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基于周期性狭缝阵列的导纳特性研究,提出了一种新的等效电路方法,阐述了狭缝阵列的谐振机理。结果表明,阵列导纳在Smith圆图中的轨迹均是从低频到高频沿顺时针变化,反映了其频率响应特性与无源端口网络的相似性。等效电路的传输曲线与相应的阵列一致,表明等效电路参数求解方法正确,将其应用于分析介质厚度的影响,表明介质加载主要影响等效电容,导致谐振特性的变化。
Based on the study of admittance characteristics of periodic slit arrays, a new equivalent circuit method is proposed, and the resonance mechanism of the slit arrays is described. The results show that the trajectories of the array admittance in the Smith chart change clockwise from low frequency to high frequency, which reflects the similarities between the frequency response characteristics and the passive port network. Equivalent circuit transmission curve is consistent with the corresponding array, which shows that the method of solving the equivalent circuit parameters is correct, which is applied to the analysis of the influence of the dielectric thickness, indicating that the dielectric loading mainly affects the equivalent capacitance, resulting in the change of the resonance characteristic.