为了解决销钉波导端口阻抗参数计算复杂问题，采用一种新的分析方法，建立单销钉波导等效电路模型，利用级联规律，在分析三销钉波导时，把 3个单销钉的等效电路级联起来进行分析，从电路角度解决销钉波导问题。把通过 HFSS电磁仿真软件计算的销钉波导端口的阻抗参数与通过等效电路计算的销钉波导端口阻抗参数进行对比，两者结果一致。验证了该销钉波导等效电路的正确性以及这种销钉波导的分析方法的有效性。

In order to solve the complex calculation problem of the pin waveguide port impedance parameters, a new pin waveguide analysis method is utilized to establish the equivalent circuit model of single pin waveguide. Using the cascading law, when analyzing the three-pin waveguides, the equivalent circuits of the three single pins are cascaded together to solve the pin waveguide problem from the circuit point of view. The impedance parameters of the pin waveguide ports calculated by HFSS electromagnetic simulation software and by equivalent circuit are compared, and the results are consistent. The correctness of the pin waveguide equivalent circuit and the effectiveness of the pin waveguide analysis method are verified. The goal of simplifying the calculation of the pin waveguide impedance parameters is achieved.