Allocations

 
U.S. Non-Federal-Government Allocations
25.25 - 25.5 GHz
Inter-satellite 5.536
Standard frequency and time signal-satellite (Earth-to-space)

FCC Rule Parts:
RF Devices (15)

U.S. Federal Government Allocations
25.25 - 25.5 GHz
FIXED
INTER-SATELLITE 5.536
MOBILE
Standard frequency and time signal-satellite (Earth-to-space)


ITU Region 1 Allocations
25.25 - 25.5 GHz
FIXED 5.534A
INTER-SATELLITE 5.536
MOBILE 5.338A 5.532AB
Standard frequency and time signal-satellite (Earth-to-space)


ITU Region 2 Allocations
25.25 - 25.5 GHz
FIXED 5.534A
INTER-SATELLITE 5.536
MOBILE 5.338A 5.532AB
Standard frequency and time signal-satellite (Earth-to-space)


ITU Region 3 Allocations
25.25 - 25.5 GHz
FIXED 5.534A
INTER-SATELLITE 5.536
MOBILE 5.338A 5.532AB
Standard frequency and time signal-satellite (Earth-to-space)


SpectrumWiki


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)

5.532AB   The frequency band 24.25-27.5 GHz 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. Resolution 242 (WRC 19) applies. (WRC 19)

5.534A   The allocation to the fixed service in the frequency band 25.25-27.5 GHz is identified in Region 2 for use by high-altitude platform stations (HAPS) in accordance with the provisions of Resolution 166 (WRC 19). Such use of the fixed-service allocation by HAPS shall be limited to the ground-to-HAPS direction in the frequency band 25.25-27.0 GHz and to the HAPS-to-ground direction in the frequency band 27.0-27.5 GHz. Furthermore, the use of the frequency band 25.5-27.0 GHz by HAPS shall be limited to gateway links. This identification does not preclude the use of this frequency band by other fixed-service applications or by other services to which this band is allocated on a co-primary basis, and does not establish priority in the Radio Regulations. (WRC 19)

5.536   Use of the 25.25-27.5 GHz band by the inter-satellite service is limited to space research and Earth exploration-satellite applications, and also transmissions of data originating from industrial and medical activities in space.


SpectrumWiki

 
24 GHz Market Area Service
NASA Deep Space Network (DSN)
NASA Tracking and Data Relay Satellite System (TDRSS)
Unlicensed Level Probing Radars
Airport Body Scanners
Possible MSS Allocations (WRC-15 Agenda Item 1.10)


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

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 25.25 GHz 25.375 GHz 25.5 GHz
Wavelength 1.2 cm 1.2 cm 1.2 cm
Band designator(s) SHF; K-band (IEEE) SHF; K-band (IEEE) SHF; K-band (IEEE)
Isotropic collecting area 0.1 cm2 0.1 cm2 0.1 cm2
Free space loss (1 m) 60.5 dB 60.5 dB 60.6 dB
Free space loss (1 km) 120.5 dB 120.5 dB 120.6 dB
Free space loss (10 km) 140.5 dB 140.5 dB 140.6 dB
Free space loss (100 km) 160.5 dB 160.5 dB 160.6 dB
Free space loss (1000 km) 180.5 dB 180.5 dB 180.6 dB
Free space loss
(35,786 km = GEO orbit)
211.6 dB 211.6 dB 211.7 dB
Free space loss (378,370 km = Moon) 232.1 dB 232.1 dB 232.1 dB
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