MICROSTRIP BANDPASS FILTER BASED ON TWO-MODE RING RESONATORS Russian patent published in 2023 - IPC H01P1/203 

FIELD: microwave technology.

SUBSTANCE: invention is intended for filtering signals. The microstrip bandpass filter based on two-mode ring resonators contains a tubular dielectric substrate, the outer surface of which is completely metallized and is a grounded base. On the inner surface of the tubular substrate, parallel to each other, there are strip metal conductors of the resonators, which have the shape of a ring. The resonators have jumps in the width of the annular strip conductor in form of rectangular protrusions, by changing the dimensions of which the required shape of the filter type is achieved. External transmission lines 4 with a characteristic impedance of 50 ohms are connected to the ring conductors through lumped capacitance.

EFFECT: increase of selectivity and reduction of introduced losses in the passband of the filter.

1 cl, 2 dwg