本文介绍由平行耦合微带线奇、偶模阻抗设计出厚度不为零的微带线的几何尺寸的一种算法。给出由厚度引起的附加场阻抗近似计算公式,以及用计算机进行综合设计程序流程图。并结合实际应用,绐出了氧化铝陶瓷基片微带线的一些计算结果。附带提及与设计强耦合器件有关的电路制作工艺中的尺寸误差问题。 In this paper, we introduce an algorithm to design the geometrical dimension of the microstrip line with non-zero thickness by the odd and even mode impedances of parallel coupled microstrip lines. Given by the thickness of the additional field impedance approximate formula, as well as the use of computer integrated design flow chart. Combined with the practical application, some results of the calculation of the microstrip line of the alumina ceramic substrate were obtained. Mention is made of dimensional errors in the circuit fabrication process associated with designing strongly coupled devices.