Design of Symmetric Trisection Filters for Compact Low-Temperature Co-Fired Ceramic Realization
Design of Symmetric Trisection Filters for Compact Low-Temperature Co-Fired Ceramic Realization
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DOI：
10.1109/tmtt.2009.2035870
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发表时间：
2010
影响因子：
4.3
通讯作者：
M. Hoft;T. Shimamura
中科院分区：
文献类型：
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作者：
M. Hoft;T. Shimamura
本文讨论了交叉耦合分段对称带通滤波器的设计。分析和综合是通过集总元件等效电路的众所周知的矩阵运算来完成的。导纳矩阵的电纳被分成两个单独的矩阵，分别用于电容和电感贡献，这使我们可以更深入地了解矩阵的操作。重点设计了在通带下侧有两个传输零点的三极点带通滤波器。推导出对称拓扑的新颖解，它既有谐振主耦合，也有共振交叉耦合。采用低温共烧陶瓷工艺实现了2450 MHz的无线局域网络滤波器，验证了这种新型拓扑结构的潜力。实验结果与计算结果吻合较好。
In this paper, the design of symmetric bandpass filters with cross-coupled trisections is discussed. The analysis and synthesis is done by well-known matrix manipulation of the lumped element equivalent circuit. The susceptance of the admittance matrix is split up into two separate matrices for capacitive and inductive contributions, which gives more insight into the manipulation of the matrix. Emphasis is put on design of a three-pole bandpass filter with two transmission zeros at the lower side of the passband. Novel solutions for the symmetric topology are derived, having either resonant main coupling or resonant cross-coupling. The potential of the novel topology is demonstrated by a compact realization of a wireless local area network filter at 2450 MHz in low-temperature co-fired ceramic technology. Good agreement between measured and computed results is obtained.