A broadband circularly polarized slot antenna with a compact microstrip to CPW transition
A broadband circularly polarized slot antenna with a compact microstrip to CPW transition
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DOI：
10.1002/mmce.21260
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发表时间：
2018-06
期刊：
影响因子：
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通讯作者：
Jingli Guo;Jun‐Na Zhou;Yujing Guan;Bao-hua Sun
中科院分区：
文献类型：
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作者：
Jingli Guo;Jun‐Na Zhou;Yujing Guan;Bao-hua Sun
提出了一种基于共面波导馈电的宽带圆极化缝隙天线的简单结构。为了获得单进给的圆极化，设计了从微带到CPW的过渡，同时激发CPW的奇偶模式。通过调整微带线和CPW两端引入的两个圆形贴片的相对位置和尺寸，可以产生90°的相位差。当这两种模式耦合到宽缝隙天线中时，可以实现宽带圆极化操作。该天线的10 dB反射系数带宽为88.2% (2.49 ~ 6.42 GHz)， 3 dB AR带宽达到50% （2.72 ~ 4.49 GHz）。
A simple structure of broadband circularly polarized slot antenna based on coplanar waveguide (CPW) feeding is proposed in this article. To obtain circular polarization with a single feed, a transition from microstrip to CPW is designed to excite the even and odd modes of the CPW simultaneously. By adjusting the relative position and dimensions of the two circular patches introduced at the end of microstrip line and CPW, a 90° phase difference between two modes can be produced. When the two modes are coupled into the wide slot antenna, broadband circular polarization operation can be realized. The 10‐dB reflection coefficient bandwidth of the proposed antenna is 88.2% (2.49‐6.42 GHz) and 3‐dB AR bandwidth attains 50% (2.72‐4.49 GHz).