介绍一种SIR谐振环采用伪交指结构设计微带带通滤波器的设计方法。仿真与实测结果表明该滤波器阻带性能优良,尺寸很小,利于系统小型化设计。为了使滤波器具有更加陡峭的边缘特性,我们在设计中引入马刺线,结果表明引入马刺线后,滤波器尺寸变化不大,阻带性能和通带选择性则更加优良。 A design method of microstrip band-pass filter with pseudo-interdigitated structure is introduced. The simulation and measured results show that the filter has excellent stop-band performance and small size, which is beneficial to system miniaturization design. In order to make the filter have more steep edge characteristics, we introduce the spur line into the design. The result shows that the filter size does not change much after the spur line is introduced, and the stopband performance and the passband selectivity are more excellent.