卫星导航终端小型化开口缝隙螺旋天线  

Miniaturized Open Slot Helix Antenna for Satellite Navigation Terminal

作　　者：黄隆鑫 袁家德[1] HUANG Longxin;YUAN Jiade(College of Physics and Information Engineering,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]福州大学物理与信息工程学院,福州350116

出　　处：《微波学报》2024年第1期23-27,共5页Journal of Microwaves

基　　金：国家自然科学基金面上项目(62071125);福州市科技创新平台项目(2021-P-029)。

摘　　要：研究了一种小型化卫星导航终端开口缝隙螺旋天线。天线主体为四条宽度渐变的开口缝隙螺旋臂,蚀刻在外表面覆铜的介质基板围成的方型结构上,由印制于介质基板内表面的微带线结构馈电网络进行耦合馈电;馈电网络由底面回形结构和侧面逐渐向上变宽的折形结构组成,使用同轴线接头在天线底部对其馈电。天线总体尺寸为26 mm×26 mm×29 mm,实测结果表明:|S_(11)|≤-10 dB的阻抗带宽为7.88%(1.523 GHz~1.648 GHz),轴比≤3 dB的圆极化带宽为20.26%(1.490 GHz~1.826 GHz),在北斗B1频段中心频率(1.561 GHz)、GPS L1频段中心频率(1.575 GHz)和GLONASS L1频段中心频率(1.602 GHz)处增益分别达到3.33 dBi、3.18 dBi和2.79 dBi。该天线采用开口缝隙螺旋结构,通过简单的馈电网络串行耦合馈电实现天线的圆极化,在较小尺寸情况下实现了较宽的带宽和较好的增益。In this paper,a miniaturized open slot helix antenna for satellite navigation terminal is proposed.The main body of the antenna consists of four open slot helix arms with gradual widths,printed on a square structure surrounded by a copper-covered dielectric substrates while the feeding network printed on the inner surface of the medium for coupling feeding.The feeding network consists of a looped structure on the bottom and a folded structure with a widened and upward side,which is fed at the bottom of the antenna using a coaxial connector.The size of the antenna is 26 mm×26 mm×29 mm.The measured results show that the impedance bandwidth of|S_(11)|≤-10 dB reaches 7.88%(1.523 GHz~1.826 GHz),and the circular polarization bandwidth with an axial ratio≤3 dB is 20.26%(1.490 GHz~1.826 GHz).The gain at the center frequency of Beidou B1(1.561 GHz),GPS L1(1.575 GHz)and GLONASS L1(1.602 GHz)are 3.33 dBi,3.18 dBi and 2.79 dBi respectively.The antenna adopts an open-slot helix structure,realizes the circular polarization of the antenna through serial coupling and feeding of a simple feeding network,and achieves wide bandwidth and better gain in the case of small size.

关 键 词：缝隙螺旋天线 开口缝隙 耦合馈电 圆极化 小型化 卫星导航终端 

分 类 号：TN823[电子电信—信息与通信工程] TN967.1