基于低折射率人工电磁材料高方向性阵列天线

The High Directive Antenna Array Using Low Refractive Metamaterials

讨论了一种低折射率人工电磁材料应用于天线阵设计,在口径面积相同的情况下,获得了比传统天线阵更高的方向性。这种阵列天线有如下一些特征:阵元数量显著减少,阵元间距远大于一个波长,馈电网络简单。人工电磁材料由两层周期性的正方形金属网格构成,置于阵元的上方。结果表明:一个由同轴馈电的2×2微带贴片集成人工电磁材料覆层构成的阵列天线,具有26d B以上的高方向性,优于传统天线。相同口径面积的情况下,一个4×4阵元集成人工电磁材料覆层的天线阵结构,其增益与一个传统的16×16阵元的天线阵结构相当。前者显而易见地具有更简单的馈电网络和较高的天线口径效率。本文提出的天线阵,在高增益天线系统中具有较高的应用价值。

Design of a antenna array based on a low refractive index metamaterials can achieve the directive of higher than traditional antenna array under the diameter of the same area. The antenna array has the following characteristics: a significant reduction in the number of array elements,array element spacing is much larger than a wavelength and feed network is simple. Under the same aperture size,The gain of a 4 × 4 array integrated metamaterials superstrate antenna array structure is close to that of the conventional 16 × 16 array antenna. The antenna array proposed in this paper has a high value in the high gain antenna system.