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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 d B,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 high-gain array antenna operating in the P-band is designed based on the metamaterial surface. The antenna unit designed in this paper is in the all-metal Vivaldi form and can work in the range of 200 MHz to 2 GHz. Antenna arrangement for the one-dimensional E-plane array, set the bottom of the reflector. In order to enhance the antenna gain, a method of loading a metamaterial layer over the antenna is adopted. Use HFSS to simulate the antenna. The simulation results show that the gain of 200 MHz ~ 600 MHz can be increased without increasing the physical area of the antenna by loading the metamaterial layer up to a maximum of 2.7 d B with little change in the active standing wave , Still less than 2 in the working frequency band. This technique provides a completely new idea for the gain enhancement of low-frequency antenna arrays.