A Novel Broadband Dual-Polarization Antenna Utilizing Strong Mutual Coupling
A Novel Broadband Dual-Polarization Antenna Utilizing Strong Mutual Coupling
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DOI：
10.1109/tap.2013.2287010
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发表时间：
2014-01-01
影响因子：
5.7
通讯作者：
Zong, Xianzheng
中科院分区：
文献类型：
--
作者：
Bao, Zengdi;Nie, Zaiping;Zong, Xianzheng
提出了一种利用强互耦和高隔离度的新型宽带双极化天线。该天线由两个正交偶极子组成，它们具有方形环状臂(SLSA)。为了形成天线的辐射方向图，在天线下面放置了金属反射器。通过巧妙地利用两偶极子之间的强相互耦合，可以同时实现很好的阻抗匹配和足够高的隔离度，本文分析了造成这一现象的原因。仿真和测试结果表明，该天线的阻抗带宽可达57.5%以上，驻波比为31d B。作为一个重要的优点，通过调整天线的配置，可以将天线的输入阻抗控制在一定的范围内，从而可以直接通过同轴电缆馈电，而不需要使用阻抗转换器。此外，天线结构紧凑、简单。
A novel broadband dual-polarization antenna utilizing strong mutual coupling with high isolation is presented in this communication. The antenna is composed of two orthogonally situated dipoles which have square-loop shape arms (SLSAs). And to shape the radiation pattern of the antenna, a metal reflector is placed under the antenna. By elaborately utilizing the strong mutual coupling between the two dipoles, very good impedance match and sufficiently high isolation can be achieved simultaneously, the reasons for which are analyzed in this communication. Both the simulated and the measured results show that a more than 57.5% impedance bandwidth with SWR31 dB can be achieved for the proposed antenna. As an important advantage, the input impedance of the antenna can be controlled within certain limits by adjusting the configurations, thus the antenna can be fed directly by coaxial cables without using impedance transformers. Besides, the antenna structure is compact and simple.