Wideband quasi‐Yagi antenna with stable radiation patterns for base‐station applications
Wideband quasi‐Yagi antenna with stable radiation patterns for base‐station applications
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DOI：
10.1002/mop.33112
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发表时间：
2022-03
影响因子：
1.5
通讯作者：
Duo-long Wu;K. Yang;Wenjun Zhu;Jian‐Feng Li;L. Ye
中科院分区：
文献类型：
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作者：
Duo-long Wu;K. Yang;Wenjun Zhu;Jian‐Feng Li;L. Ye
本文提出了一种新型的宽带准八木天线，它具有偶极子驱动器、八角形导向器和箱形反射面。为了实现良好的阻抗匹配，偶极子驱动器由具有阶跃微带的宽带巴伦激励。此外，提出的八角形导向器不仅实现了良好的阻抗匹配，而且稳定了辐射方向图。为了进一步稳定辐射方向图，天线的反射面被设计成箱形。结果表明，该天线在1.65~3.93Ghz的频带范围内，对|S11|≤−的带宽达到81.7%。此外，该天线在水平面上获得了62±5°的稳定半功率波束宽度，在1.7~3.6 GHz范围内获得了8.3±1 dBI的高增益。
A novel wideband quasi‐Yagi antenna with a dipole driver, an octagon‐shaped director, and a box‐shaped reflector is proposed in this letter. The dipole driver is excited by a wideband balun with a stepped microstrip for good impedance matching. In addition, the proposed octagon‐shaped director not only realizes good impedance matching but also stabilizes the radiation pattern. To further stabilize the radiation pattern, the reflector of the antenna is designed in a box shape. As a result, the proposed antenna achieves a wide bandwidth of 81.7% for |S11| ≤ −15 dB from 1.65 to 3.93 GHz. Additionally, the proposed antenna obtains a stable half‐power beamwidth of 62 ± 5° in the horizontal plane and a high gain of 8.3 ± 1 dBi from 1.7 to 3.6 GHz.