Synthesis of Cross-Coupled Triple-Passband Filters Based on Frequency Transformation
Synthesis of Cross-Coupled Triple-Passband Filters Based on Frequency Transformation
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DOI：
10.1109/lmwc.2010.2049829
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发表时间：
2010-06
影响因子：
3
通讯作者：
Hao Di;Bian Wu;X. Lai;C. Liang
中科院分区：
文献类型：
--
作者：
Hao Di;Bian Wu;X. Lai;C. Liang
提出了一种三通带滤波器的综合方法。所提出的方法是基于从归一化频域到实际频域的频率变换。提出了一种由导纳反相器和并联谐振器组成的新型交叉耦合三带通滤波器拓扑。耦合系数和外部品质因子可以解析计算。为了验证理论，设计并制作了一个微带结构的三通带滤波器。理论响应满足设计要求，实测结果与仿真结果吻合较好。
A synthesis method is presented for triple-passband filters. The proposed method is based on a frequency transformation from the normalized frequency domain to the actual frequency domain. A novel triple-passband filter topology with cross coupling is obtained, which consists of admittance inverters and parallel resonators. The coupling coefficients and the external quality factors can be calculated analytically. To validate the theory, a triple-passband filter is designed and fabricated using microstrip structure. The theoretical response meets the specifications very well, and the measured result shows a good agreement with the simulated one.