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.
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.
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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).
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. (The segment from 2.310 to 2.390 GHz was withdrawn from the amateur service and reallocated to direct satellite radio broadcasting, e.g., Sirius XM Radio.)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. 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. 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.
- "FCC Online Table of Frequency Allocations" (PDF). 47 C.F.R. Federal Communications Commission. June 2, 2011. Retrieved August 4, 2011.
- 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
- 47 C.F.R. §97.301, §97.303
|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.
|See also: Radio spectrum · Electromagnetic spectrum|