基于超材料表面设计了一种工作在P 波段的高增益阵列天线,文中设计的天线单元采用全金属Vivaldi 形式,可工作在200 MHz ～2 GHz。天线排布为一维E 面阵列,下方置有反射板。为提升天线增益,采用在天线上方加载超材料层的方式。使用HFSS 对天线进行仿真。仿真表明:通过加载超材料层的方法,可以在不增加天线物理面积的情况下,使其在200 MHz ～600 MHz 的增益得到提升,最大可达2. 7 dB,且有源驻波变化不大,在工作频段内仍小于2。该技术为低频天线阵列的增益提升提供了一种全新的思路。

A novel P-band antenna array based on metamaterial surface is proposed. The prototype of the array element forms as all metal Vivaldi antenna, working from 200 MHz to 2 GHz. The antenna elements are arranged to a linear E鄄plane array, with a reflector board on below. To enhance the gain, metamaterial layer is adopted. Simulation software HFSS is used in this case to simulate the antenna. The result shows that, by using the metamaterial layer, it is possible to increase the gain of the antenna form 200MHz to 600MHz. The gain has been increased by 2. 7 dB for the most, maintaining active VSWR<2 in the band. This technology opens up a new route to enhance the gain of low frequency antenna arrays.

TN821