The single LNB's job is to filter, amplify and output required frequencies in order to manage and overcome certain line, or other induced, signal losses. There are two sub-components inside a unit: a low-noise input stage and a block converter. This two stage configuration manages and filters frequencies within a gross spectrum range to create a stable, and ultimate range of final frequencies, based on the needs of the particular communications system.
The dual LNB produces two discrete output signals, rather than a single output as described by the single LNB. In this case, the input stage for the unit is common, however, the converter stage joins with a signal splitter that produces multiple signals from the common input.
Linear LNBs are small-footprint units, size-optimized for small parabola, such as home satellite dishes in the 1 m (2.2 foot) diameter range. These units operate on the same engineering principles, components and frequencies as industrial single LNBs. The only difference in this case, is the physical size of the unit.