基于环天线-偶极子模型,本文提出一种宽带全向圆极化天线.天线包含四对围绕圆柱放置的倾斜振子和一个宽带馈电网络.每对振子包含一个主辐射振子和一个用以增加带宽的寄生振子.馈电网络包括四个宽带巴伦和一个阻抗匹配电路.实验结果表明,该天线15-dB回波损耗带宽和3-dB轴比带宽分别为31%(1.68-2.31GHz)和30%(1.7-2.3GHz),水平面不圆度小于1dB.
Abstract
This paper proposes a broadband omnidirectional circularly polarized (CP) antenna based on a loop-dipole configuration.The antenna consists of four pairs of titled dipoles and a broadband feeding network.The four pairs of titled dipoles are wrapped around a cylinder.Each pair of titled dipoles includes a driven dipole and a parasitic element which is introduced to enhance the bandwidth.The feeding network is composed of four broadband baluns and an impedance matching circuit.Experimental results show that this CP antenna has a 15-dB return loss bandwidth of 31%(1.68-2.31GHz) and a 3-dB axial ratio bandwidth of 30%(1.7-2.3GHz).The gain variation in the horizontal plane is less than 1dB
关键词
全向天线 /
圆极化天线 /
宽带天线
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Key words
omnidirectional antenna /
circularly polarized antenna /
broadband antenna
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中图分类号:
TN82
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参考文献
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脚注
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基金
国家自然科学基金 (No.61372009); 中央高校业务费 (No.2013ZP0014); 高等学校博士学科点专项科研基金 (No.200805610007)
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