L band
Frequency range | 1 – 2 GHz |
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Wavelength range | 30 – 15 cm |
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The L band is the
Applications
Mobile service
In Europe, the Electronic Communications Committee (ECC) of the
In the Americas, mobile services are operated between the 1.7 GHz to 2.1 GHz range in the
The Global Positioning System carriers are in the L band, centered at 1176.45 MHz (L5), 1227.60 MHz (L2), 1381.05 MHz (L3), and 1575.42 MHz (L1) frequencies. L band waves are used for GPS units because they are able to penetrate clouds, fog, rain, storms, and vegetation. Only dense environments such as heavy forest canopies or concrete buildings can cause GPS units to receive data inaccurately.[2]
The
Telecommunications use
Mobile phones operate at 600–900 and 1700–2100 MHz.
Aircraft surveillance
The aircraft L-band ranges from 960–1215 MHz. Aircraft can use
Amateur radio
The Radio Regulations of the
Digital audio broadcasting
In the United States and overseas territories, the L band is held by the military for telemetry, thereby forcing digital radio to in-band on-channel (IBOC) solutions. Digital Audio Broadcasting (DAB) in Europe primarily uses Band III, but was historically also allowed to be carried in the 1452–1492 MHz range in some countries.
Digital video broadcasting
DVB-H, DVB-SH, and DVB-T2 can operate in the L band.
Digital multimedia broadcasting
Astronomy
The band contains the hyperfine transition of neutral hydrogen (the hydrogen line, 1420 MHz), which is of great astronomical interest as a means of imaging the normally invisible neutral atomic hydrogen in interstellar space. The band also contains hydroxyl radical transition lines at 1665 and 1667 MHz. Consequently, parts of the L band are protected radio astronomy allocations worldwide.[5] Specifically, the 1400–1427 MHz and 1660.6–1670.0 MHz regions are protected.[6]
References
- ^ "Harmonised use of the band 1452–1492 MHz for MFCN SDL" (PDF). CEPT ECC. 2015-07-03. Archived from the original (PDF) on 2015-07-21. Retrieved 2015-07-17.
- ISBN 978-0-7844-1150-6.
- hdl:11577/3269537.
- ^ http://www.fcc.gov/Bureaus/International/Orders/1995/da950131.txt [bare URL plain text file]
- ^ "Radio Spectrum Allocation". Federal Communications Commission. 2011-03-02. Retrieved 2023-02-09.
- ^ "RA.314:Preferred frequency bands for radio astronomical measurements". www.itu.int.