一种过孔和枝节加载的带通滤波器设计

Design of Via and Stub Resonator Loaded Band-pass Filter

为实现射频电路小型化,提出采用具有通带特性的过孔为主体结构、加载开路枝节以及短路枝节谐振器的设计方法,实现一种新型带通滤波器。在仿真优化的基础上进行实物加工测试,实物体积为40 mm×20 mm×0.9 mm,实测结果表明,该滤波器的工作频带为1.36~2.83 GHz,相对带宽70.2%,通带内插入损耗小于1.5 d B,带内回波损耗小于-15 d B,带外最大抑制小于-40 d B,实测结果和仿真结果吻合良好。

In order to meet the characterization of circuit miniaturization, the design method was proposed on via sub- ject structure loaded with open and short stub resonator object structure, of which the new band-pass filter is now available. After the simulation and optimization, the physical processing test was carried out, and the volume size of the filter is 40 mm ×20 min×0.9 mm, and the operating frequency can reach the range of 1.36 - 2.83 GHz, relative bandwidth is 70.2%, the insertion loss in band is less than 1.5dB, the return loss is better than -15dB, the maximum suppression outside the band is better than -40dB. The measured values are in good agreement with the simulated values.