4-millimeter band
The 4 millimeter band is a portion of the EHF (microwave) radio spectrum internationally allocated to amateur radio and amateur satellite use. The amateur radio and amateur satellite band is between 76.0 GHz and 81.0 GHz. Amateurs operate on a primary basis between 77.5 GHz and 78.0 GHz and on a secondary basis in the rest of the band. Also, 81.0 GHz to 81.5 GHz is allocated by ITU footnote 5.561A to the amateur and amateur-satellite services on a secondary basis. The ITU's allocations are the same in all three ITU regions.[1]
Until 2006, 75.5 GHz to 76.0 GHz was also allocated by the ITU to amateurs on a primary basis. In response to this change, CEPT added footnote EU35 to the "European Common Allocation Table", which provides a continued allocation of this segment to European amateurs.[2]
Frequencies of note
- 75,500 MHz Old Narrowband Calling Frequency, still in use in some countries.
- 75,976 & 76,032 MHz Narrowband activity centres - esp in Region-1
See also
Amateur radio frequency allocations
References
- ↑ "FCC Online Table of Frequency Allocations" (PDF). 47 C.F.R. Federal Communications Commission. June 2, 2011. Retrieved August 4, 2011.
- ↑ Blondeel Timmerman, Hans (15 March 2009). "75.5-81.5 GHz". International Amateur Radio Union Region 1 Homepage. International Amateur Radio Union Region 1. Retrieved August 4, 2011.
EU35: The band 75.5-76 GHz is in Europe also allocated to the Amateur and Amateur Satellite services
| 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 | ||
| 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 | |
| 4 m1 | 70.000 MHz - 70.500 MHz | |||
| 2 m | 144.000 MHz - 146.000 MHz | 144.000 MHz - 148.000 MHz | ||
| 1.25 m | 220.000 MHz - 225.000 MHz | |||
| UHF | 70 cm | 430.000 MHz - 440.000 MHz | 430.000 - 440.000 MHz (420.000 - 450.000 MHz)3 | |
| 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 | |
| 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 | ||
| 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 | ||||