couples an air interface to the inputs of parallel connected radio frequency resonant circuits in order to allow a circuit configuration which has no switches and is of simple construction only one capacitance which forms a low pass filter is provided in the coupling element and splits an antenna signal between the various bands in the process suppressing influences from bands other than that which has been selected the radio frequency input stage can be used for example in three band tv tuners application_number US 36401503 A description referring now to the single figure of the drawing in detail there is shown a three band tv tuner with an antenna ant a coupling element ke connected to the antenna ant and three parallel connected radio frequency resonant circuits hr 1 hr 2 and hr 3 that are connected to the coupling element ke the radio frequency resonant circuits hr 1 hr 2 hr 3 are followed by a respective transistor t 1 t 2 t 3 connected as an amplifier finally the signal that has been amplified in this way is down mixed in a mixer stage m 1 m 2 m 3 from a radio frequency signal to an intermediate frequency signal in detail the coupling element ke has a second bandstop filter l 1 c 1 which is connected to the antenna ant is formed from a capacitance c 1.