We present a Luneberg-like cylindrical lens antenna experimentally using metamaterials.The cylindrical lens antenna with a broad bandwidth is made up of the non-resonant I-shaped metamaterial structures.The near-field...We present a Luneberg-like cylindrical lens antenna experimentally using metamaterials.The cylindrical lens antenna with a broad bandwidth is made up of the non-resonant I-shaped metamaterial structures.The near-field distributions of the metamaterial lens antenna are measured using a two-dimensional near-field microwave scanning apparatus,and agree well with the simulation results.The far-field radiation patterns of the antenna are also presented to show the high-gain performance in the broad bandwidth.展开更多
基金supported in part by the Natural Science Foundation of Jiangsu Province (BK2008031)National Basic Research Program of China (2004CB719802)+1 种基金"111" Project (111-2-05)National Natural Science Foundation of China (60871016,60671015,and 60621002)
文摘We present a Luneberg-like cylindrical lens antenna experimentally using metamaterials.The cylindrical lens antenna with a broad bandwidth is made up of the non-resonant I-shaped metamaterial structures.The near-field distributions of the metamaterial lens antenna are measured using a two-dimensional near-field microwave scanning apparatus,and agree well with the simulation results.The far-field radiation patterns of the antenna are also presented to show the high-gain performance in the broad bandwidth.
文摘提出一种新的节省计算空间的FDTD-PWS混合算法,并应用于透镜天线的焦面场分析.首先采用FDTD(Finite-Difference Time-Domain)求解得到聚焦透镜天线的口面场的幅度和相位分布,再通过PWS(Plane Wave Spectrum)外推至焦平面,求解得出焦面场分布.根据天线场分布的对称性,将PEC(Perfect Electric Conductor)和PMC(Perfect Magnetic Conduc-tor)边界应用于FDTD的仿真过程,使仿真模型缩减为原模型的1/4,进一步节省了计算空间.应用于毫米波聚焦透镜天线的焦面场仿真分析,并对其焦面场进行平面近场扫描测试,将仿真结果进行探头补偿后与实验数据作比较,证明该方法是精确和高效的.
