MICROVAWE LOW-PASS FILTER Russian patent published in 2018 - IPC H01P1/20 

FIELD: radio engineering and communications.

SUBSTANCE: invention relates to the field of radio engineering, in particular to low-pass filters. Microwave low-pass filter contains segments of the transmission line connected in series, in the middle of which open loops are connected, the filter input is connected to the beginning of the first segment, and the filter output is connected to the end of the last segment. In addition, the filter includes capacitors connecting the beginning and end of each segment, the capacitance of the capacitors is in the range of 1/ωZ₀ up to 1.5/ω₀Z₀, where ω₀ – circular boundary frequency, Z₀ – input and output resistance and wave resistance of line segments. Conductors of line segments and open loop conductors are parallel to each other, the conductors of the open loop are located between the conductors of line segments, and the capacitors are connected as jumpers between the input and output above the open loop.

EFFECT: increased selectivity of the filter and lowered size.

1 cl, 2 dwg