MICROSTRIP DUAL BAND PASS BAND FILTER Russian patent published in 2013 - IPC H01P1/00 

FIELD: electricity.

SUBSTANCE: microstrip dual band pass band filter comprises a dielectric substrate, one side of which is metallised and performs a function of a grounded base, and on the second one parallel rectilinear strip conductors are applied, which are electromagnetically connected microstrip resonators, out of which the input and the output conductor are connected to filter ports. The novelty is the fact that the strip conductor of each resonator is split with a longitudinal slot at one end by not more than a half of its length, and conductors of each adjacent pair of joined resonators are directed to opposite sides and are displaced one relative to the other towards non-split ends by not more than the length of the non-split section.

EFFECT: improved selective properties of a dual-band pass band filter due to the possibility to arrange two pass bands on specified frequencies, including arbitrary close ones.

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