——本文推导了采用平行耦合的带状线阶梯阻抗谐振器的带通滤波器设计公式。公式考虑了任意耦合电长度以及四分之一波长耦合结构。这种滤波器的优点是通过改变谐振器结构,可以控制寄生响应和插入损耗。利用这个设计公式,设计并制船了两个实验滤波器,它们的性能与理论计算相一致。 - This paper deduces the design formula of the band-pass filter using the parallel coupled stripline ladder impedance resonator. The formula takes into account the arbitrary coupling length and the quarter-wavelength coupling structure. The advantage of this filter is that by changing the resonator structure, parasitic response and insertion loss can be controlled. Using this design formula, two experimental filters were designed and built, and their performance is consistent with theoretical calculations.