宽角扫描的圆极化相控线阵  

Wide-angle scanning circularly polarized phased array antenna

作　　者：姜兴[1] 沈湘 彭麟[1] 李晓峰[1] JIANG Xing;SHEN Xiang;PENG Lin;LI Xiaofeng(School of Information and Communication,Guilin University of Electronic and Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院

出　　处：《电波科学学报》2019年第5期552-557,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61761012&61661011);广西科技计划(AB16380316);桂林电子科技大学研究生优秀学位论文培育项目(16YJPYPSS11)

摘　　要：设计了一款宽波束的圆极化天线单元以及1×4的天线阵列,实现了一维的宽角圆极化扫描.天线单元由单层的辐射贴片和介质基片集成波导(substrate integrated waveguide,SIW)背腔构成,通过在辐射贴片上切角微扰和开U型槽实现右旋圆极化,并利用SIW背腔缝隙展宽波束.同时利用SIW背腔减小阵列单元间的互耦,实现宽角圆极化扫描.仿真与测试结果表明,天线阵列实现了扫描角为-53°~57°,3 dB波束宽度覆盖范围为-76°~79°,在主波束扫描覆盖范围内轴比(axial ratio,AR)均小于3 dB,且在扫描范围内增益变化平稳,可实现良好的宽角范围的圆极化扫描特性.A wide-beam circularly polarized antenna unit and a 1×4 antenna array are designed to realize one-dimensional wide-angle circular polarization scanning in this paper. Antenna unit consists of a single layer radiating patch and a dielectric substrate integrated waveguide (SIW) back cavity. The right-handed circular polarization is achieved by chamfering and cutting the U-groove on the radiating patch, andbroaden the beam is utilized by the SIW back cavity gap. At the same time, the SIW back cavity is used to reduce the mutual coupling between the array elements to realize wide-angle circular polarization scanning. A circular polarization scan characteristic that achieves a good wide angle range. The simulation and test results show that the antenna array has a scan angle from -53° to 57°, 3 dB beam width coverage from -76° to 79°, an axial ratio (AR) of less than 3 dB in the main beam scan range, and a smooth gain variation over the scan range. A circular polarization scan characteristic that achieves a good wide angle range.

关 键 词：宽角扫描 圆极化 相控阵 天线 

分 类 号：TN821.8[电子电信—信息与通信工程]