Two-Dimensional Electronically Controlled Scanning Phased Array Antenna Based on Liquid Crystal Material
Two-Dimensional Electronically Controlled Scanning Phased Array Antenna Based on Liquid Crystal Material
复制标题
基于液晶材料的二维电控扫描相控阵天线
DOI：
10.1109/apmc46564.2019.9038881
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
D. Jiang
中科院分区：
文献类型：
--
作者：
Shan Luo;Xiaoyu Li;Z. Fu;D. Jiang
本文介绍了一种基于液晶材料的二维电控扫描相控阵天线。该结构由$2\times 2$微带贴片天线阵列、连续可变螺旋折叠延迟线移相器、射频馈电和偏置网络组成。分别研究了悬浮带状线功分器、地面共面波导-悬浮带状线过渡结构和宽带贴片天线。 Ka波段LC无源相控阵就是将上述电路级联而成。仿真结果表明，通过调谐各单元激励相位，实现了阵列的二维相位扫描，扫描角度大于±30°，阵列的−10dB带宽大于4GHz。
In this paper, a two-dimensional electronically controlled scanning phased array antenna based on liquid crystal material is introduced. The structure consists of a $2\times 2$ microstrip patch antenna array, a continuously variable helical folded delay line phase shifter, a RF feed and a bias network. The suspended stripline power divider, ground coplanar waveguide-suspended stripline transition structure and broadband patch antenna are studied respectively. The Ka-band LC passive phased array is developed by cascading the above circuits. The simulation results show that by tuning the excitation phases of each unit, the two-dimensional phase scan of the array is realized, the scanning angle is greater than ±30°, and the −10dB bandwidth of the array is larger than that of 4GHz.