DEVICE AND METHOD OF CASCADE CONNECTION OF FILTERS OF DIFFERENT MATERIALS Russian patent published in 2014 - IPC H03H9/64 

FIELD: process engineering.

SUBSTANCE: invention relates to cascade connection of several filters. Filter comprises at least one first filter composed by band-rejection filter with the first set of parameters defined by the first material used for its fabrication. Second filter features second set of parameters defined by the second material of its fabrication. Every said filter is the band-rejection filter of band-transmission filter. Filters are interconnected to make composite filter. First and second materials differ. Composite filter has third set of parameters depending on said first and second materials.

EFFECT: wide transmission or rejection bands with one narrow band on one of said transmission or rejection band.

19 cl, 11 dwg