13-centimeter band

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The 13 centimeter, 2.3 GHz or 2.4 GHz band is a portion of the UHF (microwave) radio spectrum internationally allocated to amateur radio and amateur satellite use on a secondary basis. The amateur radio band is between 2300 MHz and 2450 MHz. The amateur satellite band is between 2400 MHz and 2450 MHz, and its use by satellite operations is on a non-interference basis to other radio users (ITU footnote 5.282). The license privileges of amateur radio operators include the use of frequencies and a wide variety of modes within these ranges for telecommunication. The allocations are the same in all three ITU Regions.[1]

In the 2300-2400 MHz range the band is also allocated to the Mobile service on a Primary basis which in practice leads to some challenging sharing scenarios and inconsistent allocations to amateurs at national level.

Above 2400 MHz amateur stations must accept harmful interference caused by industrial, scientific, and medical equipment operating in the band. The most common ISM devices that operate in the band are microwave ovens.

History

Frequencies of note

  • 2,320.1 MHz IARU Region-1 Narrowband Calling frequency and EME centre of activity
  • 2,304.1 MHz USA Narrowband calling and EME (see below)
  • 2,400.0 MHz to 2,485.0 MHz Operation of radio-controlled aircraft and other recreational RC models (Spread Spectrum).

United States

In the United States, the 13 cm band comprises frequencies in two segments stretching from 2.300 to 2.310 GHz, and from 2.390 to 2.450 GHz.[2] (The segment from 2.310 to 2.390 GHz was withdrawn from the amateur service and reallocated to direct satellite radio broadcasting, e.g., Sirius XM Radio.) The segment, 2.390 to 2.417 GHz, is domestically allocated amateur radio on a primary basis, while the remainder of the band is only available on a secondary basis.[1] It is authorized to all amateur radio licensees who hold a Technician or higher class license (US), or a Basic or higher license (Canada). The band is allocated on a shared basis with other services, and U.S. Federal Communications Commission (FCC) Rules specify that amateurs may not cause interference to and must accept interference from other services authorized by other nations, and by radio-location, fixed, and mobile stations (except aeronautical) authorized by the FCC.[3] As in the rest of the world, US stations in the amateur service are not protected from interference caused by industrial, scientific, and medical equipment.

The bandplan published by the American Radio Relay League recommends frequencies based on intended activity in the band.[4]

See also

References

  1. ↑ 1.0 1.1 "FCC Online Table of Frequency Allocations" (PDF). 47 C.F.R. Federal Communications Commission. June 2, 2011. Retrieved August 4, 2011. 
  2. ↑ Title 47, Part 97.301 (Subpart D): Technical Standards. http://www.arrl.org/FandES/field/regulations/news/part97/d-301.html accessed 12 May 2008
  3. ↑ 47 C.F.R. §97.301, §97.303
  4. ↑ http://www.arrl.org/band-plan-1
International amateur radio frequency allocations
Range Band ITU Region 1 ITU Region 2 ITU Region 3
LF 2200 m 135.7 kHz - 137.8 kHz
MF 600 m 472 kHz - 479 kHz
160 m 1.810 MHz - 1.850 MHz 1.800 MHz - 2.000 MHz 1.800 MHz - 2.000 MHz
HF 80 / 75 m 3.500 MHz - 3.800 MHz 3.500 MHz - 4.000 MHz 3.500 MHz - 3.900 MHz
60 m1 5.250 MHz - 5.450 MHz
40 m 7.000 MHz - 7.200 MHz 7.000 MHz - 7.300 MHz 7.000 MHz - 7.200 MHz
30 m2 10.100 MHz - 10.150 MHz
20 m 14.000 MHz - 14.350 MHz
17 m2 18.068 MHz - 18.168 MHz
15 m 21.000 MHz - 21.450 MHz
12 m2 24.890 MHz - 24.990 MHz
10 m 28.000 MHz - 29.700 MHz
VHF 6 m 50.000 MHz - 52.000 MHz1 50.000 MHz - 54.000 MHz 50.000 MHz - 54.000 MHz
4 m1 70.000 MHz - 70.500 MHz
2 m 144.000 MHz - 146.000 MHz 144.000 MHz - 148.000 MHz 144.000 MHz - 148.000 MHz
1.25 m 222.000 MHz - 225.000 MHz
UHF 70 cm 430.000 MHz - 440.000 MHz 420.000 MHz - 450.000 MHz3 420.000 MHz - 450.000 MHz3
33 cm 902.000 MHz - 928.000 MHz
23 cm 1.240 GHz - 1.300 GHz
13 cm 2.300 GHz - 2.450 GHz
SHF 9 cm 3.400 GHz - 3.475 GHz3 3.300 GHz - 3.500 GHz 3.300 GHz - 3.500 GHz
5 cm 5.650 GHz - 5.850 GHz 5.650 GHz - 5.925 GHz 5.650 GHz - 5.850 GHz
3 cm 10.000 GHz - 10.500 GHz
1.2 cm 24.000 GHz - 24.250 GHz
EHF 6 mm 47.000 GHz - 47.200 GHz
4 mm3 75.500 GHz1 - 81.500 GHz 76.000 GHz - 81.500 GHz 76.000 GHz - 81.500 GHz
2.5 mm 122.250 GHz - 123.000 GHz
2 mm 134.000 GHz - 141.000 GHz
1 mm 241.000 GHz - 250.000 GHz
THF Sub-mm Some administrations have authorized spectrum for amateur use in this region.

1 This is not mentioned in the ITU's Table of Frequency Allocations, but individual administrations may make allocations under Article 4.4 of the ITU Radio Regulations. See the appropriate Wiki page for further information.
2 HF allocation created at the 1979 World Administrative Radio Conference. These are commonly called the "WARC bands".
3 This includes a currently active footnote allocation mentioned in the ITU's Table of Frequency Allocations.

See also: Radio spectrum · Electromagnetic spectrum
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