Allocations

 
U.S. Non-Federal-Government Allocations
18.168 - 18.78 MHz
FIXED
Mobile


U.S. Federal Government Allocations
18.168 - 18.78 MHz
FIXED
Mobile


ITU Region 1 Allocations
18.168 - 18.78 MHz
FIXED
Mobile except aeronautical mobile


ITU Region 2 Allocations
18.168 - 18.78 MHz
FIXED
Mobile except aeronautical mobile


ITU Region 3 Allocations
18.168 - 18.78 MHz
FIXED
Mobile except aeronautical mobile


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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.

SpectrumWiki

 
Amateur Radio 17 m Band
QA chetu 1
Oppo
Access Broadband over Power Line (Access BPL)


Related Documents, Links, and Multimedia:
Band Plan (2)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 18168 kHz 18474 kHz 18780 kHz
Wavelength 16.5 m 16.2 m 16.0 m
Band designator(s) HF HF HF
Isotropic collecting area 21.7 m2 21.0 m2 20.3 m2
Free space loss (1 m) N/A (near field) N/A (near field) N/A (near field)
Free space loss (1 km) 57.6 dB 57.8 dB 57.9 dB
Free space loss (10 km) 77.6 dB 77.8 dB 77.9 dB
Free space loss (100 km) 97.6 dB 97.8 dB 97.9 dB
Free space loss (1000 km) 117.6 dB 117.8 dB 117.9 dB
Free space loss
(35,786 km = GEO orbit)
148.7 dB 148.9 dB 149.0 dB
Free space loss (378,370 km = Moon) 169.2 dB 169.3 dB 169.5 dB