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本文分析了介质镜象线的波阻抗与几何尺寸和频率的关系;研究了阻抗匹配的必要性和可能性;提出了一种选优的匹配器。对于阻抗比为4.7的两截介质镜象线,得到驻波系数S≤1.10的带宽达10.5 GHz的宽带特性。选优匹配器的性能优于用经典方法设计的匹配器。
In this paper, we analyze the relationship between the wave impedance and the geometrical size and frequency of the dielectric mirror line. We also study the necessity and possibility of impedance matching and propose an optimal matching device. For two dielectric mirror lines with an impedance ratio of 4.7, a broadband characteristic with a VSWR of S ≤ 1.10 up to 10.5 GHz is obtained. The performance of the best match is better than that of the matcher designed by the classical method.