Allocations

 
U.S. Non-Federal-Government Allocations
11.4 - 11.6 MHz
FIXED


U.S. Federal Government Allocations
11.4 - 11.6 MHz
FIXED


ITU Region 1 Allocations
11.4 - 11.6 MHz
FIXED


ITU Region 2 Allocations
11.4 - 11.6 MHz
FIXED


ITU Region 3 Allocations
11.4 - 11.6 MHz
FIXED


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Footnotes

US340   The band 2-30 MHz is available on a non-interference basis to Federal and non-Federal maritime and aeronautical stations for the purposes of measuring the quality of reception on radio channels. See 47 CFR 87.149 for the list of protected frequencies and bands within this frequency range. Actual communications shall be limited to those frequencies specifically allocated to the maritime mobile and aeronautical mobile services.


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Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 11400 kHz 11500 kHz 11600 kHz
Wavelength 26.3 m 26.1 m 25.8 m
Band designator(s) HF HF HF
Isotropic collecting area 55.0 m2 54.1 m2 53.2 m2
Free space loss (1 m) N/A (near field) N/A (near field) N/A (near field)
Free space loss (1 km) 53.6 dB 53.7 dB 53.7 dB
Free space loss (10 km) 73.6 dB 73.7 dB 73.7 dB
Free space loss (100 km) 93.6 dB 93.7 dB 93.7 dB
Free space loss (1000 km) 113.6 dB 113.7 dB 113.7 dB
Free space loss
(35,786 km = GEO orbit)
144.7 dB 144.7 dB 144.8 dB
Free space loss (378,370 km = Moon) 165.1 dB 165.2 dB 165.3 dB
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