FIELD: radio equipment.
SUBSTANCE: invention relates to radio engineering and can be used for frequency selection of signals in receiving and transmitting devices. For this purpose, in the band-pass filter, each link is additionally equipped with an output inductance coil (LDi), by one terminal connected to link output, and by the other to common bus, wherein output inductance coil of previous link is input for next link, besides, between input of first link and common bus is connected input inductance coil (LD1).
EFFECT: technical result is possibility of controlling bandwidth and selectivity of filter by changing coupling coefficient between links by changing inductance value of additionally introduced inductance coils.
1 cl, 5 dwg
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