Split-Type Input-Reflectionless Multiband Filters
Split-Type Input-Reflectionless Multiband Filters
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DOI：
10.1109/lmwc.2018.2868091
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发表时间：
2018-09
影响因子：
3
通讯作者：
R. Gómez‐García;José-María Mu𮸭Ferreras;D. Psychogiou
中科院分区：
文献类型：
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作者：
R. Gómez‐García;José-María Mu𮸭Ferreras;D. Psychogiou
本文介绍了具有输入无反射功能的分裂型多带通滤波器和带阻滤波器。在多频带BPF的情况下，它们由一个具有分离型多频带BPF通道（主通道）和其互补的反向端接的多频带BSF通道（辅助通道）的吸收网络组成，该通道吸收整个滤波器未传输的输入信号能量。多频带BSF对应物通过互换主通道和辅助通道的角色从后者获得。的操作基础，理论设计规则，和设计的分裂型输入无反射多频带滤波器的合成实例下的耦合矩阵为基础的配方进行了描述。此外，为了实际验证的目的，两个微带原型对应的3.85-/4.55-GHz的二阶双频带通滤波器和背场滤波器电路的构造和测量。
Split-type multiband bandpass filters (BPFs) and bandstop filters (BSFs) with input-reflectionless capabilities are reported in this letter. In the multiband BPF case, they consist of a duplexing network with a split-type multiband BPF channel—main channel—and its complementary resistively terminated multiband BSF channel—auxiliary channel—that absorbs the input-signal energy that is not transmitted by the overall filter. The multiband BSF counterpart is obtained from the latter by interchanging the roles of the main and auxiliary channels. The operational foundations, theoretical design rules, and synthesis examples of the devised split-type input-reflectionless multiband filters under a coupling-matrix-based formulation are described. Furthermore, for practical validation purposes, two microstrip prototypes corresponding to 3.85-/4.55-GHz second-order dual-band BPF and BSF circuits are constructed and measured.