Four-mode dual-band filter based on a single rectangular SIW structure
A dual-band filter and filter technology, applied in the field of electronic information, can solve problems such as no source negative coupling, and achieve the effects of improving stop-band attenuation, low manufacturing process requirements, and high frequency selectivity
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[0038] The present invention will be further described below in conjunction with accompanying drawing.
[0039] Such as figure 1As shown in (b), the filter is composed of a single-layer Rogers5880 dielectric plate with a thickness of h, and the upper and lower surfaces of the dielectric plate are covered with metal layers; from figure 1 As can be seen in (a), the filter structure consists of only a single rectangular SIW cavity, in figure 1 There are two types of metal vias in (a), one is a plurality of first metal pillars forming the electric wall of the resonant cavity, and the other is a plurality of second and third metal pillars forming a disturbance metal via. The introduced perturbation metal vias are for rationally utilizing the first four modes of a single rectangular SIW cavity, therefore, perturbation metal vias play a key role in the design of the filter of the present invention.
[0040] The "cross-shaped" second metal pillar is located in the center of the rect...
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