FIELD: radio electronics; intermediate-frequency channels of radio receivers.
SUBSTANCE: proposed band filter has inductance coils 1, 5, piezoelectric resonators 2, 6, and capacitors 3, 4, 9 - 13. In order to obtain wider passbands, respective piezoelectric resonators are connected in parallel with capacitors 4 and 8. For higher-order narrow-band filters ladder section of series-connected piezoelectric resonators and capacitors connected to their leads and to common bus are inserted between piezoelectric resonators 2 and 6.
EFFECT: reduced deformation of filter frequency response.
3 cl, 4 dwg
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