花纹螺旋结构的倾斜波束圆极化线阵设计  

Design of the tilted beam and circularly polarized linear array based on the flower-spiral structure

作　　者：李思佳[1] 曹祥玉[1] 杨欢欢[1,2] 陈大森[3] 郭蓉[1] 

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077 [2]清华大学微波与天线研究所,北京100084 [3]海南广播电视大学,海南海口570208

出　　处：《电波科学学报》2014年第6期1133-1139,共7页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(No.61271100;61471389);陕西省自然科学基础研究计划项目(No.2012JM8003);空军工程大学信息与导航学院博士创新基金(KGD 080914002)资助

摘　　要：为了提高天线的增益,在阵列天线理论的基础上,设计了一种新型花纹螺旋结构的八元斜波束圆极化直线阵.该阵列以花纹阿基米德(Archimedean)螺旋线为单元,利用微带型Wilkinson功分器实现馈电,通过阵列单元间距的优化,实现了阵列高增益的目的对阵列进行了设计、仿真、加工和实测,实测结果和仿真结果吻合较好.实测表明,该八元直线阵列在30°倾斜角度方向上取得了18dBi以上的增益,阵列在6.1GHz时取得了最大增益192dBi,同时阵列保持了18.75%相对带宽的圆极化辐射特征,在工作频段内阵列的交叉极化分量小于-13dB.In order to enhance the gain of antenna, a novel 8-element circularly polar- ized linear array is proposed based on the array theory. The linear array is composed of 8-element flower-Archimedean-spiral structure and microstrip Wilkinson feed line. The gain of the array antenna is increased through the distance optimization between the near cells. The array is designed, simulated, fabricated and measured for indicating its avail- ability. The experimental results are carried out to verify the simulation results. The measurement shows a promising performance of the array. The experimental results in- dicate that the array achieves a-10 dB return loss bandwidth of 18.75 %. The gain of the array is more than 18 dBi and the maximal gain is 19.2 dBi at 6.1 GHz when the azi- muth angle of tilted beam is approximately 30° with the circularly polarization. The cross-polarization component of the array is smaller than --13 dB in the band from 5, 8GHz to 7GHz.

关 键 词：直线阵 倾斜波束 花纹Archimedean螺旋结构 Wilkinson馈电 

分 类 号：TN82[电子电信—信息与通信工程]