基于频率选择表面的具有波束赋形功能的圆极化器。
A Circular Polarizer with Beamforming Feature Based on Frequency Selective Surfaces.
机构信息
State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.
Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing, 210096, China.
出版信息
Sci Rep. 2017 Jan 27;7:41505. doi: 10.1038/srep41505.
We propose a circular polarizer with beamforming features based on frequency selective surface (FSS), in which a modified anchor-shaped unit cell is used to reach the circular polarizer function. The beamforming characteristic is realized by a particular design of the unit-phase distribution, which is obtained by varying the scale of the unit cell. Instead of using plane waves, a horn antenna is designed to feed the phase-variant FSS. The proposed two-layer FSS is fabricated and measured to verify the design. The measured results show that the proposed structure can convert the linearly polarized waves to circularly polarized waves. Compared with the feeding horn antenna, the transmitted beam of the FSS-added horn is 14.43° broader in one direction, while 3.77° narrower in the orthogonal direction. To our best knowledge, this is the first time to realize circular polarizer with beamforming as the extra function based on FSS, which is promising in satellite and communication systems for potential applications due to its simple design and good performance.
我们提出了一种基于频率选择表面（FSS）的具有波束成形功能的圆极化器，其中使用改进的锚形单元来实现圆极化器功能。波束成形特性是通过单元相位分布的特殊设计来实现的，该设计通过改变单元尺寸来获得。我们使用喇叭天线代替平面波来馈电相位变化的 FSS。提出的两层 FSS 已制作并进行了测量以验证设计。测量结果表明，所提出的结构可以将线极化波转换为圆极化波。与馈电喇叭天线相比，FSS 加喇叭的发射波束在一个方向上宽 14.43°，而在正交方向上窄 3.77°。据我们所知，这是首次在 FSS 基础上实现具有波束成形功能的圆极化器，由于其设计简单、性能良好，有望在卫星和通信系统中得到应用。
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