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针对平面螺旋天线要求重量轻、增益大的需求,采用了阿基米德螺旋天线加载高阻抗表面的低剖面方案.方案中设计了一种基板由两种介质材料混合的宽带高阻抗表面,解决了天线加载传统高阻抗表面在工作频段的高端增益下降的问题.仿真结果表明:与加载传统高阻抗表面的螺旋天线相比,加载混合介质基板高阻抗表面的螺旋天线在2 GHz～6 GHz的工作频段内,阻抗匹配和圆极化性能良好,实现了单向辐射和较高且单调平稳的增益.“,”A low profile Archimedean spiral antenna with high impedance surface is designed for weight reduction and high gain application in this paper.Because the gain of the spiral antenna with traditional high impedance surface has decreased in the high frequency range,a broadband high impedance surface with substrate consisted of two kinds of dielectric materials is proposed.The simulation result reveals that compared with the traditional high impedance surface backed spiral antenna,the spiral antenna with high impedance surface which has the hybrid dielectric substrate maintains wideband characteristics and circular polarization performance with respect to the impedance matching,axial ratio and gain without increasing the diameter of the original antenna in the design frequency band (2 GHz ～ 6 GHz).