A wideband polarization reconfigurable antenna based on optical switches and C-shaped radiator
A wideband polarization reconfigurable antenna based on optical switches and C-shaped radiator
复制标题
基于光开关和C形辐射器的宽带极化可重构天线
DOI：
10.1002/mop.32313
复制
发表时间：
2020
影响因子：
1.5
通讯作者：
Liao Shaowei
中科院分区：
文献类型：
--
作者：
Jin Guiping;Li Long;Wang Wei;Liao Shaowei
提出了一种基于光开关和C形辐射器的宽带极化可重构天线。该天线可以实现三种极化模式，线极化（LP），左旋圆极化（LHCP）和右旋圆极化（RHCP）。该天线由一个简单的C形贴片，一个修改的接地平面，一个馈电单元，和两个寄生短截线。在C形贴片中适当地嵌入四个槽以调节CP模式的轴比（AR）性能。在每一品牌的馈电单元中插入两个硅光开关。测量结果表明，该天线在LP模式下的10 dB阻抗带宽为86.8%（1.82-4.61GHz），在LHCP模式下的10 dB阻抗带宽为81.8%（1.3- 3.1GHz）和14.1%（3.3-3.81GHz），在RHCP模式下的10 dB阻抗带宽为81.8%（1.3- 3.1GHz）和19.2%（3.3 ~ 4GHz）。LHCP和RHCP的3 dB AR带宽分别为49.1%（2.38-3.93GHz）和51.4%（2.33-3.94GHz）。模拟结果与实测结果吻合较好。此外，在2.38至3.81GHz的工作带宽范围内，所提出的天线可以满足2.45GHz WiFi、LTE 4G和sub-6 GHz 5G应用。
A wideband polarization reconfigurable antenna based on optical switches and a C-shaped radiator is proposed. The antenna can achieve three polarization modes, linear polarization (LP), left-hand circular polarization (LHCP), and right-hand circular polarization (RHCP). The proposed antenna consists of a simple C-shaped patch, a modified ground plane, a feeding unit, and two parasitic stubs. Four slots are embedded in the C-shaped patch properly to adjust the axial ratio (AR) performance for CP modes. And two silicon optical switches are inserted into each brand of the feeding unit. The measured results show that the proposed antenna has a 10-dB impedance bandwidth of 86.8% (1.82-4.61GHz) in LP mode, 81.8% (1.3-3.1 GHz) and 14.1% (3.3-3.81GHz) for LHCP mode, and 81.8% (1.3-3.1 GHz) and 19.2% (3.3-4 GHz) for RHCP mode. The 3-dB AR bandwidth is about 49.1% (2.38-3.93GHz) for LHCP and 51.4% (2.33-3.94GHz) for RHCP. The simulated and measured results show a pretty good agreement. Furthermore, in the range of operating bandwidth from 2.38 to 3.81GHz, the proposed antenna can satisfy the 2.45GHz WiFi, LTE 4G, and sub-6GHz 5G applications.