MULTICHANNEL FILTRATION UNIT Russian patent published in 2014 - IPC H03H7/46 

FIELD: process engineering.

SUBSTANCE: invention relates to radio electronics and can be used as a preselector stage. Proposed unit comprises differential transformer. Primary of the latter has two output terminals. Differential secondary has tree output terminals. First group of N band filters is connected to first output of differential winding. Second group of N band filters is connected to third output of differential winding. Outputs of band filter of first and second groups make the outputs of filtration unit. Note here that first and second capacitors are connected to first output of transformer primary. Second output of first capacitor is connected to input potential terminal of filtration union. Second outputs of second capacitor and primary are integrated with common bus. Second output of differential winding is connected to third capacitor with its second output connected to common bus.

EFFECT: decreased working attenuation in preselector bandwidth.

1 dwg