本文提出了一种椭圆函数型带阻滤波器的近似设计法。在利用黑田变换设计窄带宽的带阻滤波器的过程中,引进了电抗斜率参数,用以简化设计计算。在电路结构中,巧妙地利用(?)形微带线,放置三个介质腔,使其中二腔等效为四腔,并且避免了相邻腔体间的耦合,从而获得了满意的带阻特性。 In this paper, an approximate design method of band-stop filter with elliptic function is proposed. In the use of Kuroda transform design of narrowband band-stop filter in the process, the introduction of the resistance slope parameters to simplify the design calculations. In the circuit structure, the use of (?) Shaped microstrip lines, placed three dielectric cavity, which is equivalent to two cavity four cavity, and to avoid the coupling between adjacent cavities, resulting in a satisfactory resistance characteristic.