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 dB,带内回波损耗小于-15 dB,带外最大抑制小于-40 dB,实测结果和仿真结果吻合良好。 In order to miniaturize the RF circuit, a new type of band-pass filter is proposed by adopting the design method that the via hole with the pass-band characteristic is the main structure, the open-circuit branch and the short-circuited stub resonator are loaded. The physical machining test was carried out on the basis of simulation optimization. The physical volume was 40 mm × 20 mm × 0.9 mm. The experimental results show that the filter operating frequency band is 1.36 ~ 2.83 GHz, the relative bandwidth is 70.2%, the insertion loss in the passband is less than 1.5 dB, the in-band return loss is less than -15 dB and the maximum out-of-band rejection is less than -40 dB. The measured results agree well with the simulation results.