Synthesis and design of asymmetrical dual-band bandpass filters based on equivalent network simplification
Synthesis and design of asymmetrical dual-band bandpass filters based on equivalent network simplification
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DOI：
10.1109/tmtt.2006.877037
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发表时间：
2006-07
影响因子：
4.3
通讯作者：
Philippe Lenoir;S. Bila;F. Seyfert;D. Baillargeat;S. Verdeyme
中科院分区：
文献类型：
--
作者：
Philippe Lenoir;S. Bila;F. Seyfert;D. Baillargeat;S. Verdeyme
虽然对称双频带通滤波器的合成已经被研究过，但对一般的非对称情况却知之甚少。本文提出了一种利用同轴双模腔实现一般非对称双频带通滤波器的综合方法。内联架构以及响应的非对称性自然会导致选择扩展箱式拓扑或后者的泛化。最近的研究表明，这些拓扑结构具有多个解决方案的属性，这意味着相关的耦合矩阵合成问题承认几个解决方案。一方面，这种多样性为设计人员提供了一些灵活性，但另一方面，使用多个解决方案可能会导致调优过程中的模糊性。我们的过程采取了两全其美：使用列表的等效耦合矩阵，简化的原始拓扑结构可以通过取消某些特定的耦合。选择取消耦合的位置，以便保持电响应并提供一些硬件简化。它还表明，由此产生的简化拓扑不再具有多解属性，因此解决歧义问题。该程序是详细的，并证明了两个例子。
Although the synthesis of symmetrical dual-band bandpass filters has been studied, little seems to be known about the general asymmetrical case. In this paper, a procedure for the synthesis of general asymmetrical dual-band bandpass filters implemented with inline dual-mode cavities is proposed. The inline architecture, as well as the asymmetrical nature of the response, lead naturally to the choice of an extended box topology or generalizations of the latter. It was recently shown that these topologies possess the property of multiple solutions, meaning that the related coupling matrix synthesis problem admits several solutions. On one hand, this multiplicity offers some flexibility to the designer, but on the other hand, working with multiple solutions may lead to ambiguities during the tuning process. Our procedure takes the best of both worlds: using the list of equivalent coupling matrices, simplifications of the original topology can be obtained by canceling some particular couplings. The locations of cancelled couplings are chosen so as to preserve the electrical response and to provide some hardware simplifications. It is also shown that the resulting simplified topology no longer has the multiple solution property, therefore solving ambiguity problems. The procedure is detailed and demonstrated on two examples.