The invention relates to microwave technology, namely the microwave microstrip bandpass filters are used to filter useful and suppression of spurious signals in microwave devices.; Microwave microstrip bandpass filter is a dielectric substrate on one side of which is applied a metallized grounding the base, and on the other printed microstrip conductors forming hairpin resonators. The resonators are arranged in series and connected to each other. One end of each cavity free, and the other - short-circuited. Input and output of the filter is connected to the first and last resonators. In addition, apply two microstrip conductor. One end of the first conductor is connected to the middle of the first cavity and the second end is free. One end of the second conductor is connected to the middle of the last resonator and the other end is free.; Additional microstrip conductors form a rejector configured to parasitic frequency bandwidth of the third harmonic, which allows surely suppress undesired signals in the pass band of the third harmonic, and thus improve the out of band signal rejection circuit and excluding microwave channel bandstop filter.
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