An EM-Coupled Triangular Open-Loop Filter With Transmission Zeros Very Close to Passband
An EM-Coupled Triangular Open-Loop Filter With Transmission Zeros Very Close to Passband
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DOI：
10.1109/lmwc.2008.2011309
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发表时间：
2009-02
影响因子：
3
通讯作者：
Huan Wang;Q. Chu
中科院分区：
文献类型：
--
作者：
Huan Wang;Q. Chu
本文提出了一种新型带背孔径的电磁混合耦合三角形谐振器滤波器。构建了强而可控的电磁耦合，实现了非常接近通带的传输零点。仿真和测量结果表明，该滤波器具有低插入损耗、高抑制电平和非对称特性。制作的三极直列滤波器可以实现超过6%的带宽，而第一和第二谐振器之间的EM混合耦合同时产生非常近波段的传输零。
This letter presents a novel EM mixed coupled triangular resonator filter with a backed aperture. Strong and controllable electric and magnetic coupling is constructed to realize transmission zeros very close to passband. Simulation and measurement results show good performances of the proposed filter such as low insertion loss, high rejection levels, as well as asymmetric characteristics. The fabricated three-pole inline filter can implement a bandwidth exceeding 6% while a very close-to-band transmission zero is simultaneously produced by the EM mixed coupling between the first and second resonators.