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20-meter band

From Wikipedia, the free encyclopedia
Amateur radio frequency band
AHB9XBG-vertical-Antenna for the 20m-Band onSimplon Pass with view to MountGalehorn.

The20-meter or14-MHzamateur radio band is a portion of theshortwave 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—duringcontests.[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 the40-meter band or the80-meter band) and its good potential for daytime DX operation even in unfavorablepropagation conditions.[3]

History

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This sectionneeds expansion. You can help byadding to it.(January 2011)

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] inWashington, 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 ofAtlantic City, New Jersey 1947.[6]

Band plans

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IARU Region 1

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Europe, Africa, Middle East and Northern Asia[7]

20 meters14000–1407014070–1409914099–1410114101–14350
IARU Region 1

IARU Region 2

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The Americas[7]

20 meters14000–1407014070–1409914099–1410114101–14350
IARU Region 2

IARU Region 3

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Asia-Pacific[7]

20 meters14000–1407014070–1409914099–1410114101–1411214112–14350
IARU Region 3

United States

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Effective 12:01 a.m. EST, February 23, 2007

20 meters14000–14350
 United States14000–1402514025–1415014150–1417514175–1422514225–14350
General
Advanced
Extra

Canada

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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 class14.000–14.07014.070–14.09514.095–14.099514.0995–14.100514.1005–14.11214.112–14.350
Basic(+), Advanced


Japan

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Changed on September 25, 2023.

License class14000–1407014070–1410014100–14350
1st and 2ndnarrow-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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  1. ^"Frequency Allocations". Arrl.org. 5 March 2012.Archived from the original on 14 March 2010. Retrieved29 October 2012.
  2. ^Ford, Steve (ed.). "Picking a band".The ARRL Operating Manual (8th ed.). Newington, CT:American Radio Relay League. p. 1-15.
  3. ^"Propagation of RF Signals".The ARRL Handbook For Radio Communications (82nd ed.). Newington, CT:American Radio Relay League. 2005. p. 20.4.ISBN 0-87259-928-0.
  4. ^"Frequency or wave band allocations".Recommendations for Regulation of Radio Adopted by the Third National Radio Conference. Govt. Print. Off. October 6–10, 1924. p. 15.
  5. ^"INTERNATIONAL RADIOTELEGRAPH CONVENTION AND GENERAL AND SUPPLEMENTARY REGULATIONS"(PDF). INTERNATIONAL RADIOTELEGRAPH CONVENTION OF WASHINGTON, 1927. 25 November 1927. Archived fromthe original(PDF) on 8 March 2014. Retrieved6 July 2014.
  6. ^"RADIO REGULATIONS ANNEXED TO THE INTERNATIONAL TELECOMMUNICATION CONVENTION (ATLANTIC CITY, 1947)"(PDF). Archived fromthe original(PDF) on 15 July 2014. Retrieved6 July 2014.
  7. ^abc"IARU Regions".www.iaru.org. International Amateur Radio Union (IARU). Archived fromthe original on 30 December 2013. Retrieved6 January 2014.
  8. ^"RAC MF/HF Band Plan"(PDF).rac.ca. Archived fromthe original(PDF) on 27 November 2010. Retrieved8 July 2008.
RangeBandITU Region 1ITU Region 2ITU Region 3
LF2200 m135.7–137.8 kHz
MF630 m472–479 kHz
160 m1.810–1.850 MHz1.800–2.000 MHz
HF80 / 75 m3.500–3.800 MHz3.500–4.000 MHz3.500–3.900 MHz
60 m5.3515–5.3665 MHz
40 m7.000–7.200 MHz7.000–7.300 MHz7.000–7.200 MHz
30 m[t2]10.100–10.150 MHz
20 m14.000–14.350 MHz
17 m[t2]18.068–18.168 MHz
15 m21.000–21.450 MHz
12 m[t2]24.890–24.990 MHz
10 m28.000–29.700 MHz
VHF8 m[t3]40.000–40.700 MHz—
6 m50.000–52.000 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 m144.000–146.000 MHz144.000–148.000 MHz
1.25 m—220.000–225.000 MHz—
UHF70 cm430.000–440.000 MHz430.000–440.000 MHz
(420.000–450.000 MHz)[t4]
33 cm—902.000–928.000 MHz—
23 cm1.240–1.300 GHz
13 cm2.300–2.450 GHz
SHF9 cm3.400–3.475 GHz[t4]3.300–3.500 GHz
5 cm5.650–5.850 GHz5.650–5.925 GHz5.650–5.850 GHz
3 cm10.000–10.500 GHz
1.2 cm24.000–24.250 GHz
EHF6 mm47.000–47.200 GHz
4 mm[t4]75.500 GHz[t3] – 81.500 GHz76.000–81.500 GHz
2.5 mm122.250–123.000 GHz
2 mm134.000–141.000 GHz
1 mm241.000–250.000 GHz
THFSub-mmSome administrations have authorized spectrum for amateur use in this region;
others have declined to regulate frequencies above 300 GHz.
[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.
[t2]HF allocation created at the 1979World Administrative Radio Conference. These are commonly called the "WARC bands".
[t3]This is not mentioned in theITU'sTable of Frequency Allocations, but many individual administrations have commonly adopted this allocation under"Article 4.4".
[t4]This includes a currently activefootnote allocation mentioned in the ITU'sTable of Frequency Allocations. These allocations may only apply to a group of countries.
See also:Radio spectrum,Electromagnetic spectrum
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