BAND-REJECTION FILTER, TELECOMMUNICATION BASE STATION AND TERMINAL, DUPLEXER AND IMPEDANCE MATCHING METHOD Russian patent published in 2013 - IPC H03H9/64 

FIELD: radio engineering, communication.

SUBSTANCE: radio-frequency band-rejection filter includes an input port, an output port, a plurality of acoustic resonators, an inductor for matching impedances of the plurality of acoustic resonators, an inductor for connection in the band-rejection filter among the plurality of acoustic resonators, such that static capacitance between the input port and the inductor is basically equal to the static capacitance between the output port and the inductor. The plurality of acoustic resonators can be a plurality of parallel resonators, a plurality of series resonators or a combination of both. The radio-frequency band-rejection filter is made using a surface acoustic wave technology, a bulk acoustic wave thin-film resonator technology or a bulk acoustic wave resonator technology.

EFFECT: limiting energy scattering and eliminating noise.

21 cl, 18 dwg