20-meter band
The 20-meter or 14-MHz amateur radio band is a portion of the shortwave radio spectrum, comprising frequencies stretching from 14.000 MHz to 14.350 MHz.[1] The 20-meter band is widely considered among the best for long-distance communication (DXing), and is one of the most popular—and crowded—during contests.[2] Several factors contribute to this, including the band's large size, the relatively small size of antennas tuned to it (especially as compared to antennas for the 40-meter band or the 80-meter band) and its good potential for daytime DX operation even in unfavorable propagation conditions.[3]
History
Script error: No such module "Unsubst". The Third National Radio Conference was responsible for opening up the 20-meter band to amateur radio operators in the US[4] on October 10, 1924. The band was allocated on a worldwide basis by the International Radiotelegraph Conference[5] in Washington, D.C., on October 4, 1927. Its frequency allocation was then 14–14.4 MHz. The allocation was reduced to 14–14.35 MHz by the International Radio Conference of Atlantic City, New Jersey 1947.[6]
Band plans
IARU Region 1
Europe, Africa, Middle East and Northern Asia[7]
| 20 meters | 14000–14070 | 14070–14099 | 14099–14101 | 14101–14350 |
|---|---|---|---|---|
| IARU Region 1 |
IARU Region 2
The Americas[7]
| 20 meters | 14000–14070 | 14070–14099 | 14099–14101 | 14101–14350 |
|---|---|---|---|---|
| IARU Region 2 |
IARU Region 3
Asia-Pacific[7]
| 20 meters | 14000–14070 | 14070–14099 | 14099–14101 | 14101–14112 | 14112–14350 |
|---|---|---|---|---|---|
| IARU Region 3 |
United States
Effective 12:01 a.m. EST, February 23, 2007
| 20 meters | 14000–14350 | ||||
|---|---|---|---|---|---|
| Template:Flagcountry | 14000–14025 | 14025–14150 | 14150–14175 | 14175–14225 | 14225–14350 |
| General | |||||
| Advanced | |||||
| Extra | |||||
Canada
Canada[8] is part of region 2 and as such is subject to the IARU band plan. Radio Amateurs of Canada offers the bandplan below as a recommendation for use by radio amateurs in that country but it does not have the force of law and should only be considered a suggestion or guideline.
| License class | 14.000–14.070 | 14.070–14.095 | 14.095–14.0995 | 14.0995–14.1005 | 14.1005–14.112 | 14.112–14.350 |
|---|---|---|---|---|---|---|
| Basic(+), Advanced |
Japan
Changed on September 25, 2023.
| License class | 14000–14070 | 14070–14100 | 14100–14350 |
|---|---|---|---|
| 1st and 2nd | narrow-band All modes |
Key
| = CW only | |
| = CW, narrow band digital ( <= 500 Hz ) | |
| = CW, narrow band digital ( <= 500 Hz ), wide band digital | |
| = CW, RTTY and data (US: < 1 kHz Bandwidth) | |
| = Beacons | |
| = CW, phone | |
| = CW, narrow band digital ( <= 500 Hz ), phone | |
| = CW, phone and image |
References
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- ↑ a b c Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
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| 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[t2] | 10.100–10.150 MHz | |||
| 20 m | 14.000–14.350 MHz | |||
| 17 m[t2] | 18.068–18.168 MHz | |||
| 15 m | 21.000–21.450 MHz | |||
| 12 m[t2] | 24.890–24.990 MHz | |||
| 10 m | 28.000–29.700 MHz | |||
| VHF | 8 m[t3] | 40.000–40.700 MHz | — | |
| 6 m | 50.000–52.000 MHz (50.000–54.000 MHz)[t4] |
50.000–54.000 MHz | ||
| 5 m[t3] | 58.000–60.100 MHz | — | ||
| 4 m[t3] | 70.000–70.500 MHz | — | ||
| 2 m | 144.000–146.000 MHz | 144.000–148.000 MHz | ||
| 1.25 m | — | 220.000–225.000 MHz | — | |
| UHF | 70 cm | 430.000–440.000 MHz | 430.000–440.000 MHz (420.000–450.000 MHz)[t4] | |
| 33 cm | — | 902.000–928.000 MHz | — | |
| 23 cm | 1.240–1.300 GHz | |||
| 13 cm | 2.300–2.450 GHz | |||
| SHF | 9 cm | 3.400–3.475 GHz[t4] | 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[t4] | 75.500 GHz[t3] – 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. | ||
| Script error: No such module "anchor".[t1] | All allocations are subject to variation by country. For simplicity, only common allocations found internationally are listed. See a band's article for specifics. | |||
| Script error: No such module "anchor".[t2] | HF allocation created at the 1979 World Administrative Radio Conference. These are commonly called the "WARC bands". | |||
| Script error: No such module "anchor".[t3] | This is not mentioned in the ITU's Table of Frequency Allocations, but many individual administrations have commonly adopted this allocation under Script error: No such module "citation/CS1". | |||
| Script error: No such module "anchor".[t4] | 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 | ||||