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Allocations

Intro to Allocations
 
U.S. Non-Federal-Government Allocations
54.25 - 55.78 GHz
 EARTH EXPLORATION-SATELLITE (passive)
INTER-SATELLITE 5.556A
SPACE RESEARCH (passive)
FCC Rule Parts:
Satellite Communications (25)

U.S. Federal Government Allocations
54.25 - 55.78 GHz
 EARTH EXPLORATION-SATELLITE (passive)
INTER-SATELLITE 5.556A
SPACE RESEARCH (passive)

ITU Region 1 Allocations
54.25 - 55.78 GHz
 EARTH EXPLORATION-SATELLITE (passive)
INTER-SATELLITE 5.556A
SPACE RESEARCH (passive)

ITU Region 2 Allocations
54.25 - 55.78 GHz
 EARTH EXPLORATION-SATELLITE (passive)
INTER-SATELLITE 5.556A
SPACE RESEARCH (passive)

ITU Region 3 Allocations
54.25 - 55.78 GHz
 EARTH EXPLORATION-SATELLITE (passive)
INTER-SATELLITE 5.556A
SPACE RESEARCH (passive)

SpectrumWiki

Band Uses (54.25 - 55.78 GHz)

None found.

Footnotes


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)



5.556B   Additional allocation: in Japan, the band 54.25-55.78 GHz is also allocated to the mobile service on a primary basis for low-density use. (WRC-97)

SpectrumWiki

Band Uses (54.25 - 55.78 GHz)
None found.
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Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 54.25 GHz 55.015 GHz 55.78 GHz
Wavelength 5.5 mm 5.4 mm 5.4 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 2.4 mm2 2.4 mm2 2.3 mm2
Free space loss (1 m) 67.1 dB 67.3 dB 67.4 dB
Free space loss (1 km) 127.1 dB 127.3 dB 127.4 dB
Free space loss (10 km) 147.1 dB 147.3 dB 147.4 dB
Free space loss (100 km) 167.1 dB 167.3 dB 167.4 dB
Free space loss (1000 km) 187.1 dB 187.3 dB 187.4 dB
Free space loss
(35,786 km = GEO orbit) 		218.2 dB 218.3 dB 218.5 dB
Free space loss (378,370 km = Moon) 238.7 dB 238.8 dB 238.9 dB
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