BANDPASS FILTER Russian patent published in 2005 - IPC

FIELD: microwave engineering; bandpass filters built around microstrip resonators.

SUBSTANCE: proposed bandpass filter has n sections of long strip conductors of first group, where n equals number of filter sections disposed on one of dielectric plate surfaces with insulating gaps in-between. Metallized layer is disposed on dielectric plate surface, one end of each section of first-group long strip conductors being connected to metallization layer. Input and output sections of strip conductors are disposed on one of dielectric plate surfaces; s sections of second-group long strip conductors are disposed on one of dielectric strip surfaces in insulating gaps between adjacent sections of first-group long strip conductors, both ends of each section of second-group strip conductor being connected to metallization layer. Metallization layer section is disposed on dielectric plate surface opposing that carrying first-group conductors. Metallization layer section is made in the form of elongated area l₁ with l_p ≥ l₁ ≥ w , where w is second-group strip conductor section width and l_p is length of dielectric plate in direction perpendicular to sections of first-group strip conductor and disposed on dielectric plate surface carrying first-group conductors. Upon connection of second ends of input and output strip conductor sections into propagating microwave circuit sections of input and output strip conductors function to ensure effective energy input and output in filter-transmission-line system.

EFFECT: reduced size of filter.

11 cl, 10 dwg