文章基于短路枝节模型设计了一个通带范围为3.1～10.6 GHz的超宽带滤波器。滤波器两侧的半波长传输线中集成低通单元以改善上阻带特性,其余的半波长传输线用蜿蜒线替代以减小纵向尺寸,缓解了传统短路枝节超宽带滤波器寄生通带过近和纵向尺寸偏大的问题。通过替代单元与半波长传输线在通带内特性等效,设计过程大大简化。滤波器的实测结果与仿真结果一致,在22.8GHz范围内上阻带抑制优于20dB。 In this paper, an ultra-wide band filter with a passband range of 3.1 ~ 10.6 GHz is designed based on the short-circuit branch model. Low-pass elements are integrated in the half-wavelength transmission lines on both sides of the filter to improve the upper resistance band characteristics. The remaining half-wavelength transmission lines are replaced by meandering lines to reduce the longitudinal dimension, alleviating the parasitic pass band of the conventional short-circuited stub ultra- And the vertical size is too large. By replacing the unit with the half-wavelength transmission line in the passband, the design process is greatly simplified. The measured results of the filter are consistent with the simulation results. The upper stopband rejection is better than 20dB in the 22.8GHz range.