3-centimeter band

The 3-centimeter or 10 GHz band is a portion of the SHF (microwave) radio spectrum internationally allocated to amateur radio and amateur satellite use on a secondary basis. The amateur radio band is between 10.00 GHz and 10.50 GHz, and the amateur satellite band is between 10.45 GHz and 10.50 GHz. The allocations are the same in all three ITU regions.[1]

List of notable frequencies
ITU regions.
  Region 1
  Region 2
  Region 3
  • 10.3681 GHz Region 2 narrow band calling frequency[2][3]
  • 10.3682 GHz Region 1 narrow band calling frequency[4]
  • 10.3683 to 10.3684 GHz Region 2 propagation beacons[2][3]
  • 10.36875 to 10.36899 GHz Region 1 propagation beacons[4]

Wideband FM Channels

Common Wideband FM frequencies used with gunnplexers.
Operation is in full-duplex with a 30 or 90 MHz split:

  • 10.220 GHz
  • 10.250 GHz †
  • 10.280 GHz †
  • 10.310 GHz
  • 10.340 GHz
  • 10.370 GHz ‡
  • 10.400 GHz
  • 10.430 GHz

† Most commonly used frequency pair for gunnplexers in North America. (10.200 to 10.300 GHz is reserved for gunnplexers in the ARRL Band Plan.[3])

‡ Should only be used if interference is not caused to narrow-band stations.

See also

References
  1. "FCC Online Table of Frequency Allocations" (PDF). 47 C.F.R. Federal Communications Commission. August 13, 2015. Retrieved October 27, 2015.
  2. "IARU Region 2 Band Plan" (PDF). International Amateur Radio Union Region 2. October 14, 2016. p. 13.
  3. "Band Plan". American Radio Relay League. Retrieved February 18, 2015.
  4. "VHF Managers Handbook". 7. International Amateur Radio Union Region 1. January 2015. p. 50. Archived from the original (PDF) on June 17, 2018. Retrieved October 27, 2015.
International amateur radio frequency allocations
Range Band ITU Region 1 ITU Region 2 ITU Region 3
LF 2200 m 135.7–137.8 kHz
MF 630 m 472–479 kHz
160 m 1.810–1.850 MHz 1.800–2.000 MHz
HF 80 / 75 m 3.500–3.800 MHz 3.500–4.000 MHz 3.500–3.900 MHz
60 m 5.3515–5.3665 MHz
40 m 7.000–7.200 MHz 7.000–7.300 MHz 7.000–7.200 MHz
30 m[w] 10.100–10.150 MHz
20 m 14.000–14.350 MHz
17 m[w] 18.068–18.168 MHz
15 m 21.000–21.450 MHz
12 m[w] 24.890–24.990 MHz
10 m 28.000–29.700 MHz
VHF 6 m 50.000–52.000 MHz
(50.000–54.000 MHz)[y]		 50.000–54.000 MHz
4 m[x] 70.000–70.500 MHz N/A
2 m 144.000–146.000 MHz 144.000–148.000 MHz
1.25 m N/A 220.000–225.000 MHz N/A
UHF 70 cm 430.000–440.000 MHz 430.000–440.000 MHz
(420.000–450.000 MHz)[y]
33 cm N/A 902.000–928.000 MHz N/A
23 cm 1.240–1.300 GHz
13 cm 2.300–2.450 GHz
SHF 9 cm 3.400–3.475 GHz[y] 3.300–3.500 GHz
5 cm 5.650–5.850 GHz 5.650–5.925 GHz 5.650–5.850 GHz
3 cm 10.000–10.500 GHz
1.2 cm 24.000–24.250 GHz
EHF 6 mm 47.000–47.200 GHz
4 mm[y] 75.500 GHz[x] – 81.500 GHz 76.000–81.500 GHz
2.5 mm 122.250–123.000 GHz
2 mm 134.000–141.000 GHz
1 mm 241.000–250.000 GHz
THF Sub-mm Some administrations have authorized spectrum for amateur use in this region;
others have declined to regulate frequencies above 300 GHz, leaving them available by default.

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

See also: Radio spectrum, Electromagnetic spectrum
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