My watch list
my.chemeurope.com  
Login  

L band



ITU Radio Band Numbers

4 5 6 7 8 9 10 11 12

ITU Radio Band Symbols

VLF LF MF HF VHF UHF SHF EHF

NATO Radio bands

A B C D E F G H I J K L M

IEEE Radar bands

HF VHF UHF L S C X Ku K Ka V W

Additional recommended knowledge

Contents

NATO L band

The NATO L band is defined as the frequency band between 40 and 60 GHz (5–7.5 mm).

IEEE L band

The IEEE L band (20-cm radar long-band) is a portion of the microwave band of the electromagnetic spectrum ranging roughly from 1 to 2 GHz. [1][2] It is used by some communications satellites, and for some terrestrial Eureka 147 digital audio broadcasting (DAB). The amateur radio service also has an allocation between 1240 and 1300 MHz. The L Band refers to the frequency range of 950 MHz to 1450 MHz. It is the result of the downconversion of the received downlink satellite signals (C or Ku) by the LNB (Low Noise Block converter).

Military use

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. DAB is typically done in the 1452–1492-MHz range as in most of the world, but other countries also use VHF and UHF bands.

GNSS

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.

  • The Galileo Navigation System uses the L-band similarly to GPS.
  • The GLONASS System uses the L-band similarly to GPS.

Telecommunications use

GSM mobile phones operate at 800–900 and 1800–1900 MHz. Iridium (satellite) phones use frequencies between 1610 and 1625MHz to communicate with the satellites

Digital Audio Broadcasting (Earth Orbital)

WorldSpace satellite radio broadcasts in the 1467–1492 MHz L sub-band.

DAB L band usage

The following blocks are use for T-DAB (terrestrial) broadcasts:

Block Centre Frequency
LA1452.960 MHz
LB1454.672 MHz
LC1456.384 MHz
LD1458.096 MHz
LE1459.808 MHz
LF1461.520 MHz
LG1463.232 MHz
LH1464.944 MHz
LI1466.656 MHz
LJ1468.368 MHz
LK1470.080 MHz
LL1471.792 MHz
LM1473.504 MHz
LN1475.216 MHz
LO1476.928 MHz
LP1478.640 MHz

The following blocks are use for S-DAB (satellite) broadcasts:

Block Centre Frequency
LQ1480.352 MHz
LR1482.064 MHz
LS1483.776 MHz
LT1485.488 MHz
LU1487.200 MHz
LV1488.912 MHz
LW1490.624 MHz

Note: Canada uses slightly different central frequencies for L-band DAB while in many European countries DAB is limited part of Band III due to television and mobile two way radio using the rest.

Physics issues relating to band use

The band also contains the hyperfine transition of neutral hydrogen (the hydrogen line), which is of great astronomical interest as a means of imaging the normally invisible neutral atomic hydrogen in interstellar space. Consequently parts of the L-band are protected radio astronomy allocations world-wide.

Optical communications L band

L band is also used in optical communications to refer to the wavelength range 1570 nm to 1610 nm.

 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "L_band". A list of authors is available in Wikipedia.
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE