The precise expression for the insertionloss of the parallel coupled microstrip line output bandpass filter has been given on the basis of related mathematical models.
本文在相关数学模型的基础上，推导出平行耦合微带线和平行耦合微带线输出带通滤波器插损的精确表达式。
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The elliptic-function filter using hairpin stepped impedance has such advantages as compact structure, low insertionloss, broad-stopband and high steep.