张量人工阻抗单元的阻抗计算及应用

Analysis and application of tensor artificial impedance surface

提出了一种张量人工阻抗单元的表面阻抗分析计算方法,主要对矩形形状单元的表面阻抗开展了研究。通过仿真软件Ansys-HFSS提取了人工阻抗单元表面的入射散射场,再利用等效传输线技术计算出表面的张量阻抗。利用张量阻抗与表面场的关系,给出了人工阻抗单元的标量阻抗与传播方向的关系,验证了计算的准确性。最后作为实例,设计了一种基于张量阻抗单元的圆极化全息天线,天线具有较好的圆极化特性,增益大于21 d B。

The tensor Artificial Impedance Surface(AIS)is analyzed and simulated by using Ansoft HFSS.With the surface incident and scattered electric and magnetic fields,the surface tensor impedance is calculated by transverse resonance technique.As an example,a circularly polarized holographic antenna is designed based on tensor artificial impedance surface,and a simulated gain of21dB and some good circularly polarized characteristics are obtained.