一种中心枝节折叠的新型超宽带滤波器

A Novel Ultra-wideband Filter with the Center-minor Folded

为了改善超宽带滤波器存在插入损耗较大,带外抑制特性较差等问题。采用中心加载折叠枝节多模谐振器结构,设计了一种新型超宽带滤波器。改变该滤波器多模谐振器的参数,可调节谐振器的谐振频率。该滤波器整体性能良好,具有结构紧凑,尺寸小,插入损耗小及带外抑制特性好等优点。仿真结果表明,该滤波器的中心频率为6.85GHz,通带为3~10.7GHz,实现相对带宽112%。实物测试结果与仿真结果基本一致。

A novel ultra-wideband（UWB） filter with the center-loaded folded multiple-mode resonator structure is designed to improve the problem of large insertion loss and bad rejection features outside of the pass band. Different resonance frequency of the resonator can be adjusted by changing different parameters of the multi mode resonator structure of the filter. The filter has better performance with some merits, such as compact structure, small size, low insertion loss and better rejection features outside of the pass band,and so on. Simulation results show that the pass band of the filter is from 3 GHz to 10.7 GHz at 6. 85 GHz center frequency,achieving 112% relative band width. The tests results are approximately conform to the simulation results.