ABSTRACT

In this paper, a new approach to enhance the radiation efficiency of microstrip patch antennas by a quarter-wavelength antireflection superstrate is proposed. It is based on dielectric right-handed metamaterial (MM) built with U-shaped cells. The moments method in the spectral domain predicts a maximum radiation efficiency of 78% for disk microstrip antenna combined with quarter-wavelength dielectric antireflection superstrate. Design, optimisation and characterisation of the metamaterial layer are well described. A numerical analysis of the microstrip patch antenna disk with and without metamaterial antireflection layer is performed with commercial specialised software. The results of the simulation show significant performance improvement of the antenna in the presence of the metamaterial antireflection layer. Radiation efficiency, directivity and gain are respectively increased by 9%, 2dBi and 2.6 dB. This approach enabled to improve the total radiated power up to 18%.

摘要

在本文中，提出了一种通过四分之一波长抗反射覆板提高微带贴片天线辐射效率的新方法。它基于用 U 形单元构建的介电右手超材料 (MM)。谱域矩量法预测盘式微带天线结合四分之一波长介电抗反射覆板的最大辐射效率为 78%。很好地描述了超材料层的设计、优化和表征。使用商业专用软件对具有和不具有超材料抗反射层的微带贴片天线盘进行数值分析。仿真结果表明，在存在超材料抗反射层的情况下，天线的性能显着提高。辐射效率，方向性和增益分别增加9%、2dBi和2.6dB。这种方法能够将总辐射功率提高 18%。