)
None found.
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Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 55.78 GHz 56.34 GHz 56.9 GHz
Wavelength 5.4 mm 5.3 mm 5.3 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 2.3 mm2 2.3 mm2 2.2 mm2
Free space loss (1 m) 67.4 dB 67.5 dB 67.6 dB
Free space loss (1 km) 127.4 dB 127.5 dB 127.6 dB
Free space loss (10 km) 147.4 dB 147.5 dB 147.6 dB
Free space loss (100 km) 167.4 dB 167.5 dB 167.6 dB
Free space loss (1000 km) 187.4 dB 187.5 dB 187.6 dB
Free space loss
(35,786 km = GEO orbit) 		218.5 dB 218.5 dB 218.6 dB
Free space loss (378,370 km = Moon) 238.9 dB 239.0 dB 239.1 dB
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