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非均匀覆盖层谐振腔天线设计
Non-uniform Superstrate Resonant Cavity Antenna Design
摘要点击 25  全文点击 6  投稿时间:2017-10-08  修订日期:2017-10-26
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DOI编号   
中文关键词   谐振腔天线  非均匀  覆盖层  天线设计
英文关键词   resonant cavity antenna  non-uniform  superstrate  antenna design
基金项目   国家自然科学基金
作者单位E-mail
冯攀 四川大学电子信息学院 panpanff@outlook.com 
陈星 四川大学电子信息学院 xingc@263.net 
周永宏 西华师范大学 电子信息学院  
徐可 四川大学电子信息学院  
中文摘要
    提出了一种非均匀覆盖层谐振腔天线(Resonant Cavity Antenna, RCA)设计方法。通过构造反射系数幅值随天线口径面位置变化的函数来实现谐振腔天线覆盖层的非均匀化。使用金属化过孔作为周期结构覆盖层的谐振单元,分别设计出满足反射系数变化的变谐振单元长度和变过孔直径的两种非均匀覆盖层谐振腔天线。它们的阻抗特性、方向图和增益,同具有等反射系数变化规律的非均匀介质覆盖层谐振腔天线一致。结果表明覆盖层的反射系数变化规律是非均匀覆盖层谐振腔天线的决定因数。设计出的两种非均匀覆盖层谐振腔天线实测|S11|<-10 dB阻抗带宽均大于8%,增益均大于18 dBi,同时在阻抗带宽内增益相比峰值增益下降均小于1.5 dB。
英文摘要
    A novel non-uniform superstrate resonant cavity antenna (RCA) design method was proposed. The non-uniform superstrate was constructed by changing the reflection coefficient at different location of the aperture. The values of the reflection coefficients were determined by a given function. Metallic via was chosen as the unit of superstrate, whose reflection coefficient can be determined by changing via diameters or by changing unit length between vias. According these two ways, two kinds of non-uniform superstrate RCAs were designed, both followed the same reflection coefficient function. The performances of two kinds of antennas were very similar, and both satisfy the results forecasted by the reflection coefficient function. The results indicated that reflection coefficient characteristic was the important impact factor for non-uniform superstrate RCA. Two prototype antennas were fabricated and measured. The measured |S11|<-10 dB impedance bandwidth and gain of the two antennas were both greater than 8% and 18 dBi, respectively. The gain only dropped within 1.5 dB from the peak gain in the impedance bandwidth.

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