摘要
提出了一种适用于北斗卫星导航终端的小型圆极化微带天线,该天线通过在微带天线基片中加载四个接地探针圆盘来实现天线小型化,利用不同半径圆盘对辐射贴片的耦合来实现微带天线的圆极化。天线尺寸为0.215λ_0×0.215λ_0×0.03λ_0(λ_0表示在自由空间中天线中心工作频率对应的波长)。测试结果表明:该天线S_(11)值低于-10 dB的带宽为53 MHz(1.587 GHz^1.640 GHz),3dB轴比带宽为19 MHz(1.608 GHz^1.627 GHz),完全满足北斗一代卫星导航终端L频段的应用需求。
A miniaturized circularly polarized disk-loaded microstrip antenna is presented for Beidou navigation satellite system ap- plication. Four metal disks, which are centrally connected to the ground with short wires are loaded on the substrate of traditional microstrip antenna for miniaturization. The proposed four metal disks are designed with different radii to obtain a circular polarized antenna. The proposed antenna shows a compact size of O. 215A0 x 0. 215Ao x O. 03A0, where A0 is the free-space wavelength at the central frequency of antenna. The measured results show that bandwidth of $11 which is less than -10 dB of the proposed anten- na is 53 MHz （ 1. 587 GHz - 1. 640 GHz） and the 3 dB axial ratio bandwidth is about 19 MHz （ 1. 608 GHz - 1. 627 GHz） which completely cover the uplink L-band of BDS-1.
出处
《现代雷达》
CSCD
北大核心
2017年第12期64-66,77,共4页
Modern Radar
基金
河北省博士后基金项目(B2017003016)
关键词
微带天线
圆极化
小型化
microstrip antenna
circular polarization
miniaturization
