Double passband differential filter having laminated substrate integration waveguide structure

The invention discloses a double passband differential filter having a laminated substrate integration waveguide structure. The filter includes a medium substrate, an upper surface metal layer, a middle metal layer and a lower surface metal layer. A metallization through hole array penetrating throu...

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Bibliographische Detailangaben
Hauptverfasser: JIANG SHUGE, WANG RUIDONG, WU CUICUI, SHI YANJIA, KANG WEI, ZHOU KAI, LIANG QINQIN
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention discloses a double passband differential filter having a laminated substrate integration waveguide structure. The filter includes a medium substrate, an upper surface metal layer, a middle metal layer and a lower surface metal layer. A metallization through hole array penetrating through the medium substrate is arranged in the medium substrate. Six substrate integration waveguide cavities are defined by the metallization through hole array, the upper surfaced metal layer, the middle metal layer and the lower surface metal layer. The center frequency of the two differential passbands is obtained through adjusting upper layer cavity dimension parameters. At the same time, the middle metal layer is etched with an H-type coupling slot line. Through adjusting the size and the position of the slot line, a demanded coupling index is obtained, so that better frequency response is achieved. According to the invention, a second difference module passband is obtained by utilizing a substrate integration wa