ODD HARMONIC NON-REFLECTING BANDPASS FILTER Russian patent published in 2024 - IPC H01P1/203 

FIELD: microwave equipment.

SUBSTANCE: invention relates to microwave equipment, in particular to filters. Non-reflecting bandpass filter of odd harmonics, comprising first and second coupled strip lines, input of the first line is intended for input of non-reflecting band-pass filter of odd harmonics, and the output of the second line is intended for the output of the filter, characterized in that the input of the second strip line is connected to the input of the first frequency-selective circuit, and the output of the first strip line is connected to the input of the second frequency-selective circuit, the outputs of the frequency-selective circuits are connected to a common conductor, first and second frequency-selective circuit are identical, each frequency-selective circuit consists of two in-series connected circuits, first in form of series-connected first inductance and first capacitance forms a series oscillating circuit with resonant frequency f₁, to which a resistor is connected in parallel with resistance equal to input resistance on the input side of the second strip line, the second circuit in the form of the second inductance and the second capacitor connected in parallel forms a parallel oscillatory circuit with resonance frequency f₂.

EFFECT: reduced dimensions of the filter of odd harmonics while providing the function of the filter of odd harmonics, reduced reflection from the input and output of the filter at out-of-band frequencies.

1 cl, 6 dwg