L-band – Definition and Pronunciation
What is L-band?
L-band is an Intermediate Frequency (IF) typically employed at an earth station to route traffic between various points over coaxial/waveguide facilities. The frequency range coves the 950–1 450 MHz spectrum. Note that over-the-air L-band ranges are (slightly) different and are defined by various regulatory agencies. Satellite signals (at C-band and Ku-band frequencies) are converted down to L-band in the focal point of many dish antennas by the Low Noise Block Downconverter (LNB) for further distribution within the electronics subsystem or the earth station. At C-band the downconversion is typically as follows: 4 200 to 950 MHz; 4 180 to 970 MHz; 4 160 to 990 MHz, and so on to 3 700 to 1 450 MHz. At the Ku-band, the downconversion is typically as follows: 11 700 to 950 MHz; 11 720 to 970 MHz; 11 740 to 990 MHz, and so on to 12 200 to 1 450 MHz. The upconverter handles the opposite function.
Examples of L-band
Until recently, in-flight connectivity by satellite has been largely provided over traditional L-band and Ku-band, and has generally supported only low-bandwidth sessions (another common way that IFC has been supported over the years is via air-to-ground (ATG) mechanisms – but still at low bandwidth).
From “Aeronautical Mobility Services”.
This EPIRB uses the 1,6 GHz or L-Band for transmission of distress signals via Inmarsat geostationary satellites. The system was tested in 1982-83, and in 1987. The tests resulted in the decision to produce a “float free” satellite EPIRB for this band.
From “The Essential Guide to Emergency Radio Beacons”.
An LNA is generally more precise and stable but more expensive than an LNB. The LNB amplifies the RF signal from the antenna and converts it to an L-band signal.
From “Exploring the Future of Satellites”.
Pronunciation of L-band
