This paper presents a broadband band-pass filter with cross-coupled line structure. The cross-coupled line structure is composed of the parallel coupled lines and an open stub. It can be analyzed by the odd- and even-mode method due to its symmetric structure. There are three transmission poles in the passband and two transmission zeros out of passband. Then, the influence of the impedance parameters on the transmission zeros and transmission poles are analyzed. Then, the physical parameters of the proposed band-pass filter are given. And using HFSS for simulation and optimization, the final insertion loss and return loss of filter are obtained. The simulation and measurement results are in good agreement, which validates the design idea.

中文翻译：

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交叉耦合线结构宽带带通滤波器的设计

本文提出了一种具有交叉耦合线结构的宽带带通滤波器。交叉耦合线结构由平行耦合线和一个开放式短截线组成。由于其对称结构，可以用奇数和偶数模式进行分析。通带中有三个传输极，通带外有两个传输零。然后，分析了阻抗参数对传输零点和传输极点的影响。然后，给出了所提出的带通滤波器的物理参数。并利用HFSS进行仿真和优化，得到最终的滤波器插入损耗和回波损耗。仿真与测量结果吻合良好，验证了设计思路。