Allocations

 
U.S. Non-Federal-Government Allocations
26.95 - 26.96 MHz
FIXED

FCC Rule Parts:
ISM Equipment (18)

U.S. Federal Government Allocations
26.95 - 27.41 MHz


ITU Region 1 Allocations
26.35 - 27.5 MHz
FIXED
MOBILE except aeronautical mobile


ITU Region 2 Allocations
26.42 - 27.5 MHz
FIXED
MOBILE except aeronautical mobile


ITU Region 3 Allocations
26.35 - 27.5 MHz
FIXED
MOBILE except aeronautical mobile


SpectrumWiki


Footnotes


5.150 The following bands:

13553-13567 kHz(centre frequency 13560kHz),
26957-27283 kHz(centre frequency 27120 kHz),
40.66-40.70 MHz(centre frequency 40.68 MHz),
902-928 MHzin Region 2 (centre frequency 915 MHz),
2400-2500 MHz(centre frequency 2450 MHz),
5725-5875 MHz(centre frequency 5800 MHz), and
24-24.25 GHz(centre frequency 24.125 GHz)

are also designated for industrial, scientific and medical (ISM) applications. Radiocommunication services operating within these bands must accept harmful interference which may be caused by these applications. ISM equipment operating in these bands is subject to the provisions of No. 15.13.

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

 
Citizens Band (CB) Radio
Industrial, Scientific, and Medical Devices (ISM, FCC Part 18)
Ocean Radar (WRC-2012)
Radio Control (R/C) Radio Service
Access Broadband over Power Line (Access BPL)


Related Documents, Links, and Multimedia:
FCC Proceeding (1)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 26350 kHz 26925 kHz 27500 kHz
Wavelength 11.4 m 11.1 m 10.9 m
Band designator(s) HF HF HF
Isotropic collecting area 10.3 m2 9.9 m2 9.5 m2
Free space loss (1 m) 0.9 dB 1.1 dB 1.2 dB
Free space loss (1 km) 60.9 dB 61.1 dB 61.2 dB
Free space loss (10 km) 80.9 dB 81.1 dB 81.2 dB
Free space loss (100 km) 100.9 dB 101.1 dB 101.2 dB
Free space loss (1000 km) 120.9 dB 121.1 dB 121.2 dB
Free space loss
(35,786 km = GEO orbit)
151.9 dB 152.1 dB 152.3 dB
Free space loss (378,370 km = Moon) 172.4 dB 172.6 dB 172.8 dB