摘要
针对低轨卫星通信系统需求,文中设计提出了一种工作于Ku频段的低成本宽角扫描相控阵天线。天线由4部分组成,最上层为印有寄生贴片的低成本塑料薄膜,中间为镂空的低介电常数支撑介质,下方为印有主辐射贴片的介质基板,最底层为多层介质基板层叠压合的PCB(Printed Circuit Board),其中含有用于馈电的带状线和H型耦合缝隙。天线单元通过寄生贴片有效拓宽了工作频带,并采用双馈点结构实现了极化可重构。利用上述单元结合镜像排列方法组成了8×8相控阵天线,其工作频带覆盖了13.7~14.5 GHz。仿真结果表明,相控阵天线工作于圆极化时在全频段内扫描增益大于18.48 dBic,相较于天顶方向,天线在60°波束方向扫描增益下降最大值为3.2 dB。
A low-cost Ku-band phased array antenna is proposed for low Earth orbit satellite communication systems.The antenna is composed of four layers:the top layer is a low-cost plastic film printed with parasitic patches,the second layer is a hollow low-permittivity support substrate,the third layer is a dielectric substrate printed with the main radiating patches,and the bottom layer is a multilayer laminated PCB(Printed Circuit Board)in which feeding striplines and H-shaped coupling slots are integrated.Bandwidth enhancement is achieved through the incorporation of parasitic patches,while polarization reconfigurability is enabled by a dual-feed configuration.Based on these elements and mirror arrangement technique,an 8×8 phased array is constructed,covering the frequency range of 13.7~14.5 GHz.Full-wave simulations demonstrate that,under circular polarization,the array maintains a scanning gain higher than 18.48 dBic across the entire band.Compared with the broadside direction,the maximum gain reduction at 60°beam scanning is 3.2 dB.
作者
王迎栋
WANG Yingdong(The 54th Research Institute of CETC,Shijiazhuang 050081,China;School of Telecommunications Engineering,Xidian University,Xi’an 710071,China)
出处
《电子科技》
2025年第10期106-112,共7页
Electronic Science and Technology
基金
CETC发展基金(20250007)。
关键词
KU频段
低成本
双馈点
相控阵
宽角扫描
卫星通信
Ku-band
low-cost
dual-feed
phased array
wide-angle scanning
satellite communication
