An LNB is a downconverter, and this one is used for some Irish satellite TV services. The scale of everything matters when your wavelength is only 15 mm. The PCB is small and neatly laid out.

Lots of stuff, including modifying it for use with the QO-100 geosynchronous satellite (German link). That’s what [Sebastian Westerhold] and [Celin Matlinski] did with a commodity LNB ...

This allows satellite dishes to stay fixed in one direction to capture signals efficiently. The dishes are parabolic and have an LNB that catches signals. These are sent to decoders—either ...