[Objectives]In order to effectively broaden the beam width of the 3 dB axis ratio of a Beidou an-tenna,this paper proposes a slotted laminated microstrip patch antenna loaded with parasitic elements.[Methods]The Beidou dual frequency band feature is realized through a two-layer substrate structure.The bandwidth is widened by slotting.Circular polarized radiation is achieved by cutting corners at the edge of the patch.At the same time,L-shaped parasitic elements are loaded around the patch to broaden the 3 dB axial ra-tio beam width of the antenna.[Results]The measured and simulated results are in good agreement.The rel-ative bandwidths of the antenna in the Beidou B1 and B2 bands are 3%and 7.5%.The beam width of the 3 dB axis ratio can reach 180° and 176°,and the maximum gain can reach 6 dBi.In the Beidou receiver test,the number of antenna satellites can reach more than 17,and the positioning accuracy is within meters.[Conclusions]This paper proposes and validates a high-precision positioning dual band Beidou navigation antenna with wide axis ratio beam width.The results can provide references for the design of small Beidou navigation antennas.
关键词
北斗导航天线/双频带/轴比波束宽度/寄生单元/叠层
Key words
beidou navigation antenna/dual band/axial ratio beam width/parasitic unit/multi-store
维普
万方数据