A novel broadband dual-polarized dipole antenna element for 2G/3G/LTE base stations
A novel broadband dual-polarized dipole antenna element for 2G/3G/LTE base stations
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DOI：
10.1109/rfid-ta.2016.7750738
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发表时间：
2016-09
期刊：
影响因子：
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通讯作者：
Yejun He;Yadong Yue
中科院分区：
文献类型：
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作者：
Yejun He;Yadong Yue
针对2G/3G/LTE基站设计了一种新型的带寄生支路的宽带双极化正交偶极子天线单元。该天线主要包括一个曲面反射面、两个交叉振子、一对馈电带和两对平衡-不平衡（BALUN）变压器。与传统的方环辐射偶极子天线相比，采用两个寄生金属短截线和两对寄生金属分支后，天线的阻抗带宽得到了很大的提高，并且通过优化反射面的角度，天线的辐射性能得到了改善。仿真结果表明，该天线单元工作频率为1.7 ~ 2.7GHz，阻抗带宽VSWR <1.5，端口隔离度大于30 dB，H面和V面半功率波束宽度为65.2° ~ 5.6 °，偶极子天线增益为8.5 ± 0.4（dBi）。此外，测量结果与模拟结果有很好的一致性。
A novel broadband dual-polarized crossed-dipole antenna element with parasitic branches is designed for 2G/3G/LTE base stations. The proposed antenna mainly comprises a curved reflector, two crossed-dipoles, a pair of feeding strips, and two couples of balanced-unbalanced (BALUN) transformers. Compared to the traditional square-loop radiator dipole, the impedance bandwidth of the proposed antenna can be greatly improved after employing two parasitic metal stubs and two pairs of parasitic metal branches, and a better radiation performance of the proposed antenna can be obtained by optimizing the angle of the reflector. Simulation results show that the proposed antenna element can operate from 1.7 to 2.7 GHz with has an impedance bandwidth of VSWR <; 1.5, the port isolation of more than 30 dB, a stable radiation pattern with half-power beamwidth 65.2°-5.6° at H-plane and V-plane, and a relatively stable dipole antenna gain of 8.5 ± 0.4 (dBi). Furthermore, measured results have a good agreement with simulated ones.