CERAMIC BANDPASS FILTER BASED ON QUASI-STATIONARY RESONATORS Russian patent published in 2015 - IPC H01P3/00 

FIELD: radio engineering, communication.

SUBSTANCE: ceramic bandpass filter based on quasi-stationary resonators consists of interconnected metal-coated ceramic unit in the form of a rectangular parallelepiped made of thermally stable ceramic material with dielectric permittivity of ε_r1, on which communication elements are formed in the form of sections coplanar lines and low capacitive areas, as well as a circuit of inductors with direct inductive coupling, made in the form of metal-coated openings in the ceramic unit, and communication elements in the form of sections of coplanar lines, and a metal-coated ceramic plate made of thermally stable ceramic material with dielectric permittivity ε_r2>>ε_r1, on a circuit of capacitors is formed in the form of flat capacitors with metal-coated openings, as well as communication elements in the form of upper capacitive areas.

EFFECT: raising the upper stop band of a bandpass filter, designing ceramic filters with small overall dimensions in the centimetre and decimetre wavelength range.

4 dwg