源与负载感性交叉耦合的小型介质滤波器
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国家自然科学基金资助项目(61661023);江西省教育厅科研基金资助项目(GJJ151560);江西省自然科学基金资助项目(20151BAB207014)

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Compact Dielectric Filters With Inductive CrossCoupling Between Load and Source
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    摘要:

    为了提高滤波器的阻带衰减,研究了源与负载感性交叉耦合的小型介质滤波器。首次提出一种新概念:将源和负载看作准谐振器。以贴片电感作为源与负载之间、源与第二个谐振器之间的交叉耦合元件,两个准谐振器和两个介质谐振器可构成级联四节(CQ),一个准谐振器和两个介质谐振器可构成级联三节(CT)。分析了传输零点的位置,详细讨论了这种滤波器结构的设计方法。采用介电常数为80的介质陶瓷组装了3个两级介质滤波器,并进行测试,结果表明传输零点的个数和位置与仿真设计相符合。滤波器的体积小,均为14 mm×6.5 mm×10 mm。

    Abstract:

    In order to improve the stopband attenuation of the filter, a compact dielectric filter with inductive crosscoupling between the load and the source has been developed.A new concept that the source and the load can be regarded as pseudoresonator is proposed for the first time. An inductor is used as the crosscoupling element between the source and the load or the source and the second resonator.Two pseudoresonators together with two dielectric resonators can form a cascaded quadruplet (CQ),two dielectric resonators together with a pseudoresonator can form a cascaded triplet (CT).The locations of the transmission zeros are analyzed and the design of the proposed filters are discussed in details. Three secondorder filters made of dielectric ceramics with dielectric constant of 80 are fabricated and measured.The results show the measured numbers and positions of transmission zeros have a good agreement with the simulation. The fabricated filters have compact volumes of 14 mm×6.5 mm×10 mm.

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曹良足,高瑞平,殷丽霞.源与负载感性交叉耦合的小型介质滤波器[J].压电与声光,2018,40(4):496-499. CAO Liangzu, GAO Ruiping, YIN Lixia. Compact Dielectric Filters With Inductive CrossCoupling Between Load and Source[J]. PIEZOELECTRICS AND ACOUSTOOPTICS

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  • 在线发布日期: 2018-08-13
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