“23-centimeter band”的意思、由来-开放百科全书

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23-centimeter band

释义

History
List of notable frequencies
Region 1 Region 2 Region 3
See also
References

The 23 centimeter, 1200 MHz or 1.2 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 1240 MHz and 1300 MHz. The amateur satellite band is between 1260 MHz and 1270 MHz, and its use by satellite operations is only for up-links on a non-interference basis to other radio users (ITU footnote 5.282). The allocations are the same in all three ITU regions.

In the United Kingdom the band is between 1240 MHz and 1325 MHz.^[2]

Most modes of communication used in amateur radio can be found in the 23 cm band. Some of the more common modes include voice, data, EME (moonbounce), as well as ATV.^[1]

History

{{Expand section|1=

Origin
Loss of 1215-1240 MHz to GPS
- Replacement with 900 MHz
- WARC 1979
Sharing with Galileo

|date=January 2012}}

List of notable frequencies

Frequencies in the 23 cm band are harmonized by International Telecommunication Union region.

Region 1

CW and SSB calling frequency is 1296.2 MHz.^[4]
FM simplex calling frequency is 1297.5 MHz.^[4]

Region 2

CW and SSB calling frequency is 1296.1 MHz.^[6]
FM simplex calling frequency is 1294.5 MHz.^[6]

Region 3

FM Simplex Calling Frequency is 1294.0 MHz (VK Australian band-plan 2007)

In 2008 the IARU Region-1 Cavtat Conference designated 1240.000-1240.750 MHz as an alternative centre for narrowband activity and beacons. This is a mitigation for sharing with existing aviation radars and Primary users, or for potential

issues with the European Galileo system.

References

1. ^American Radio Relay League's Band Plan for 23cm
2. ^¹{{cite web|url = http://www.rsgb.org/committees/spectrumforum/docs/rsgb_band_plan_2012_files/sheet016.htm|title = RSGB Band Plan|publisher = Radio Society of Great Britain|work = Radio Society of Great Britain|date = 1 January 2012|accessdate = February 11, 2012}}
3. ^¹²{{cite web |url=http://www.iaru-r2.org/documents/explorer/files/Plan%20de%20bandas%20%7C%20Band-plan/R2%20Band%20Plan%202016.pdf |title=IARU Region 2 Band Plan |publisher=International Amateur Radio Union Region 2 |format=PDF |pages=11-12 |date=October 14, 2016 |accessdate=}}
4. ^¹²{{cite web|url = http://www.iaru-r1.org/index.php/documents/func-download/580/chk,f9e4e4a0053473343dfd0d809805d442/no_html,1/|title = VHF Managers Handbook|version = 7|publisher = International Amateur Radio Union Region 1|format = PDF|pages = 45-46|date = January 2015|accessdate = October 27, 2015}}

^[2]^[3]^[4]
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1 : Amateur radio bands

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