Microcell
As microcells are GSM - or UMTS -Sendeanlagen called low power output, which only have a very small sphere. They are usually installed at consumer focal points such as busy intersections and busy main roads and should relieve the surrounding larger base stations or cover limited supply gaps. Microcells are also used in historic old towns with narrow streets, where a comprehensive coverage via the usual antennas on building roofs cannot be guaranteed. The site or monument protection can also be a criterion for the construction of microcells, as these are equipped with smaller antennas that are inconspicuously attached to building facades, street lighting masts and the like. Ä. Can be mounted. Due to the spatial restrictions, microcells are also used extensively to supply subway lines and train stations.
There are also mobile microcells that can be transported in a vehicle and set up on certain occasions (for example at concerts or football games).
Microcells are also used for cell phone coverage inside buildings, for example in shopping centers, train stations, office buildings, the term picocell is also used here. It uses its own internal antennas, which sometimes have a certain similarity to devices such as fire alarms, etc. The term femtocell has become established for covering very small areas, such as individual rooms .