摘要
提出一种应用于极化/方向图分集的新型宽带环形天线。该天线由8个环形排列的印刷偶极子天线组成, 相邻偶极子臂交叠排列以实现容性加载。与传统环形阵列天线不同, 本文首次提出相邻两个单元抽取式激励的馈电方式, 并证明此方法可保持天线的宽带特性。在该环形天线的口径下, 具有4个独立馈电端口, 因此可通过适当的馈电网络实现极化/方向图分集特性。以该环形天线为例, 设计了一个宽带双极化环形天线。为在Z方向上实现两个具有最大辐射的正交线极化, 周期性地提取两个相邻单元, 并通过一个端口馈电。考虑阻抗和相位匹配, 差分馈电网络和集成巴伦被设计为实现定向辐射模式。由于所提天线是空心的, 它可以作为多频带共用孔径天线单元应用。仿真和测试结果表明该天线的两个正交极化同时具有电压驻波比小于2的50.5%(1.04–1.82 GHz)工作带宽, 端口间隔离度小于23 dB。测试的实际增益范围是6.1–8.1 dBi, 并且在整个频带内具有稳定的定向辐射波束。
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Li SUN designed the research. Guanxi ZHANG guided the research. Li SUN processed the data. Li SUN and Shigang ZHOU drafted the paper. Shigang ZHOU, Guanxi ZHANG, and Baohua SUN revised the paper. Shigang ZHOU finalized the paper.
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Li SUN, Shigang ZHOU, Guanxi ZHANG, and Baohua SUN declare that they have no conflict of interest.
Project supported by the National Natural Science Foundation of China (Nos. 61901255 and 61771395), the Taicang City Natural Science Foundation of China (No. TC2020JC09), the Shaanxi Provincial Natural Science Foundation of China (No. 2018JM6085), and the Starting Research Fund from the Northwestern Polytechnical University, China (No. D5000210622)
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Sun, L., Zhou, S., Zhang, G. et al. A novel wideband ring antenna for polarization/pattern diversity. Front Inform Technol Electron Eng 23, 975–983 (2022). https://doi.org/10.1631/FITEE.2100421
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DOI: https://doi.org/10.1631/FITEE.2100421