电子测量与仪器学报

王丽黎,王新庄,张衡,李君君.加载极化扭转人工磁导体的双频圆极化天线[J].电子测量与仪器学报,2023,37(9):33-40

加载极化扭转人工磁导体的双频圆极化天线

Dual-frequency circularly polarized antenna loaded with polarized torsion artificial magnetic conductor

DOI：

英文关键词:polarization rotation artificial magnetic conductor circular polarization antenna dual-frequency

基金项目:国家自然科学基金面上项目(61771389)资助

作者	单位
王丽黎	1. 西安理工大学自动化与信息工程学院，2. 西安市无线光通信与网络研究重点实验室
王新庄	1. 西安理工大学自动化与信息工程学院
张衡	1. 西安理工大学自动化与信息工程学院
李君君	1. 西安理工大学自动化与信息工程学院

Author	Institution
Wang Lili	1. School of Automation and Information Engineering, Xi′an University of Technology,2. Xi′an Key Laboratory of Wireless Optical Communication and Network Research
Wang Xinzhuang	1. School of Automation and Information Engineering, Xi′an University of Technology
Zhang Heng	1. School of Automation and Information Engineering, Xi′an University of Technology
Li Junjun	1. School of Automation and Information Engineering, Xi′an University of Technology

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中文摘要:

为减少多径损耗、抗极化失配,同时满足无线设备对多频段的需求,设计了一款加载极化扭转人工磁导体的双频圆极化天线。极化扭转人工磁导体采用双层结构增加了相位响应,使用矩形环延长电流路径,矩形环中加入圆角和截断的矩形贴片结构引起表面阻抗不平衡性,实现了在 2. 45 GHz 和 5. 8 GHz 频段内高效的极化转换。在双频单极子天线下方加载极化扭转人工磁导体,利用 90°极化旋转效应实现了在低频段左旋圆极化和高频段右旋圆极化。仿真和实验结果表明:设计天线的工作带宽分别为 2. 2~ 2. 58 GHz 和 3. 5~ 6 GHz,3dB 轴比带宽分别为 2. 3~ 2. 56 GHz 和 5. 6~ 6. 2 GHz,峰值增益分别为 16. 8 和 7. 5 dBic。实验结果证实了采用极化扭转人工磁导体可以降低双频圆极化天线的复杂度。

英文摘要:

In order to reduce multipath loss and anti-polarization mismatch, and meet the multi-band needs of wireless devices, a dualband circularly polarized antenna loaded with polarization torsional artificial magnetic conductors is designed. The polarization torsion artificial magnetic conductor adopts a double-layer structure to increase the phase response, uses a rectangular ring to extend the current path, and adds rounded corners and truncated rectangular patches to the rectangular ring which can cause surface impedance imbalance, and achieve efficient polarization conversion in the 2. 45 GHz and 5. 8 GHz bands. A polarization torsion artificial magnetic conductor is applied under the dual-band monopole antenna. By using the 90° polarization rotation effect achieve left-handed circular polarization in low-frequency bands and right-handed circular polarization in high-frequency frequencies. The simulation and experimental results show that the working bandwidth of the designed antenna is 2. 2 ~ 2. 58 GHz and 3. 5 ~ 6 GHz, the 3 dB axial ratio bandwidth is 2. 3 ~ 2. 56 GHz and 5. 6~ 6. 2 GHz, respectively, and the peak gain is 16. 8 and 7. 5 dBic, respectively. Experimental results confirm that the use of polarization torsion artificial magnetic conductors can reduce the complexity of dual-frequency circularly polarized antenna.

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