A Mixed Cross-coupling Microstrip Filter with Multiple Transmission Zeros
A Mixed Cross-coupling Microstrip Filter with Multiple Transmission Zeros
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DOI：
10.1163/156939311797164936
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发表时间：
2011-01
影响因子：
1.3
通讯作者：
X. Ouyang;Q. Chu
中科院分区：
文献类型：
--
作者：
X. Ouyang;Q. Chu
提出了一种具有四个传输零点的新型三极微带滤波器。三分滤波器的输入和输出发夹梳谐振器之间的耦合称为交叉耦合，提供近带传输零。这种交叉耦合元件也是一种混合电磁耦合元件，它在通带之外引入了另一种可调传输零。由于交叉耦合技术和电磁混合耦合方法的结合，可以实现多个传输零点，这意味着高的抑制水平。因此，与内联滤波器相比，需要更少的谐振器来获得相同数量的传输零。实测结果与模拟s参数吻合较好。
A novel three-pole microstrip filter with four transmission zeros is proposed. The coupling between input and output hairpin-comb resonators of the trisection filters, regarded as the cross-coupling, provides a close-to-band transmission zero. This cross-coupling component is also a mixed EM coupling component, which introduces another adjustable transmission zero beyond the passband. Due to the combination of the cross-coupling technique and the mixed electric and magnetic (EM) coupling approach, multiple transmission zeros can be achieved, which means a high rejection level. Therefore, fewer resonators are needed to obtain the same number of transmission zeros than inline filters. The measured result is in good agreement with the simulated S-parameters.