Waveguide-planar band-pass filter contains the first rectangular waveguide, one end of which serves as filter inlet, in E-plane of which in the middle between narrow walls there installed is thin metal plate with holes located on it along axis of the specified waveguide, which serve as filter resonators, and the second rectangular waveguide, one end of which serves as filter outlet, in E-plane which is similarly installed identical to the first plate with holes. Both said waveguides have a common narrow wall made in the form of a thin metal plate, which contains holes of H-shaped and rectangular shapes, which pairwise connect said filter resonators. H-shaped hole connects central resonators of filter. Thin metal plates with holes located on them along the axis of these waveguides, which serve as filter resonators, are extended beyond the central resonators and are continuous, and the space between them is filled with non-reflecting absorbers.
The useful model refers to the wiring circuits of hybrid-integral filters of centimeter and millimeter wavelength ranges. Filters of this type are usually used as part of communication systems, radar systems, etc.
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