一种共面波导结构双模方形贴片带通滤波器

提出一种新型共面波导(CPW)结构双模方形贴片带通滤波器。该滤波器采用方形贴片作为谐振器,在方形贴片的两个对称的角上开两个相同的方形切角作为微扰使其简并模式分离并产生耦合,贴片与输入/输出CPW分别设计在介质基板的两个不同的面上。文中给出了该滤波器的结构以及通过仿真和实验获得的性能参数,结果表明该滤波器的通带带宽可在4.9%到7.4%的范围内调节,通带内的最小插入损耗为1.85dB。

A CPW Bandpass Filter Using a Dual-mode Square Patch Resonator

A novel coplanar waveguide(CPW) bandpass filter using a dual-mode square patch resonator is presented in this paper.In the filter,a conventional square patch is used as the resonator,and two small identical square patches cuts at its symmetrical corners are used as perturbation elements to split its degenerate modes and to introduce a coupling between them.The square-patch and the input/output CPW are constructed on the opposite sides of a dielectric substrate,respectively.The configuration and the performance of the filter obtained in both simulation and experiment are presented.Results show that the pass-band of the filter may be adjusted over the bandwidth range from 4.9% to 7.4%,and it has a minimum insertion loss of 1.85 dB in its passband.