基于传输线模型的高阻表面反射相位分析

采用传输线模型对高阻表面表面阻抗进行建模,准确计算垂直入射条件下高阻表面的反射相位.在垂直入射条件下，过孔的影响可以忽略，将高阻表面等效为具有容性的贴片阵与具有感性的介质层的并联，利用传输线原理求得高阻表面的反射系数，再得到其反射相位.计算了不同参数的高阻表面反射相位，传输线模型计算反射相位与数值方法计算结果符合较好.制作了不同参数的高阻表面并测量其反射相位，实验结果表明传输线模型计算反射相位结果与测量结果基本符合，证明了传输线模型的正确性. 关键词： 高阻表面 反射相位 传输线模型

Analysis of reflection phase for high impedance surface based on a transmission line model

A transmission line model capable of predicting the reflection phase of high impedance surfaces in normal incident is proposed. The surface impedance of high impedance surface （HIS） can be regarded as the effective capacitive impedance of patch array in parallel with the inductive impedance of substrate layer, and the effect of vias conductor can be ignored at normal incidence. Results of the a nalytical model agree well with the HFSS simulated results. HIS with different parameters are fabricated and tested, the reflection phase of HIS predicted using the transmission line model agree well with the measured results, which proves the validity of this transmission line model.